#  @cognitoedu Cognito
Cognito posts on YouTube about science, stem, how to, what is the most. They currently have [---------] followers and [---] posts still getting attention that total [------] engagements in the last [--] hours.
### Engagements: [------] [#](/creator/youtube::UCaGEe4KXZrjou9kQx6ezG2w/interactions)
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- [--] Year [----------] +272%
### Mentions: [---] [#](/creator/youtube::UCaGEe4KXZrjou9kQx6ezG2w/posts_active)
- [--] Week [---] -1.50%
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### Followers: [---------] [#](/creator/youtube::UCaGEe4KXZrjou9kQx6ezG2w/followers)
- [--] Week [---------] no change
- [--] Month [---------] +1.70%
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- [--] Year [---------] +26%
### CreatorRank: [-------] [#](/creator/youtube::UCaGEe4KXZrjou9kQx6ezG2w/influencer_rank)
### Social Influence
**Social category influence**
[social networks](/list/social-networks) [technology brands](/list/technology-brands) [finance](/list/finance) [countries](/list/countries)
**Social topic influence**
[science](/topic/science) #1669, [stem](/topic/stem) #290, [how to](/topic/how-to), [what is](/topic/what-is) #1476, [what are](/topic/what-are) #424, [for all](/topic/for-all), [ib](/topic/ib), [gas](/topic/gas) #1601, [youtube](/topic/youtube), [study](/topic/study) #28
**Top assets mentioned**
[Noble Corporation (NE)](/topic/$ne)
### Top Social Posts
Top posts by engagements in the last [--] hours
"A-Level Biology - mRNA & tRNA Messenger RNA & Transfer RNA Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Structure and function of messenger RNA (mRNA) * Role in protein synthesis specifically carrying genetic information during transcription. * Structural features including its linear single-stranded form codons and the presence of uracil. [--]. Structure and function of transfer RNA (tRNA) * Role in protein synthesis specifically transporting amino acids during translation. * Structural features including its clover-leaf shape anticodon and amino acid binding site."
[YouTube Link](https://youtube.com/watch?v=8ReRCQkxjnQ) 2025-11-04T15:15Z 1.2M followers, [----] engagements
"A-Level Biology - Human Gas Exchange System - Structure Adaptations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure of the Human Gas Exchange System * The path of air through the trachea bronchi bronchioles and into the alveoli. * The role of respiration in body cells and the need for oxygen. * The removal of carbon dioxide as a waste product. [--]. The Process of Gas Exchange in the Alveoli * An explanation of diffusion and concentration gradients. * How oxygen diffuses from the alveoli into the blood. * How carbon dioxide diffuses from the"
[YouTube Link](https://youtube.com/watch?v=EfJ98vWYcNQ) 2026-01-12T15:30Z 1.2M followers, [----] engagements
"GCSE Biology - Communicable Disease Bacterial Disease (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Bacteria * Distinction between harmful and helpful bacteria (e.g. gut bacteria). * Basic characteristics: single-celled organisms size relative to human cells reproduction within hosts toxin production. [--]. Salmonella * Cause of food poisoning. * Transmission routes (e.g. contaminated food infected chickens). * Symptoms (fever cramps vomiting diarrhoea). * Recovery and importance of hydration. * Prevention through vaccination (UK"
[YouTube Link](https://youtube.com/watch?v=-30_21Juyek) 2025-03-14T15:23Z 1.2M followers, 44.4K engagements
"GCSE Chemistry - Elements Isotopes & Relative Atomic Mass (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Elements and Atomic Structure * Recap of subatomic particles (protons neutrons electrons). * The significance of proton number (atomic number) for element identification. * Overview of the Periodic Table nuclear symbols and element symbols. [--]. Isotopes Explained * Definition of isotopes: atoms of the same element with the same proton number but different neutron numbers. * Illustration with Carbon-12 and Carbon-13. * Note on how isotopes affect"
[YouTube Link](https://youtube.com/watch?v=-FBk8cNvJds) 2025-05-27T16:04Z 1.2M followers, 151.2K engagements
"How to Round Numbers to Significant Figures (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Identifying significant figures in numbers. [--]. How to round numbers to a specific number of significant figures. * Identifying the digit to round (the 'last digit'). * Using the next digit (the 'decider'). [--]. The potential ambiguity of trailing zeros in integers. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Introduction 0:12 What Are Significant Figures 1:02 Counting Significant"
[YouTube Link](https://youtube.com/watch?v=-X0amVzMKFo) 2020-05-26T09:30Z 1.2M followers, 656.6K engagements
"GCSE Physics - How Lenses Work - Convex & Concave Lenses Real & Virtual Images (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two main types of lenses and how they refract light * Convex (converging) lenses that focus parallel light rays to a principal focus. * Concave (diverging) lenses that disperse parallel light rays. [--]. Key properties and terminology for lenses * The principal focus (or focal point) and the axis of a lens. * The definition of focal length. * The relationship between focal length lens curvature and the power of a lens. [--]. The"
[YouTube Link](https://youtube.com/watch?v=0O3NdG0uWM4) 2025-10-10T14:15Z 1.2M followers, 34.4K engagements
"GCSE Physics - Longitudinal & Transverse Waves - Labelling & Calculating Wave Speed (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The function of waves * Waves transfer energy but do not transfer matter. [--]. How to label the parts of a wave * Explanation of displacement-distance graphs. * Labelling amplitude wavelength crest and trough. [--]. Calculating wave frequency * Explanation of displacement-time graphs and time period. * Using the formula frequency = [--] / time period (f = 1/T). [--]. Calculating wave speed * Using the wave speed equation: wave speed"
[YouTube Link](https://youtube.com/watch?v=1DFAy8MXkMA) 2025-10-02T14:15Z 1.2M followers, 62.4K engagements
"GCSE Physics - What Are Magnets How to Draw Magnetic Field Lines Check out our website: https://cognitoedu.link/physics_magnets In this video you'll learn: - What magnets are - How to draw field lines - How field lines show the interaction between magnets This video is suitable for: - Higher and Foundation tiers - All exam boards - Triple and combined science Using a compass to find field lines (not our video) https://www.youtube.com/watchv=DMO373nDp8M Maths Playlist: https://www.youtube.com/playlistlist=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh GCSE Chemistry playlist:"
[YouTube Link](https://youtube.com/watch?v=3elpPfyHV0E) 2019-06-09T09:24Z 1.2M followers, 418.3K engagements
"A-Level Biology - Mitosis - Stages of Mitosis & Cytokinesis Cell Division & Cancer (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What Mitosis and Cytokinesis Are * Their roles as key stages within the cell cycle. * The primary functions of mitosis including growth repairing damaged cells and asexual reproduction. [--]. The Stages of Mitosis and Cytokinesis * Prophase: Chromosomes condense and become visible and spindle fibres form. * Metaphase: Replicated chromosomes align along the centre of the cell (the equator). * Anaphase: Sister chromatids"
[YouTube Link](https://youtube.com/watch?v=6Au1o25WHd0) 2025-12-04T15:30Z 1.2M followers, [----] engagements
"GCSE Chemistry - Covalent Bonding - Formation Drawing Covalent Bonds (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Covalent Bonding Formation * The sharing of electrons between non-metal atoms. * Achieving a stable full outer shell of electrons. * A brief comparison with ionic bonding. [--]. How to Draw Covalent Bonds * Using dot and cross diagrams to show electron sharing. * Representing molecules with displayed formula using lines for bonds. * The use of 3D models to visualise the shape of molecules. [--]. Covalent Bonding in Ammonia * A step-by-step"
[YouTube Link](https://youtube.com/watch?v=7IkYm7ZgiAw) 2025-06-17T16:12Z 1.2M followers, 149.4K engagements
"GCSE Physics - How to Draw Ray Diagrams - Concave & Convex Lenses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to draw ray diagrams for concave (diverging) lenses. * Setting up the diagram with the principal axis and focal points (F and 2F). * Drawing the two key light rays from the top of an object. * Locating the virtual image where the rays appear to originate. [--]. How to describe the image formed by a concave lens. * Understanding the properties: virtual upright and diminished (smaller). [--]. How to draw ray diagrams for convex (converging)"
[YouTube Link](https://youtube.com/watch?v=9mF21_QDpxY) 2025-10-13T14:15Z 1.2M followers, 25.5K engagements
"What are Mixed Numbers and Improper Fractions & How to Convert Between Them (Fractions Part 2) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Improper Fractions. [--]. Mixed Numbers. [--]. Converting Between Fraction Types. * How to convert an improper fraction into a mixed number by division. * How to convert a mixed number into an improper fraction using multiplication and addition. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Introduction 0:16 What are Improper Fractions 1:00 What are"
[YouTube Link](https://youtube.com/watch?v=BKnPKiSrUm8) 2020-04-06T09:00Z 1.2M followers, 112.2K engagements
"GCSE Physics - Voltage Current & Resistance V = IR Equation IV Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The V=IR equation (Ohm's Law) * Defining potential difference (voltage) current and resistance. * Worked examples of calculating voltage and resistance. [--]. Relationship between Voltage Current and Resistance * Understanding the proportional relationship when resistance is constant. [--]. Current-Potential Difference (I-V) Graphs for Ohmic Conductors * The characteristic linear graph for a resistor at a constant temperature. * How the"
[YouTube Link](https://youtube.com/watch?v=BbizKa6eywo) 2025-10-20T14:15Z 1.2M followers, 35.8K engagements
"GCSE Maths - How to Factorise an Expression into a Bracket (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to factorise an algebraic expression using a single bracket. [--]. Finding the Highest Common Factor (HCF) of all terms in an expression. [--]. Writing the expression in its factorised form. [--]. How to check your answer by expanding the factorised expression. [--]. Factorising expressions with two terms and three terms. [--]. Factorising expressions involving multiple different variables. *** EXAM BOARD INFO *** KS3 - Not on your course GCSE Foundation -"
[YouTube Link](https://youtube.com/watch?v=Cep2xcNQSVs) 2020-06-25T11:28Z 1.2M followers, 238.1K engagements
"GCSE Physics - Scalar & Vector Quantities - What They Are Examples How to Represent Vectors Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Scalar Quantities * Scalar quantities have magnitude (size) but no direction. * Examples include speed distance mass temperature and time. [--]. Definition of Vector Quantities * Vector quantities have both magnitude and direction. * Examples include velocity displacement acceleration force and momentum. [--]. Comparing Distance and Displacement * An explanation of how distance (a scalar) differs from displacement (a"
[YouTube Link](https://youtube.com/watch?v=D0Hkd5TaaTQ) 2025-09-08T14:15Z 1.2M followers, 55K engagements
"GCSE Physics - Newton's 1st & 2nd Laws Circular Motion Inertia (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Newton's First Law of Motion * The role of resultant force in changing an object's motion. * How the law applies to stationary and moving objects. [--]. Newton's Second Law of Motion * The relationship between a non-zero resultant force and acceleration. * How acceleration affects an object based on its initial motion (speeding up slowing down changing direction). [--]. Circular Motion as an example of acceleration * The difference between constant"
[YouTube Link](https://youtube.com/watch?v=D8XOm4swxOU) 2025-09-24T14:15Z 1.2M followers, 34.5K engagements
"GCSE Chemistry - Percentage Yield - Theoretical & Actual Yield Calculations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of yield in chemical reactions. * The difference between the actual yield (the amount of product you actually get) and the theoretical yield (the amount of product you expect based on calculations). [--]. Reasons why the actual yield is often less than the theoretical yield. * Incomplete reactions which can occur if a reaction is slow or reversible. * The occurrence of unwanted side reactions which consume reactants to"
[YouTube Link](https://youtube.com/watch?v=DIird9oZVII) 2025-07-03T15:15Z 1.2M followers, 33.9K engagements
"GCSE Chemistry - Metals & Non-metals: Electron Arrangement & Properties (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Metals and Non-metals * Location on the periodic table. * Tendency of metals to form positive ions * Tendency of non-metals to form negative ions or no ions * The role of electron arrangement in achieving a full outer shell and ion formation. [--]. Reactivity Trends in Metals * How metals become more reactive further down their group. * Explanation based on the number of electron shells and the ease of losing outer"
[YouTube Link](https://youtube.com/watch?v=DOB_fJO6-uA) 2025-06-05T14:10Z 1.2M followers, 68.2K engagements
"GCSE Biology - Digestive Enzymes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The necessity of breaking down large biological molecules (carbohydrates proteins lipids) into smaller soluble molecules for absorption. [--]. The role of enzymes as biological catalysts in speeding up digestion. [--]. Carbohydrate Digestion: * Breakdown of starch (a polymer of glucose) by amylase into maltose. * Breakdown of maltose by maltase into glucose. [--]. Protein Digestion: * Breakdown of proteins by protease enzymes (like trypsin and pepsin) into amino acids. [--]. Lipid"
[YouTube Link](https://youtube.com/watch?v=G2y6_VShnwc) 2025-02-27T17:36Z 1.2M followers, 133K engagements
"GCSE Biology - Surface Area to Volume Ratio (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of surface area to volume ratio. [--]. The importance of SA:V ratio for the exchange of substances via diffusion in organisms. * How single-celled organisms exchange substances. * Why large multicellular organisms need specialised systems. [--]. How surface area and volume change as an organism gets larger. [--]. Calculating surface area volume and the SA:V ratio using cube examples. [--]. Why larger organisms cannot rely solely on diffusion across their outer"
[YouTube Link](https://youtube.com/watch?v=GC7phTfotpE) 2022-05-22T10:21Z 1.2M followers, 213.2K engagements
"What is Standard Form (also known as Scientific Notation) (Part 1/4) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Standard Form (Scientific Notation) [--]. The General Format of Standard Form * Understanding the A x [--] structure. [--]. Identifying Correct Standard Form [--]. Converting Numbers from Standard Form to Ordinary Numbers * How positive powers indicate multiplication by [--]. * How negative powers indicate division by [--]. * Step-by-step examples of converting standard form back into ordinary decimal numbers. *** EXAM BOARD INFO ***"
[YouTube Link](https://youtube.com/watch?v=H3ewmorcYjU) 2020-06-01T10:46Z 1.2M followers, 500K engagements
"GCSE Chemistry - Rates of Reaction - How to Measure it How to Show it on Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of the rate of a chemical reaction. * How the speed of a reaction is defined. * Examples of slow moderate and fast reactions. [--]. How to calculate the average rate of reaction. * Using the quantity of reactant used over time. * Using the quantity of product formed over time. * Worked examples with units such as cm/s g/s and mol/min. [--]. How to represent reaction rates graphically. * Understanding that reaction rates"
[YouTube Link](https://youtube.com/watch?v=HaQm4pNMZug) 2025-07-23T14:15Z 1.2M followers, 78.4K engagements
"GCSE Maths - Alternate Corresponding and Allied Angles - Parallel Lines Angle Rules (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. When alternate corresponding and allied angle rules apply. [--]. General properties of the angles formed in that scenario. [--]. The three main angle rules for parallel lines: * Alternate angles are equal. * Corresponding angles are equal. * Allied angles add up to [---]. [--]. How to recognise these angle relationships even when the shapes are rotated or flipped. [--]. Applying these rules to calculate unknown angles in diagrams"
[YouTube Link](https://youtube.com/watch?v=I5auyoXYoX0) 2021-08-15T09:56Z 1.2M followers, 811.2K engagements
"GCSE Biology - How We Control Our Body Temperature View full lesson: https://cognitoedu.link/biology_thermoregulation This video covers: - Why we need to regulate our body temperature - How the thermoregulatory centre in the brain works - How we warm ourselves up when we're too cold - How we cool ourselves down when we're too hot Exam board specific info: AQA - Separate/triple science only IGCSE Edexcel - Everything is relevant to your course Edexcel - Separate/triple science only OCR 21st Century - Separate/triple science only OCR Gateway - Separate/triple science only Related videos/topics:"
[YouTube Link](https://youtube.com/watch?v=IGsQi0JZUTw) 2020-01-26T10:15Z 1.2M followers, 470K engagements
"GCSE Physics - Efficiency Energy & Power (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of efficiency in energy transfers. * The difference between useful energy output and wasted energy. * Why devices are not 100% efficient. [--]. How to calculate the efficiency of a device. * The formula for efficiency using energy input and useful energy output. * The formula for efficiency using power input and useful power output. * How to express efficiency as a decimal or a percentage. [--]. Worked examples of efficiency calculations. * Comparing the"
[YouTube Link](https://youtube.com/watch?v=KbrqbW0um0Y) 2025-08-11T14:15Z 1.2M followers, 38.9K engagements
"GCSE Biology - Differentiation and Specialised Cells (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What specialised cells are. * Examples in animals. * Examples in plants. [--]. How specialised cells are adapted to their function. [--]. The concept of cell differentiation. * How unspecialised cells change to become specialised. * The process starting from a zygote and involving mitosis. [--]. A brief introduction to stem cells. *** CHAPTERS *** 0:00 Intro to Specialised Cells and Differentiation 0:22 What are Specialised Cells 1:01 Sperm Cell Adaptations 2:14"
[YouTube Link](https://youtube.com/watch?v=LNLz7mswPkQ) 2022-03-13T10:15Z 1.2M followers, 506.5K engagements
"GCSE Physics - Specific Heat Capacity Internal Energy & Temperature (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of internal energy. * The total energy stored by the particles within a substance or system. * A breakdown into kinetic energy stores (related to temperature) and potential energy stores. [--]. The relationship between heating internal energy and temperature. * How transferring energy to a substance increases its internal energy. * How temperature is a measure of the average internal energy of the particles. [--]. The definition of"
[YouTube Link](https://youtube.com/watch?v=LUHGFLR2p8k) 2025-08-04T14:15Z 1.2M followers, 69.3K engagements
"GCSE Chemistry - Alkanes - Properties & Combustion (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Properties of alkanes and how they change with carbon chain length. * The trend in boiling points. * State at room temperature (gas liquid solid). * Volatility viscosity and flammability. [--]. The complete combustion of alkanes. * The reactants (hydrocarbon and oxygen) and products (carbon dioxide and water). * Explanation of combustion as an exothermic oxidation reaction. [--]. How to write and balance chemical equations for complete combustion. * A"
[YouTube Link](https://youtube.com/watch?v=MvC2nieIv3A) 2025-10-22T11:00Z 1.2M followers, 24.4K engagements
"GCSE Maths - Types of Triangle (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The four main types of triangles. [--]. Key features of Equilateral triangles. [--]. Key features of Isosceles triangles. [--]. Key features of Right-angled triangles. [--]. Key features of Scalene triangles. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - Not in your course *** CHAPTERS *** 0:00 Intro: The [--] Types of Triangle 0:23 Equilateral"
[YouTube Link](https://youtube.com/watch?v=NAxRP38GtzQ) 2021-03-17T10:30Z 1.2M followers, 147.1K engagements
"GCSE Physics - Speed Velocity Distance & Displacement Scalar & Vector Quantities (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The difference between scalar and vector quantities. * Scalars are defined by magnitude (size) only. * Vectors are defined by both magnitude and direction. [--]. The classification of speed velocity distance and displacement. * Speed and distance are scalar quantities. * Velocity and displacement are vector quantities. [--]. How to calculate speed and velocity using their respective formulae. * The formula for speed: speed ="
[YouTube Link](https://youtube.com/watch?v=NZvMXcIztuU) 2025-09-18T14:15Z 1.2M followers, 46.5K engagements
"GCSE Biology - The Lungs & Gas Exchange (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The structure of the human gas exchange system. * The path air takes from the nose and mouth to the alveoli in the lungs. * The roles of the trachea bronchi bronchioles and alveoli. * The journey of oxygen to the body cells and carbon dioxide away from them. [--]. How gas exchange occurs in the alveoli. * An explanation of gas exchange via diffusion. * The concentration gradients for oxygen and carbon dioxide between the alveoli and the capillaries. [--]. Adaptations of"
[YouTube Link](https://youtube.com/watch?v=Nn4ke02sW8Q) 2025-11-07T15:00Z 1.2M followers, 40.2K engagements
"GCSE Physics - Power & Work Done - Equations Calculations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two definitions of power in physics. * Power as the rate at which energy is transferred. * Power as the rate at which work is done. [--]. The key difference between 'energy transferred' and 'work done'. * Illustrated with examples of charging a phone versus pushing a car. [--]. The equations for calculating power. * P = E / t (Power = Energy transferred / Time). * P = W / t (Power = Work done / Time). [--]. The standard units for power energy work and"
[YouTube Link](https://youtube.com/watch?v=Pf5EHVxc4XI) 2025-08-07T14:15Z 1.2M followers, 41.8K engagements
"GCSE Physics - Development of the model of the atom This video covers: - Democritus - Atomic Theory - John Dalton - Solid spheres - JJ Thompson - Plumb Pudding model - Ernest Rutherford - Nuclear Model - Niels Bohr - Electron shells - James Chadwick - Neutrons General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century -"
[YouTube Link](https://youtube.com/watch?v=Q8y4x5EElm8) 2019-10-08T14:26Z 1.2M followers, 222.7K engagements
"GCSE Physics - Distance-Time Graphs This video covers: - How to interpret distance-time graphs - How to calculate speed on a distance-time graph - What the gradient of the line means - Drawing a tangent General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel - Everything is relevant to your course OCR 21st Century -"
[YouTube Link](https://youtube.com/watch?v=RM02SnuJ0MY) 2019-12-03T15:23Z 1.2M followers, 828.9K engagements
"GCSE Chemistry - Diamond & Graphite - Structure Properties (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Allotropes of Carbon * Definition of allotropes as different structural forms of the same element. * Introduction to diamond graphite graphene and fullerenes. [--]. Structure and Properties of Diamond * A giant covalent structure. * Each carbon atom is covalently bonded to four other carbon atoms. * Forms a regular rigid 3D lattice. * Properties: very strong high melting point and does not conduct electricity as there are no free electrons. 3."
[YouTube Link](https://youtube.com/watch?v=RVV8pncaA7A) 2025-06-19T14:24Z 1.2M followers, 72K engagements
"GCSE Maths - How to Find the Gradient Using the Coordinates of Two Points (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The formula for calculating the gradient of a straight line using two coordinate points. [--]. How to calculate the gradient between two points when only given their coordinates. [--]. How to apply the coordinate method to find the gradient of a line shown on a graph. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your"
[YouTube Link](https://youtube.com/watch?v=T0g6M0YlXvk) 2020-10-04T09:15Z 1.2M followers, 256.6K engagements
"A-Level Biology - Cell Cycle - Interphase Mitosis Cytokinesis Checkpoints (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The purpose and phases of the cell cycle. * The role of cell division in growth and tissue repair. * An overview of the three main phases: interphase mitosis and cytokinesis. [--]. The stages and processes of interphase. * The key activities: cell growth protein synthesis and DNA replication. * A breakdown of the G1 S and G2 phases. [--]. Checkpoints for quality control during the cell cycle. * The role of checkpoints in preventing errors"
[YouTube Link](https://youtube.com/watch?v=TEyVKIebVjA) 2025-11-17T15:30Z 1.2M followers, [----] engagements
"GCSE Chemistry - Paper Chromatography Test yourself with our quiz: https://cognitoedu.link/chemistry_chromatography In this video you'll learn: - What chromatography is used for - The process for setting up and carrying out paper chromatography - What the mobile and stationary phases are GCSE chemistry GCSE 9-1 9-1 Chemistry Chromatography lesson revision chemistry revision gcse science science revision chemistry lesson stationary phase mobile phase chromatogram GCSE chemistry GCSE 9-1 9-1 Chemistry Chromatography lesson revision chemistry revision gcse science science revision chemistry"
[YouTube Link](https://youtube.com/watch?v=TdJ57SQ6GAQ) 2019-05-05T11:18Z 1.2M followers, 1.3M engagements
"GCSE Biology - Mitosis Chromosomes Cell Division Cytokinesis (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The requirement for cell division in multicellular eukaryotic organisms. * For growth development and repair. [--]. An overview of the cell cycle (the life cycle of a cell). * Stage 1: Growth (increase in size and sub-cellular structures). * Stage 2: DNA replication and mitosis. * Stage 3: Division (cytokinesis). [--]. The structure and role of DNA and chromosomes. * How DNA exists as long strings when not dividing. * How DNA condenses into"
[YouTube Link](https://youtube.com/watch?v=UsovRxQAUZ4) 2025-04-17T13:41Z 1.2M followers, 158K engagements
"GCSE Physics - Specific Latent Heat - Vaporisation & Fusion Equation (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Latent heat and changes of state. * Why temperature remains constant during melting boiling freezing and condensing. * Analysing heating and cooling curves (temperature-time graphs). [--]. The definition of specific latent heat. * The energy required to change the state of [--] kg of a substance. [--]. The two types of specific latent heat. * Specific latent heat of fusion (for melting and freezing). * Specific latent heat of vaporisation (for"
[YouTube Link](https://youtube.com/watch?v=VFwf1JldiJA) 2025-12-18T15:15Z 1.2M followers, [----] engagements
"GCSE Physics - Velocity-Time Graphs - How to Find Acceleration & Distance Travelled (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Interpreting Velocity-Time Graphs * How the gradient of the graph represents acceleration. * Identifying sections of constant acceleration constant deceleration and constant velocity. * Understanding what steeper or curved lines mean for acceleration. [--]. Calculating Acceleration * Using the change in velocity and change in time to calculate the gradient. [--]. Calculating Distance Travelled * Understanding that the area under"
[YouTube Link](https://youtube.com/watch?v=VJefeYJL3uE) 2025-09-22T14:15Z 1.2M followers, 50.4K engagements
"Trigonometry SOH CAH TOA Sin Cos Tan Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Identifying right-angled triangles. [--]. Labelling the sides of a right-angled triangle. * Identifying the Hypotenuse (H). * Identifying the Opposite (O) and Adjacent (A) sides relative to a specific angle (x). [--]. Introducing the three main trigonometric ratios. * Sine (Sin) * Cosine (Cos) * Tangent (Tan) [--]. Using the SOH CAH TOA mnemonic to remember trigonometric formulae. [--]. Calculating unknown angles in right-angled triangles. * Using inverse trigonometric functions (sin cos tan). 6."
[YouTube Link](https://youtube.com/watch?v=WFH_7n7hpHo) 2025-02-11T08:39Z 1.2M followers, 322.8K engagements
"GCSE Maths - Area of a Sector and Length of an Arc of a Circle (Circles Part 3) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining Sectors and Arcs. * Minor and major sectors explained. * Minor and major arcs explained. [--]. Calculating the Area of a Sector. * Introducing the formula. * Understanding the formula as a fraction of the total circle area. [--]. Calculating the Length of an Arc * Introducing the formula. * Understanding the formula as a fraction of the total circle circumference. [--]. Applying the Formulas *** EXAM BOARD INFO *** This video"
[YouTube Link](https://youtube.com/watch?v=Wcv0f5PpTv0) 2021-06-06T09:30Z 1.2M followers, 308.9K engagements
"GCSE Chemistry - Graphene & Fullerenes - Structure Properties Uses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Allotropes of Carbon * An introduction to allotropes focusing on graphene and fullerenes. [--]. Graphene * The structure of graphene as a single layer of graphite. * How its hexagonal lattice of carbon atoms makes it strong. * Why it can conduct electricity due to delocalised electrons. [--]. Fullerenes * An explanation of how fullerenes are molecules of carbon atoms with hollow shapes. * The structures are based on hexagonal rings but can also"
[YouTube Link](https://youtube.com/watch?v=ZeJubj0KWdM) 2025-06-20T14:18Z 1.2M followers, 36.1K engagements
"How to Find the Volume of Cylinders & Prisms Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Volume of Prisms and Cylinders * Identifying the constant cross-sectional area as the key feature. * Understanding the general formula for volume. [--]. Formula for the volume of a Cylinder [--]. Formula for the volume of a Triangular Prism [--]. Other Prisms * Recognising that the general volume formula applies to all prisms *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All"
[YouTube Link](https://youtube.com/watch?v=_QdIzOVcjNI) 2021-07-11T12:48Z 1.2M followers, 207K engagements
"GCSE Biology - Characteristics of Living Things (Organisms) (2026/27 exams) Check out our website https://www.cognito.org/ In this video we cover: - The characteristics that all living things have have in common - You can remember these using the acronym MRS GREN where the letters stand for movement respiration sensitivity growth reproduction excretion and nutrition. Exam board specific info: AQA - Not in your course but useful to understand IGCSE Edexcel - Suitable for everyone Edexcel - Not in your course but useful to understand OCR 21st Century - Not in your course but useful to"
[YouTube Link](https://youtube.com/watch?v=aGDFNZApXXI) 2021-06-13T09:15Z 1.2M followers, 565.5K engagements
"GCSE Maths - Solving Inequalities by Plotting them on a Graph (Inequalities Part 4) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to graphical inequalities. [--]. Plotting linear inequalities. [--]. Distinguishing between inequality types on the graph. [--]. Identifying the correct region. [--]. Shading the region that satisfies multiple inequalities. [--]. Alternative methods for indicating the required region. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your"
[YouTube Link](https://youtube.com/watch?v=b9ODSx3RJAE) 2020-09-08T09:15Z 1.2M followers, 355.9K engagements
"GCSE Biology - The Circulatory System The Blood (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Four Main Components of Blood * Red Blood Cells * White Blood Cells * Platelets * Plasma [--]. Red Blood Cells (RBCs) * Function in oxygen transport (haemoglobin and oxyhaemoglobin). * Adaptations: No nucleus biconcave shape. [--]. White Blood Cells * Role in the immune system and defending against infection. * Defence mechanisms: Phagocytosis producing antibodies producing antitoxins. * Presence of a nucleus. [--]. Platelets * Structure (cell fragments no"
[YouTube Link](https://youtube.com/watch?v=c-6ZhcHkB4s) 2025-03-10T15:28Z 1.2M followers, 101K engagements
"A-Level Biology - Nucleic Acids DNA vs RNA (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure of Nucleotides * The three components of a nucleotide: a pentose sugar a phosphate group and a nitrogenous base. * How nucleotides join via condensation reactions to form polynucleotide chains with a sugar-phosphate backbone. [--]. The Structure and Function of DNA * The double helix structure including the antiparallel strands. * The four nitrogenous bases in DNA: adenine guanine cytosine and thymine. * Purines pyrimidines and complementary base"
[YouTube Link](https://youtube.com/watch?v=c8cKqka8Pqc) 2025-10-27T15:22Z 1.2M followers, 14.4K engagements
"GCSE Biology - Structure of a Leaf Plant Cell Organisation (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Levels of organisation in plants. * Cells tissues organs and organ systems. * Example: Leaves stem and roots forming a transport system. [--]. Structure of a plant leaf (cross-section). * Function as the site of photosynthesis. * Key tissues: Epidermis (upper and lower) mesophyll (palisade and spongy) xylem and phloem. [--]. Adaptations of the leaf for photosynthesis and gas exchange. * Role of palisade mesophyll and chloroplasts. * Importance of spongy"
[YouTube Link](https://youtube.com/watch?v=c9aUWHleZ_k) 2025-03-27T15:09Z 1.2M followers, 119K engagements
"GCSE Chemistry - Esters (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Structure of Esters * Identifying the functional group. [--]. Properties and Uses of Esters [--]. Formation of Esters (Esterification) * Reaction between a carboxylic acid and an alcohol. * Identifying the ester link. *** EXAM BOARD INFO *** AQA - Everything is relevant to your course You only need to know the example of ethyl ethanoate. IGCSE Edexcel - Separate/triple science and higher tier only Edexcel - Not in course but useful for understanding condensation polymers"
[YouTube Link](https://youtube.com/watch?v=cYgRd4rXY6I) 2020-03-26T10:30Z 1.2M followers, 429.3K engagements
"GCSE Physics - Static Electricity Build-up of Charge on Insulating Materials (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What is static electricity * The build-up of charge on insulating materials. * Why most materials are electrically neutral. [--]. How static electricity is created by friction. * The transfer of negative electrons between materials when they are rubbed together. * The difference in behaviour between conducting and insulating materials. [--]. How insulating materials become charged. * An explanation of how a polythene rod and a cloth"
[YouTube Link](https://youtube.com/watch?v=d7_dMHwqpgM) 2025-12-09T15:15Z 1.2M followers, 12K engagements
"GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Calculating the original value of an item after a percentage increase or decrease. * Understanding that the original value represents 100%. * Relating the new value to a percentage of the original value. [--]. Method for calculating reverse percentages using the new value. [--]. Calculating the original value when given the actual change in value and the percentage change. * Understanding that the value change corresponds to the"
[YouTube Link](https://youtube.com/watch?v=dIeb2ryQ1ko) 2021-02-23T10:00Z 1.2M followers, 403.1K engagements
"GCSE Maths - What are Inequalities (Inequalities Part 1) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the meaning of inequality symbols. * Less than and More than. * Less than or equal to and More than or equal to. [--]. Working with inequalities. * Using positive and negative numbers. * Understanding equivalent expressions. * Interpreting compound inequalities. [--]. Representing inequalities on a number line. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on"
[YouTube Link](https://youtube.com/watch?v=e_tY6X5PwWw) 2020-08-25T09:00Z 1.2M followers, 847.7K engagements
"GCSE Biology - What are Stem Cells Difference Between Embryonic and Adult Stem Cells Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Key Features of Stem Cells. [--]. Importance of Stem Cells. * Role in development from a fertilised egg into an embryo. [--]. Examples of Stem Cells. * Embryonic stem cells. * Adult stem cells. * Plant stem cells. *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone OCR Gateway - Suitable for everyone CIE - Suitable for"
[YouTube Link](https://youtube.com/watch?v=fp5H3SslskQ) 2022-01-23T10:30Z 1.2M followers, 493.6K engagements
"GCSE & KS3 Biology - Plant Reproduction Anatomy & Pollination Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The reproductive parts of a flowering plant. * An overview of the male reproductive parts (stamen) including the anther and filament. * An overview of the female reproductive parts (carpel) including the stigma style and ovary. * The role of petals and sepals. [--]. The process and types of pollination. * The definition of pollination as the transfer of pollen. * An explanation of self-pollination. * An explanation of cross-pollination. [--]. Flower adaptations for"
[YouTube Link](https://youtube.com/watch?v=g2Y_IlEWXyE) 2025-10-29T15:46Z 1.2M followers, 15.9K engagements
"GCSE Biology - What are Enzymes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The role and importance of enzymes in biological processes. [--]. Definition and function of catalysts and enzymes. * What a catalyst is and its properties. * Enzymes as biological catalysts made of amino acids. * How enzymes speed up specific reactions. [--]. How enzymes work at a molecular level. * The concept of the active site. * The interaction between enzymes and substrates. * Enzyme specificity due to active site shape. [--]. Models explaining enzyme action. * The Lock and"
[YouTube Link](https://youtube.com/watch?v=gUncqL1ul8Q) 2022-02-06T11:01Z 1.2M followers, 550.8K engagements
"GCSE Chemistry - States of Matter & Changing State Find revision notes questions flashcards and more: https://cognitoedu.link/chemistry_states This video explains 'particle theory' and uses it to describe the [--] states of matter: solid liquid and gas. It also covers how substances move between these states at the particle level. This video is suitable for: - All exam boards - Triple and combined science - Higher and Foundation tiers The last part of the video on the limitations of particle theory is only relevant to higher tier students but this is labelled with the usual "Higher Tier" box in"
[YouTube Link](https://youtube.com/watch?v=hkBrw2fG75U) 2019-02-27T14:45Z 1.2M followers, 811.6K engagements
"GCSE Maths - What are Quadratic Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Quadratic Graphs. * Recognising the shape of quadratic graphs (parabolas). * Identifying the corresponding quadratic equations (containing an x term). [--]. Key Features of Quadratic Graphs. [--]. The Significance of the x Term. [--]. Basic Quadratic Graphs. [--]. How Coefficients Affect Quadratic Graphs. * Brief overview of how changing the coefficients and constants transforms the graph. *** EXAM BOARD INFO *** This video is suitable for maths courses around"
[YouTube Link](https://youtube.com/watch?v=ia51_eXDAQ0) 2020-11-08T10:00Z 1.2M followers, 390.3K engagements
"How to Find the Volume of a Frustum Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding what a frustum is. [--]. Method for calculating the volume of a frustum. [--]. Finding the dimensions of the large and small cones. [--]. Worked example. * Step-by-step calculation involving substitution into the volume formula. * Presenting the answer in terms of pi and rounded to significant figures. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course"
[YouTube Link](https://youtube.com/watch?v=j06P-oKn094) 2021-07-25T09:11Z 1.2M followers, 143.1K engagements
"GCSE Biology - Health & Disease (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining health as a state of physical and mental wellbeing. * Understanding health as a spectrum not just healthy or unhealthy. [--]. Exploring the factors that influence health. * Factors contributing to good health (e.g. diet exercise sleep medical care). * Factors contributing to ill health (e.g. stress lack of access to resources). [--]. Defining disease as conditions that cause ill health. [--]. Categorising diseases into two main types. * Communicable (infectious) diseases:"
[YouTube Link](https://youtube.com/watch?v=jRzIhanvvVU) 2025-03-11T15:22Z 1.2M followers, 55.7K engagements
"GCSE Chemistry - Moles & Mass - Avogadro's Constant Formula for Moles Mass & Mr (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of the mole as a unit of measurement in chemistry. * An explanation of Avogadro's constant. * The link between relative atomic/formula mass and the mass of one mole of a substance in grams. [--]. The formula connecting moles mass and relative formula mass (Mr). * How to calculate the number of moles in a sample. * How to rearrange the formula to calculate the mass of a sample. [--]. Applications of mole calculations. *"
[YouTube Link](https://youtube.com/watch?v=kBlmEfS_P00) 2025-06-26T14:41Z 1.2M followers, 143.9K engagements
"GCSE Maths - The Eight 3D Shapes You Need to Know - Vertices Edges and Faces (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the terminology used for 3D shapes (solid shapes). * Explaining vertices edges and faces. * Comparing 3D terms with 2D shape terms (corners sides). [--]. Identifying the [--] most common 3D shapes. * Cube Cuboid Triangular Prism. * Triangle-based Pyramid (including Regular Tetrahedron). * Square-based Pyramid. * Sphere Cylinder Cone. [--]. Analysing the properties of key 3D shapes. *** EXAM BOARD INFO *** This video is"
[YouTube Link](https://youtube.com/watch?v=lEijwy3lrZ8) 2021-06-20T10:41Z 1.2M followers, 262.9K engagements
"GCSE Chemistry - Separating Metals from Metal Oxides Extraction of Metals & Reduction Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Oxidation and Reduction * Oxidation is defined as the process of gaining oxygen. * Reduction is defined as the process of losing oxygen. [--]. Why metals are found as oxides * Most metals are reactive and will oxidise when they come into contact with oxygen in the atmosphere. * Unreactive metals such as gold do not react with oxygen and can be found as pure metals. [--]. Reducing metal oxides with carbon * Metal oxides can be reacted with"
[YouTube Link](https://youtube.com/watch?v=lvEJiiUkrWg) 2025-07-10T16:01Z 1.2M followers, 35.1K engagements
"GCSE Maths - Solving Quadratics Using the Quadratic Formula (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to solve quadratic equations using the quadratic formula. * Identifying the coefficients a b and c from the standard form ax + bx + c = [--]. * Substituting the values of a b and c into the quadratic formula. [--]. Understanding the symbol in the formula leads to two potential solutions. [--]. Calculating the two solutions for x. [--]. Worked examples demonstrating the application of the quadratic formula. *** EXAM BOARD INFO *** This video is suitable"
[YouTube Link](https://youtube.com/watch?v=maejPmUzqpM) 2020-08-05T08:57Z 1.2M followers, 306.7K engagements
"GCSE Maths - Plotting a Line by Finding Where it Crosses the Axes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Plotting straight line graphs. * Using the method of finding where the line crosses the axes. [--]. Finding the y-intercept. * Understanding that x=0 on the y-axis. * Substituting x=0 into the equation to find the y-coordinate. [--]. Finding the x-intercept. * Understanding that y=0 on the x-axis. * Substituting y=0 into the equation to find the x-coordinate. [--]. Worked examples of finding intercepts and plotting the line. *** EXAM BOARD INFO ***"
[YouTube Link](https://youtube.com/watch?v=mhO_ANLBKXo) 2020-10-21T09:00Z 1.2M followers, 102.5K engagements
"GCSE Maths - How to Factorise Quadratics by Completing the Square (Part [--] - Factorise When a=1) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Completing the Square. * Explaining its use for solving or rearranging quadratic expressions. * Understanding the target form: (x + p) + q. [--]. The Method for Completing the Square. [--]. Worked Examples. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro to"
[YouTube Link](https://youtube.com/watch?v=ov3r4hXBU98) 2020-08-10T10:24Z 1.2M followers, 517.1K engagements
"GCSE Maths - What are Bearings (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Bearings. [--]. Rules for Measuring Bearings. [--]. Calculating Bearings. [--]. Applying Bearings. * Using bearings from two different points to locate a third point (intersection). *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course *** CHAPTERS *** 0:00 Intro to Bearings 0:49 The [--] Rules for Bearings 1:48 Example"
[YouTube Link](https://youtube.com/watch?v=pm8i-thxvCo) 2021-08-22T09:43Z 1.2M followers, 1M engagements
"GCSE Biology - Cell Types and Cell Structure (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of cells as the basic smallest independently replicating unit of life. [--]. Comparison of eukaryotic cells: Animal vs. Plant cells. * Sub-cellular structures common to both. * Additional sub-cellular structures found in plant cells. [--]. Structure of prokaryotic cells (bacteria). *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone OCR"
[YouTube Link](https://youtube.com/watch?v=qHkUOlC8Nbo) 2021-05-30T09:00Z 1.2M followers, 1.4M engagements
"GCSE Biology - Classification Systems Linnaean System (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Need for Classification * Traditional methods based on appearance and their limitations. * Issues with common names and indicating relationships. [--]. The Linnaean System * Developed by Carl Linnaeus based on characteristics and structure. * Hierarchical classification: Kingdom Phylum Class Order Family Genus Species. [--]. The Binomial Naming System * Using Genus and Species for unique two-part Latin names (e.g. Homo sapiens). [--]. Developments in"
[YouTube Link](https://youtube.com/watch?v=qRqa454ZIro) 2025-04-30T15:25Z 1.2M followers, 61.8K engagements
"GCSE Biology - Plant Hormones - Tropisms & Auxins https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How plants respond to environmental stimuli like light gravity and touch. [--]. The role of hormones particularly auxins in controlling plant growth responses. * Auxins are produced in shoot and root tips and diffuse to other areas. * Auxins stimulate growth in shoots but inhibit growth in roots. [--]. Explanation of phototropism: the growth response of plants to light. * Shoots exhibit positive phototropism. * Roots exhibit negative phototropism. [--]. Explanation of geotropism (gravitropism): the"
[YouTube Link](https://youtube.com/watch?v=rKHIfsHX1aA) 2020-02-23T10:00Z 1.2M followers, 586K engagements
"GCSE Biology - Drugs - Painkillers vs Antibiotics - Relief vs Treatment (2026/27 exams) Check out our websitehttps://www.cognito.org/ Drugs can either relieve symptoms (painkillers) or treat the underlying disease (antibiotics). Learn about the drugs you need to know and how they work - including why antibiotics don't work against viruses. antibiotics and painkillers gcse antibiotics gcse drugs gcse painkillers gcse gcse antibiotic resistance different types of drugs why don't antibiotics 9-1 gcse gcse biology combined science aqa edexcel ocr aspirin paracetamol antibiotic resistance"
[YouTube Link](https://youtube.com/watch?v=r_5GM3_u0Wo) 2018-12-10T13:22Z 1.2M followers, 176K engagements
"GCSE Chemistry - Concentration Calculations (grams per dm) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The formula for calculating the concentration of a solution. * How to use the formula triangle to calculate concentration mass or volume. * The standard units used: grams (g) for mass and decimetres cubed (dm) for volume. [--]. How to convert between different units for volume. * Converting from centimetres cubed (cm) to decimetres cubed (dm). [--]. Worked examples demonstrating how to calculate concentration in g/dm. [--]. A worked example showing how to"
[YouTube Link](https://youtube.com/watch?v=rluAIfmi7x8) 2025-07-02T14:15Z 1.2M followers, 23.1K engagements
"GCSE Biology - Active Transport (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Explanation of Active Transport [--]. Comparison Between Active Transport and Diffusion [--]. Active Transport in Plant Root Hair Cells * Mechanism for absorbing mineral ions from the soil. * Necessity due to lower mineral concentration in soil. * Key adaptations of root hair cells for active transport. *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone"
[YouTube Link](https://youtube.com/watch?v=tM0bGaaQ2jY) 2022-02-27T10:00Z 1.2M followers, 552K engagements
"How are Proteins Made Transcription & Translation Find revision notes questions flashcards and more: https://cognitoedu.link/biology_protein_synthesis *** WHAT'S COVERED *** [--]. Introduction to Protein Synthesis [--]. Overview of the two main stages: Transcription and Translation. [--]. Messenger RNA (mRNA) * mRNA as a copy of a single gene. * Key structural differences between mRNA and DNA (length single strand Uracil vs Thymine). [--]. Transcription: Copying the Gene * The role of RNA Polymerase. * Complementary base pairing rules for mRNA synthesis. * Formation of the mRNA strand. [--]. Translation:"
[YouTube Link](https://youtube.com/watch?v=ubdoUqmNF98) 2020-03-15T10:00Z 1.2M followers, 1.7M engagements
"GCSE Maths - What are Cubic Graphs & How to Plot Them (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Recognising Cubic Graphs. [--]. Understanding Cubic Equations. * Definition & general form * How the sign of the x term affects the graph's overall shape. [--]. Plotting Cubic Graphs. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course (but very basic) *** CHAPTERS *** 0:00 Intro to Cubic Graphs 0:23"
[YouTube Link](https://youtube.com/watch?v=wCA1VskgTag) 2020-11-18T10:15Z 1.2M followers, 218.9K engagements
"GCSE Chemistry - Ionic Compounds - Structure Properties Formula (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The structure of ionic compounds * How ionic bonds form through electron transfer between metals and non-metals. * The formation of giant ionic lattice structures due to strong electrostatic forces. * Different ways to represent ionic compounds including dot-and-cross and ball-and-stick diagrams. [--]. The properties of ionic compounds * Why they have high melting and boiling points related to the energy needed to break strong ionic bonds. *"
[YouTube Link](https://youtube.com/watch?v=ybi6kQHKVws) 2025-06-16T14:27Z 1.2M followers, 92.1K engagements
"GCSE Physics - Alpha Beta & Gamma Radiation How Ionising & Penetrating They Are (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Isotopes and Radioactive Decay * An explanation of stable and unstable isotopes. * How unstable isotopes undergo radioactive decay to become more stable. [--]. The Four Types of Nuclear Radiation * A breakdown of the properties of the four main types of nuclear radiation. [--]. Alpha () Radiation * Its composition (a helium nucleus) charge ionising power and penetrating power. [--]. Beta () Radiation * Its composition (a high-speed"
[YouTube Link](https://youtube.com/watch?v=1ui5YnYkYpc) 2026-01-13T15:15Z 1.2M followers, 10K engagements
"GCSE Biology - The Nervous System Reflex Arcs Explained (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Role of the Nervous System * Need for communication and coordination in multicellular organisms. * Responding to internal and external surroundings. [--]. Structure and Function of Nerve Cells (Neurones) * Adaptations for transmitting electrical impulses (long thin branched connections). * The role of synapses in transmitting signals between neurones using chemicals. [--]. Organisation of the Nervous System * The Central Nervous System (CNS) comprising"
[YouTube Link](https://youtube.com/watch?v=BnsZo4j1YvU) 2025-04-04T16:17Z 1.2M followers, 164.5K engagements
"GCSE Physics - Parallel Circuits (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to parallel circuits * The definition of a parallel circuit as one with more than one loop. * The advantages of using parallel circuits over series circuits such as allowing other components to continue working if one fails. [--]. Potential difference in parallel circuits * The rule that the potential difference from the source is the same across all components in each parallel loop. [--]. Current in parallel circuits * How the total current from the source is"
[YouTube Link](https://youtube.com/watch?v=GIvE5Zlpea8) 2025-11-10T15:00Z 1.2M followers, 19.3K engagements
"GCSE Physics - Electromagnetism - Wires Coils Solenoids Electromagnets (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What is electromagnetism * How electric currents produce magnetic fields. [--]. Magnetic fields around different conductors. * The magnetic field around a straight current-carrying wire. * The magnetic field of a flat circular coil. * The magnetic field of a solenoid. [--]. The right-hand rule. * How to determine the direction of the magnetic field based on the current's direction. [--]. Electromagnets. * How a solenoid acts as an"
[YouTube Link](https://youtube.com/watch?v=LTfP8yPAVFw) 2025-12-12T15:15Z 1.2M followers, 18K engagements
"GCSE Maths - How to Write Expressions for the nth term of Arithmetic Sequences (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining arithmetic sequences. [--]. Understanding the nth term expression for an arithmetic sequence. [--]. How to use the nth term expression to calculate the value of any term in the sequence. [--]. A two-step method for finding the nth term expression: * Finding and using the common difference. * Finding and using the '0th' term. [--]. Worked examples for sequences with positive negative and decimal common differences. [--]. How to check"
[YouTube Link](https://youtube.com/watch?v=RAjTpz3yQ3Q) 2020-08-20T09:15Z 1.2M followers, 736.7K engagements
"A-Level Biology - Carbohydrates: Polysaccharides - Starch Glycogen Cellulose (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What polysaccharides are * Definition as complex carbohydrates made from monosaccharides. * Examples: starch glycogen and cellulose. * Key functions: energy storage and structural support. [--]. The structure and function of starch * The two forms of starch: amylose (unbranched) and amylopectin (branched). * Made from alpha-glucose monomers with 1-4 and 1-6 glycosidic bonds. * How its properties make it suitable for storing glucose"
[YouTube Link](https://youtube.com/watch?v=S4T4KVTSGdA) 2025-10-06T14:30Z 1.2M followers, 15.4K engagements
"GCSE Biology - DNA Part [--] Chromosomes & Genome (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. DNA and Chromosomes * Definition and double helix structure of DNA (Deoxyribonucleic Acid). * How long strands of DNA are coiled up to form structures called chromosomes. * The number of chromosomes in human body cells (46 chromosomes arranged in [--] pairs). * How sex is determined by the 23rd chromosome pair (XX for female XY for male). * The appearance of chromosomes before cell division. [--]. Genes * Definition of a gene as a small section of DNA on a"
[YouTube Link](https://youtube.com/watch?v=fy2F8yFxqOI) 2025-04-11T14:36Z 1.2M followers, 115.6K engagements
"Types of bonds: Ionic + Metallic + Covalent GCSE Study Exam STEM Science School AP IB Alevel Chemistry Physics Biology GCSE Study Exam STEM Science School AP IB Alevel Chemistry Physics Biology"
[YouTube Link](https://youtube.com/watch?v=gTQspZGTEAc) 2025-12-05T15:01Z 1.2M followers, 26.3K engagements
"GCSE Physics - Terminal Velocity - What Affects Air Resistance Resultant Force & Acceleration Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of terminal velocity. * Definition as the constant velocity reached by a falling object when forces are balanced. [--]. Forces acting on a falling object. * The constant downward force of weight due to gravity. * The variable upward force of air resistance (drag). [--]. The stages of reaching terminal velocity. * Initial acceleration when weight is greater than air resistance. * How increasing velocity leads to increased"
[YouTube Link](https://youtube.com/watch?v=k3AYX5INJ_4) 2025-09-23T14:15Z 1.2M followers, 33.1K engagements
"GCSE Physics - Density - Equation How to Calculate Density Experimentally (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of density * Defining density as the mass per unit of volume. * The formula for calculating density: Density = Mass / Volume. [--]. Units of density * Standard units (kilograms per metre cubed kg/m). * Common alternative units (grams per centimetre cubed g/cm). * How to convert between different units of density. [--]. Calculating density mass and volume * A worked example showing how to rearrange the density equation to"
[YouTube Link](https://youtube.com/watch?v=m2P2DdfebiU) 2025-12-17T15:15Z 1.2M followers, [----] engagements
"GCSE Maths - What on Earth is y = mx + c (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The standard form for equations of straight lines on graphs: y = mx + c. [--]. Understanding the components of y = mx + c. * 'm' represents the gradient of the line. * 'c' represents the y-intercept. [--]. Identifying the gradient and y-intercept directly from an equation in the form y = mx + c. [--]. Sketching a straight line graph using its gradient and y-intercept. [--]. How to rearrange linear equations that are not initially in the form y = mx + c. [--]. Interpreting"
[YouTube Link](https://youtube.com/watch?v=nUk47WSiS30) 2020-10-07T09:15Z 1.2M followers, 826.3K engagements
"Ventilation Mechanism How Breathing Works Inspiration & Expiration (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The difference between ventilation and respiration. * Ventilation is the physical process of moving air in and out of the lungs (breathing). * Respiration is the chemical process in cells that releases energy. [--]. The key structures involved in the mechanism of breathing. * The roles of the ribcage lungs diaphragm and thoracic cavity. * The function of the external and internal intercostal muscles. [--]. The relationship between gas volume and"
[YouTube Link](https://youtube.com/watch?v=rsA-4TroH6Y) 2025-12-11T15:15Z 1.2M followers, [----] engagements
"A-Level Biology - Meiosis - Stages Differences to Mitosis (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. An introduction to meiosis. * The definition of meiosis as a type of cell division. * The role of meiosis in producing four genetically different haploid cells (gametes). * The process of DNA replication and the formation of sister chromatids before meiosis begins. [--]. The stages of Meiosis I. * Prophase I: Homologous chromosomes pair up. * Metaphase I: Homologous pairs align at the cell's equator. * Anaphase I: Homologous chromosomes are separated."
[YouTube Link](https://youtube.com/watch?v=vJjuJInJ6-Y) 2025-12-05T15:30Z 1.2M followers, [----] engagements
"GCSE Physics - Acceleration - Rate of Change in Velocity Equations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of acceleration as the rate of change in velocity. [--]. How to calculate acceleration using the formula a = (v - u) / t. * Includes a worked example of a car accelerating. [--]. Acceleration as a vector quantity. * Discusses negative acceleration (deceleration). * The difference between average and uniform (constant) acceleration. [--]. An alternative formula for acceleration: v - u = 2as. * Useful for questions involving distance"
[YouTube Link](https://youtube.com/watch?v=ysda01Y8PgE) 2025-09-19T14:15Z 1.2M followers, 34.4K engagements
"GCSE Physics - Particle Theory & States of Matter Solids Liquids & Gases (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to the three states of matter and the particle theory model. [--]. Properties of solids based on particle arrangement and forces of attraction. * The process of melting. [--]. Properties of liquids based on particle arrangement and forces of attraction. * The processes of boiling and evaporation. [--]. Properties of gases based on particle arrangement and forces of attraction. * Understanding the random motion of gas particles."
[YouTube Link](https://youtube.com/watch?v=zjkBMk5d3tM) 2025-12-16T15:15Z 1.2M followers, 10.7K engagements
"Atoms & Ions Protons Neutrons Electrons Check out our website https://www.cognito.org/ This video is suitable for: - All tiers - All exam boards - Triple and combined science *** WHAT'S COVERED *** [--]. Introduction to Atoms * The fundamental nature of atoms as the particles constituting all matter. * The vast quantity of atoms present in everyday materials including biological cells. [--]. Atomic Structure Overview * The main components of an atom: a central nucleus and orbiting electrons. * The arrangement of electrons in shells or energy levels around the nucleus. [--]. Subatomic Particles"
[YouTube Link](https://youtube.com/watch?v=zuQ469vjwgo) 2025-05-25T15:17Z 1.2M followers, 264K engagements
"GCSE Chemistry - Factors Affecting the Rate of Reaction This video covers: - Collision theory and how it relates to the rate of reaction - The effect of temperature - The effect of concentration and pressure - The effect of surface area - The effect of catalysts"
[YouTube Link](https://youtube.com/watch?v=-4HXaUBbv04) 2019-04-08T13:10Z 1.1M followers, 819.4K engagements
"GCSE Chemistry - Relative Formula Mass Mr & Percentage Mass Calculations https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Relative Atomic Mass (Ar) * The difference between Mass Number and Relative Atomic Mass. * How Ar is the average mass of an element's isotopes. [--]. Relative Formula Mass (Mr) * How to calculate the Mr of a compound by adding the Ar of all its atoms. * Worked example: calculating the Mr of Magnesium Chloride. * Worked example: calculating the Mr of Sulfuric Acid. [--]. Percentage Mass of an Element in a Compound * The formula for calculating the percentage mass of an element."
[YouTube Link](https://youtube.com/watch?v=-I2mwJH6MhA) 2025-06-25T14:15Z 1.1M followers, [---] engagements
"A-Level Biology - Proteins: Amino Acids Dipeptides How to Test for Proteins (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure and Functions of Proteins * How amino acid monomers join to form dipeptides and polypeptides. * An overview of key functions including enzymes antibodies transport proteins structural components hormones and muscle fibres. [--]. The Structure of Amino Acids * The general chemical structure of an amino acid including the central carbon amino group carboxyl group and the variable R group. * An explanation of how the R"
[YouTube Link](https://youtube.com/watch?v=-MBxTdbBAT4) 2025-10-15T14:30Z 1.1M followers, [---] engagements
"GCSE Biology - Plant Hormones - Uses of Auxin Gibberellin and Ethene #53 This video covers: - How we can use plant hormones to control growth in plants - How we can use Auxins to stimulate plants to grow or kill weeds - Uses of Gibberellin to control dormancy induce flowering and grow larger fruit - How we can use ethene to control the ripening of fruit Exam board specific info: AQA - Separate/triple and higher tier only IGCSE Edexcel - Not in your course Edexcel - Separate/triple and higher tier only OCR 21st Century - Separate/triple and higher tier only OCR Gateway - Separate/triple and"
[YouTube Link](https://youtube.com/watch?v=0GTVp0iaes8) 2023-10-23T00:11Z 583K followers, 100.6K engagements
"GCSE Physics - What is Pressure This video covers: - What pressure is - How to calculate it using the equation: p = F/A General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel - Triple (separate) science only OCR 21st Century - Triple (separate) science only OCR Gateway - Triple (separate) science only GCSE Chemistry"
[YouTube Link](https://youtube.com/watch?v=0P3b8bWqAkc) 2019-11-21T14:57Z 1.1M followers, 441.2K engagements
"GCSE Maths - Parallel Lines https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Parallel Lines [--]. Identifying the Gradient of a Line * Using the standard equation y = mx + c where m is the gradient. * Rearranging equations into the y = mx + c format before finding the gradient. [--]. Finding the Equation of a Line Parallel to Another *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course *** CHAPTERS *** 0:00 Intro: What are Parallel"
[YouTube Link](https://youtube.com/watch?v=0SD0z2VMS7M) 2020-11-01T09:45Z 1.1M followers, 73.1K engagements
"GCSE Physics - Ultrasound - Prenatal Scanning Industrial Imaging Sonar (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of ultrasound * Sound waves with frequencies above [-----] Hz beyond the range of human hearing. * How ultrasound waves are produced using electrical devices. [--]. The principle of how ultrasound imaging works * Explanation of partial reflection at boundaries between different media. * How reflected waves are detected and used to calculate distances to create an image. [--]. Applications of ultrasound technology * Prenatal"
[YouTube Link](https://youtube.com/watch?v=0_hd08yYoXY) 2025-10-15T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - How Human Waste Reduces Biodiversity - Explained We explain what you need to know about how biodiversity suffers as a result of human activity"
[YouTube Link](https://youtube.com/watch?v=0lUHnS-8kR4) 2019-01-25T13:39Z 1M followers, 119.8K engagements
"GCSE Biology - Biotic and Abiotic Factors An important part of any ecosystem are the biotic (living) and abiotic (non-living) factors. This video explore what each of them are and how to identify them. To learn more about ecosystems in general check out our other video on interdependence community and competition: https://www.youtube.com/watchv=XVD5izWXmKo"
[YouTube Link](https://youtube.com/watch?v=0mjafH5pVLA) 2019-01-21T13:09Z 1M followers, 412.7K engagements
"A-Level Biology - Carbohydrates: Monosaccharides & Disaccharides (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What carbohydrates are * The elemental composition of carbohydrates (carbon hydrogen and oxygen). * The main functions of carbohydrates in living organisms including energy supply energy storage structural components and cellular recognition. * An introduction to the three main types of carbohydrates: monosaccharides disaccharides and polysaccharides. [--]. An overview of monosaccharides * Definition of monosaccharides as simple sugars. * How"
[YouTube Link](https://youtube.com/watch?v=1ibWOa-S4bI) 2025-10-03T14:30Z 1.1M followers, [----] engagements
"GCSE Chemistry - Reactivity Series of Metals & Displacement Reactions When metals react they lose their outermost electrons. This video covers which metals are the most and least reactive & also how we can determine reactivity by reacting them with acids and water. Then at the end we cover displacement reactions of metals"
[YouTube Link](https://youtube.com/watch?v=2i5Lm7BMtpo) 2019-03-14T14:11Z 1.1M followers, 672.8K engagements
"A Level Biology - Carbohydrates: Monosaccharides & Disaccharides Practice this content on our platform: www.Cognitoedu.org In this video we cover: [--]. What carbohydrates are [--]. What monosaccharides are [--]. And finally what disaccharides are as well as how theyre formed & broken down This video is suitable for the following A Level courses: AQA OCR CIE (content relevant to almost all similar courses) Chapters: 0:00 Introduction 0:23 [--] Types of Biological Molecule 1:41 Monomers & Polymers 2:56 Lipids Are Not Polymers 3:17 Condensation & Hydrolysis Reactions A Level Biology playlist:"
[YouTube Link](https://youtube.com/watch?v=2xDhjHxP688) 2025-03-04T15:46Z 979K followers, [----] engagements
"GCSE Biology - Selective Breeding Selective breeding is the process of choosing the best animals and plants and breeding them together in the hope of getting even better offspring. Learn how it all works and why we do it in this video"
[YouTube Link](https://youtube.com/watch?v=3B4LEssKSLs) 2019-01-11T13:21Z 1M followers, 247.9K engagements
"GCSE Biology - Exercise & Oxygen Debt (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Energy requirements during exercise. * Increased cellular respiration for muscle contraction. [--]. How the body increases oxygen supply. * Changes in breathing rate and volume. * Changes in heart rate. [--]. Aerobic and anaerobic respiration in muscles. * Conditions leading to anaerobic respiration. [--]. Lactic acid and oxygen debt. * Production of lactic acid during anaerobic respiration. * Muscle fatigue. * Repayment of oxygen debt and removal of lactic acid via the liver."
[YouTube Link](https://youtube.com/watch?v=3QIvixsepLI) 2025-03-05T15:13Z 1.1M followers, 47.3K engagements
"GCSE Biology - Inherited Disorders Polydactyly Cystic Fibrsosis https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Inherited Disorders * Definition as conditions passed on via alleles from parents. [--]. Polydactyly * Condition resulting in extra fingers or toes. * Caused by a dominant allele. * Explanation of inheritance using a genetic diagram (heterozygous x homozygous recessive cross). * Calculating probability of inheritance. [--]. Cystic Fibrosis * Disorder of cell membranes causing thick sticky mucus. * Affects lungs and pancreas primarily. * Caused by a recessive allele. * Explanation of"
[YouTube Link](https://youtube.com/watch?v=3XhzsN8TpTI) 2025-04-23T15:13Z 1.1M followers, [----] engagements
"How to Add and Subtract Fractions https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to add and subtract fractions. [--]. Worked examples demonstrating fraction addition and subtraction. * Includes handling improper fractions. * Includes converting mixed numbers to improper fractions before calculating. * Simplifying the final fraction answer where necessary. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Intro & Key Rules 0:32 Example [--] 2:40 Example [--] 4:18 Example [--] 5:37 Example [--] *** PLAYLISTS ***"
[YouTube Link](https://youtube.com/watch?v=3fY1AqnrUhQ) 2020-04-20T09:15Z 1.1M followers, 119.2K engagements
"GCSE Biology - Deforestation & Land Use https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The importance and diverse human uses of land as a finite resource. * Examples of land use: building towns and cities quarrying farming and waste disposal. * Consequences of human land use: reduced land availability for other organisms and environmental damage. [--]. Deforestation: the process of clearing forests. * Primary reasons: clearing land for agriculture (cattle ranching crop cultivation including rice and biofuels) and logging for timber and fuel. * Key environmental impacts: reduction in"
[YouTube Link](https://youtube.com/watch?v=40o6Py7W1rs) 2025-05-19T15:37Z 1.1M followers, [----] engagements
"GCSE Physics - Reducing Energy Loss - Insulation / Lubrication / Aerodynamics In this video we cover: - How we reduce heat loss from homes - How cavity walls work - How double glazing works - How to reduce friction using lubrication - Why vehicles are streamlined General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - You also need to know about Sankey diagrams Edexcel - You also need to know about Sankey diagrams OCR 21st Century - You also need to know about Sankey diagrams OCR Gateway - Everything is"
[YouTube Link](https://youtube.com/watch?v=43XCqAN53Sg) 2019-06-27T12:21Z 1.1M followers, 272.6K engagements
"GCSE Biology - Osmosis #8 In this video you'll learn: - What osmosis is - Some examples of osmosis in the blood"
[YouTube Link](https://youtube.com/watch?v=4Eq8rO3fABM) 2018-10-12T12:56Z 630K followers, 404.1K engagements
"GCSE Chemistry - Allotropes - Graphene and Fullerenes This video covers the structure and uses of graphene and fullerenes - like nanotubes and the buckminsterfullerene. Remember allotropes are different structural forms of the same element in the same physical state. You can see our video on the other carbon allotropes here: https://www.youtube.com/watchv=tGH0mXCcEFU"
[YouTube Link](https://youtube.com/watch?v=4ZEtS5qLOHs) 2019-02-22T12:07Z 1.1M followers, 299.5K engagements
"GCSE Physics - Internal Energy and Specific Heat Capacity This video covers: - What internal energy is - Relationship between kinetic energy internal energy and temperature - What specific heat capacity is - How to use specific heat capacity in an equation General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel -"
[YouTube Link](https://youtube.com/watch?v=4rT7-5yE4pQ) 2019-10-06T09:46Z 1.1M followers, 484.9K engagements
"GCSE Chemistry - Covalent Bonding This video covers how covalent bonding works how to show it with dot and cross diagrams and the types of substances that covalent bonds can form"
[YouTube Link](https://youtube.com/watch?v=5I_1jRGSR9E) 2019-02-19T15:03Z 1.1M followers, 1.2M engagements
"How to Add or Subtract Numbers in Standard Form (Part 4/4) https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to add and subtract numbers written in standard form without using a calculator. [--]. Converting numbers in standard form to have the same power of [--]. [--]. Ensuring the final answer is correctly written in standard form. [--]. Worked examples including: * Addition and subtraction. * Cases where powers are initially the same. * Cases where powers are initially different (including positive and negative powers). * Cases where the initial result needs conversion back into standard form."
[YouTube Link](https://youtube.com/watch?v=5iGgvtBDKKk) 2020-06-04T09:45Z 1.1M followers, 189.9K engagements
"GCSE Biology - Immune System (Defences Against Pathogens) #38 In this video we take a look at our bodies defences against pathogens. Including the physical and chemicals barriers and our immune system"
[YouTube Link](https://youtube.com/watch?v=63XExOKWrqg) 2018-12-06T14:43Z 936K followers, 402.8K engagements
"GCSE Chemistry - What is Ionic Bonding How Does Ionic Bonding Work Ionic Bonds Explained Everything you need to know about ionic bonding Ionic bonds form when one atom transfers electron/s to another atom so that both atoms forms oppositely charged ions. These ions are then attracted to each other by electrostatic forces which we call an ionic bond. The video is based on the AQA 9-1 GCSE course but is suitable for all exam boards and for both combined and triple/separate science"
[YouTube Link](https://youtube.com/watch?v=6DtrrWA5nkE) 2019-02-15T14:03Z 1.1M followers, 1.3M engagements
"GCSE Physics - Seismic Waves - P-waves & S-waves (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Seismic Waves * P-waves (Primary waves) are longitudinal and can travel through solids and liquids. * S-waves (Secondary waves) are transverse and can only travel through solids. [--]. Earth's Internal Structure * How scientists use seismometers to detect waves and analyse their paths. * The behaviour of seismic waves including reflection and refraction as they travel through different layers of the Earth. [--]. Evidence from Seismic Waves * How the paths of"
[YouTube Link](https://youtube.com/watch?v=6G7glidXTcQ) 2025-10-16T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - Factors Affecting the Rate of Photosynthesis Limiting Factor Graphs https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Factors affecting the rate of photosynthesis. * Light intensity. * Temperature. * Carbon dioxide concentration. * Amount of chlorophyll. [--]. The role of chlorophyll in photosynthesis. * Factors affecting chlorophyll levels (disease environment nutrients). [--]. Limiting factors for photosynthesis. * How light intensity carbon dioxide and temperature limit the rate. * Graphical representation of limiting factors. * Explanation of graph shapes (initial increase"
[YouTube Link](https://youtube.com/watch?v=6sLrh-SDv_Y) 2025-03-26T15:38Z 1.1M followers, 34.8K engagements
"GCSE Chemistry - Nanoparticles This video covers: - What nanoparticles are and why they're useful - The uses of nanoparticles e.g. as catalysts in nano-medicine and in electrical circuits - The risks of nanoparticles - How silver particles are used in suncreams and the possible health risks Exam board specific info: AQA - This video is only for the separate/triple science course IGCSE Edexcel - Not in your course Edexcel - This video is only for the separate/triple science course OCR 21st Century - Everything is relevant to your course OCR Gateway - This video is only for the separate/triple"
[YouTube Link](https://youtube.com/watch?v=70dOzvhn-8M) 2020-01-16T13:00Z 984K followers, 211.6K engagements
"GCSE Chemistry - History of the Atom #6 **For the updated video - please click link below**: https://www.youtube.com/watchv=sG6QoLxwIw4&t"
[YouTube Link](https://youtube.com/watch?v=7MUA_yL5GDo) 2019-02-08T14:53Z 628K followers, 155.5K engagements
"GCSE Maths - Expanding Triple Brackets https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Expanding triple brackets. [--]. Step-by-step worked examples of expanding triple brackets. [--]. Demonstration that the order in which brackets are multiplied does not change the final answer. *** EXAM BOARD INFO *** KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro: What Are Triple Brackets 0:25 Overview of Method 1:01 Example [--] 3:03 Example [--] *** PLAYLISTS ***"
[YouTube Link](https://youtube.com/watch?v=7PmCEF0_Yrk) 2020-06-24T09:00Z 1.1M followers, 152.8K engagements
"GCSE Physics - Efficiency In this video we cover: - The idea that devices aren't 100% efficient - What efficiency is - The equation for efficiency - Examples of how to calculate efficiency - Why some devices like electric heaters are sometimes considered to be 100% efficient General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant"
[YouTube Link](https://youtube.com/watch?v=7hcv_mxcA-g) 2019-07-03T12:26Z 1.1M followers, 439K engagements
"GCSE Physics - Electromagnetic Waves In this video we cover the following: - The [--] different types and order of the waves in the electromagnetic spectrum - The phrase ROYGBIV to help you remember the order of colours in the visible light spectrum - The inverse relationship between wavelength and frequency as you move through the spectrum - What sort of things emit these waves - That when waves contact with an object they can be reflected absorbed or transmitted - or some combination of the three"
[YouTube Link](https://youtube.com/watch?v=7v2gs8rdQzU) 2019-12-29T15:00Z 1.1M followers, 849.3K engagements
"GCSE Biology - What Is Blood Made of / What Does Blood Do #25 Ever wondered what your blood is made of Red blood cells white blood platelets and plasma Learn what each of these components does and how we can replace it with artificial blood"
[YouTube Link](https://youtube.com/watch?v=81w0BXg7QJA) 2018-11-21T13:06Z 743K followers, 336.4K engagements
"GCSE Chemistry - Addition Reactions of Alkenes https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Alkenes [--]. Addition Reactions of Alkenes [--]. Specific Addition Reactions * Reaction with Hydrogen (Hydrogenation). * Reaction with Water (Steam/Hydration). * Reaction with Halogens. [--]. Test for Alkenes *** EXAM BOARD INFO *** AQA - Separate/triple science only IGCSE Edexcel - Everything is relevant to your course Edexcel - Separate/triple science only OCR 21st Century - Separate/triple science only OCR Gateway - Separate/triple science only *** CHAPTERS *** 0:00 Introduction to"
[YouTube Link](https://youtube.com/watch?v=83Is-rouV-U) 2020-02-27T13:00Z 1.1M followers, 403.7K engagements
"GCSE Maths - Types of Number Sequences - Arithmetic vs Geometric https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Number Sequences. [--]. Arithmetic Sequences. [--]. Geometric Sequences. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro to Number Sequences 0:15 Example 1: Finding the Pattern (Adding) 0:49 Example 2: Finding the Pattern (Subtracting) 1:12 Arithmetic Sequences & Common Difference 1:56 Geometric Sequences 2:09"
[YouTube Link](https://youtube.com/watch?v=871OBfK5o2M) 2020-08-18T09:00Z 1M followers, 161.4K engagements
"GCSE Physics - Elastic Potential Energy and F = ke Equations #45 This video covers: - How to use the F = ke equation - What the spring constant k really means (how stiff the object is) - How to use the EPE = [---] k e2 equation (EPE is elastic potential energy) - That the gradient of a force-extension graph is k - That the area under the curve of a force-extension graph is EPE Remember that extension is sometimes represented as an 'x' rather than as an 'e'. General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined"
[YouTube Link](https://youtube.com/watch?v=8Z8jUW03z3s) 2019-11-14T13:02Z 872K followers, 206.1K engagements
"GCSE Physics - Ultrasound https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Ultrasound [--]. How Ultrasound Works * Generation using electrical devices. * Partial reflection at boundaries between different mediums. [--]. Applications of Ultrasound * Pre-natal scanning for foetal imaging. * Industrial imaging to detect internal flaws in materials. * Sonar for measuring distances underwater. [--]. Calculations with Ultrasound *** EXAM BOARD INFO *** AQA - Separate/triple science and higher tier only IGCSE Edexcel - Not really in your course Edexcel - Separate/triple science and higher"
[YouTube Link](https://youtube.com/watch?v=8ixr2NQF9Dg) 2020-03-04T13:00Z 1.1M followers, 183.1K engagements
"GCSE Chemistry - Fuel Cells https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Fuel Cells [--]. Structure of the Hydrogen-Oxygen Fuel Cell * Components: Electrolyte negative anode positive cathode. * Compartments inlets for hydrogen and oxygen and outlet for water. [--]. How Hydrogen-Oxygen Fuel Cells Work [--]. Chemical Equations * Half equation at the anode (oxidation of hydrogen). * Half equation at the cathode (reduction of oxygen). * Overall balanced chemical equation for the reaction. [--]. Pros and Cons of Hydrogen-Oxygen Fuel Cells *** EXAM BOARD INFO *** AQA - Separate/triple"
[YouTube Link](https://youtube.com/watch?v=8xeB_O_fyzM) 2020-02-20T12:45Z 1.1M followers, 409.8K engagements
"GCSE Biology - Transport in plants - Translocation (Phloem) and Transpiration (Xylem) #51 Learn how plants transport sugars via the phloem (translocation) and water via the xylem (transpiration) between the roots and leaves. We also cover the factors that affect the rate of transpiration: light intensity temperature humidity and air flow"
[YouTube Link](https://youtube.com/watch?v=9FTafxnbwHQ) 2018-11-29T13:05Z 869K followers, 752.7K engagements
"GCSE Physics - Liquid Pressure & Upthrust This video covers: - How water creates pressure - How to calculate the pressure of a submerged object (P = hpg) - What determines if something floats or sinks - What upthrust is General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Separate science (triple) and higher tier only IGCSE Edexcel - You don't need to know about upthrust but everything else in suitable for everyone"
[YouTube Link](https://youtube.com/watch?v=9Gw0rlXn6ec) 2019-11-24T13:59Z 994K followers, 218.9K engagements
"IMPORTANT - The Cognito Platform Has Launched https://cognitoedu.org - Today we officially launched the Cognito platform. The platform's been designed to make your learning and revision as quick and easy as possible. All your progress is automatically tracked so you can immediately see what you need to learn and all the content is delivered in a straight-forward no-fluff way. We really hope this helps you out and if you could do us a favour by letting everyone know it exists we'd be really grateful. Thank you so much for your support and if you have any feedback please let us know. We read"
[YouTube Link](https://youtube.com/watch?v=9PbLiKX_2PA) 2021-10-03T09:00Z 1.1M followers, 530.3K engagements
"GCSE Physics - Introduction to Energy Sources In this video we cover: - How our sources of energy have changed throughout human history - Where we use most of our energy today i.e. transport and domestic - How renewable is our electricity (spoiler alert. not very) General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your"
[YouTube Link](https://youtube.com/watch?v=AOhQ4gj4Ng8) 2019-07-06T07:47Z 1.1M followers, 336.1K engagements
"GCSE Physics - Components This video covers: - The symbols of all the main components you need to know - What LEDs are - The graphs and uses of LDRs and thermistors General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=AQawCNla5Fg) 2019-09-17T12:54Z 992K followers, 241.3K engagements
"GCSE Biology - What is Cancer 'Benign' and 'Malignant' Tumours Explained Benign and malignant tumours are very different problems. In fact only malignant ones are considered tumours. Find out why and explore the risk factors for cancer"
[YouTube Link](https://youtube.com/watch?v=B5VHRKBI4PY) 2018-11-27T13:08Z 985K followers, 155.3K engagements
"GCSE Maths - Congruent Shapes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Congruent Shapes. [--]. Identifying Congruent Shapes. [--]. Worked Examples: * Identifying shapes congruent to a given shape. * Finding pairs of congruent shapes from a selection. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - Not in your course *** CHAPTERS *** 0:00 Intro & Definition 0:31 Example 1: Identifying Congruent Shapes"
[YouTube Link](https://youtube.com/watch?v=B88GrkqbPCQ) 2021-03-28T09:30Z 1.1M followers, 60.3K engagements
"GCSE Biology - Genetic Diagrams Punett Squares https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Genetic Diagrams * Showing combinations of alleles from two parents. [--]. Representing Alleles * Using letters (capital for dominant lowercase for recessive). * Example gene: mouse muscularity (Normal vs Muscular). [--]. How to Draw Genetic Diagrams (5 Key Steps) * Parents' phenotype and genotype. * Gametes' genotype. * Offsprings' genotype and phenotype. [--]. Example 1: Crossing Homozygous Parents * Homozygous normal (AA) crossed with homozygous muscular (aa). * Determining gametes and"
[YouTube Link](https://youtube.com/watch?v=BtPo9F-nkho) 2025-04-22T14:47Z 1M followers, [----] engagements
"GCSE Biology - Endocrine System & Hormones The endocrine system is a collection of glands that secrete hormones. Learn all about the different glands you need to know and how hormones work"
[YouTube Link](https://youtube.com/watch?v=BvpPCn1rwsw) 2018-12-20T13:50Z 1M followers, 708.5K engagements
"GCSE Chemistry - Bond Energies - Determining if Reactions are Exothermic or Endothermic https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Bond Energy * The definition of bond energy as the energy required to break one mole of a particular covalent bond. * How bond breaking is an endothermic process that requires energy from the surroundings. * How bond formation is an exothermic process that releases energy to the surroundings. [--]. Calculating Overall Energy Change * The principle of comparing the energy needed to break bonds in the reactants with the energy released when forming bonds in the"
[YouTube Link](https://youtube.com/watch?v=CegXaqWMyr4) 2025-07-17T14:15Z 1.1M followers, [---] engagements
"GCSE Physics - Newtons Third Law This video covers: - Newton's third law - How it relates to the F=ma equation - The idea that the smaller mass is the one more likely to move General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=DpQ_ikFKru0) 2019-12-12T14:52Z 1.1M followers, 223.9K engagements
"GCSE Biology - Adaptations Structural Behavioural Functional https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Why organisms need to be adapted to their environment to survive. [--]. The three types of adaptations explained: * Structural adaptations (physical features like shape colour). * Behavioural adaptations (how an organism acts or behaves e.g. migration cooling techniques). * Functional adaptations (internal body processes like metabolism water conservation). [--]. Examples illustrating each type of adaptation in various animals (e.g. polar bears owls seals walruses elephants swallows"
[YouTube Link](https://youtube.com/watch?v=DycQKyb5IP4) 2025-04-29T14:12Z 1M followers, [----] engagements
"GCSE Chemistry - Electron Arrangement This video covers: 0:43 - The number of electrons per energy level 4:24 - why atoms react / why they lose or gain electrons This video is suitable for: - All tiers - All exam boards - Triple and combined science Related videos/topics: GCSE Chemistry playlist: https://www.youtube.com/watchv=fN8kH9Vvqo0&list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W GCSE Biology Playlist: https://www.youtube.com/watchv=--dIBinUdeU&list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g GCSE Physics Playlist: https://www.youtube.com/watchv=aHVJfRxeAxo&list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7"
[YouTube Link](https://youtube.com/watch?v=EBKwG25hRPE) 2019-02-06T21:57Z 1.1M followers, 464.1K engagements
"GCSE Physics - Momentum Part [--] of [--] - Conservation of Momentum Principle This video covers: - What momentum is - How to calculate the momentum of an object - The idea that momentum is a vector quantity - What 'the conservation of momentum principle' is - A worked example of how you can use the conservation of momentum principle to work out unknown momentum or velocity values General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific"
[YouTube Link](https://youtube.com/watch?v=F8DnNqBhUfQ) 2019-12-17T15:00Z 1.1M followers, 671.5K engagements
"GCSE Chemistry - Alkanes: properties & combustion In this video you'll learn: - The properties of alkanes and the specific trends you can observe as the length of carbon chain increases - The equation for the combustion of alkanes - How to write balanced equations for the combustion of alkanes with two worked examples"
[YouTube Link](https://youtube.com/watch?v=F8J2FirbIxg) 2019-04-24T12:30Z 1.1M followers, 484K engagements
"GCSE Physics - Elasticity spring constant and Hooke's Law This video covers: - The types of elasticity (compress stretch & bending) - The types of deformation (elastic & inelastic) - Hooke's Law - Idea of extension - Spring constant - Force-extension graphs General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century -"
[YouTube Link](https://youtube.com/watch?v=FAHOI32oAns) 2019-11-12T14:35Z 1.1M followers, 779.7K engagements
"A-Level Biology - Carbohydrates: Polysaccharides Starch Glycogen Cellulose (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What polysaccharides are. * Complex carbohydrates made from many monosaccharide units. * Monosaccharides are joined by glycosidic bonds. * Examples: Starch Glycogen Cellulose. * Functions: Energy storage and structural support. [--]. Structure and function of Starch. * Amylose: Unbranched chain of alpha-glucose (1-4 bonds) helical shape. * Amylopectin: Branched chain of alpha-glucose (1-4 and 1-6 bonds). * Function: Energy storage in"
[YouTube Link](https://youtube.com/watch?v=Fye7I8AaOSs) 2025-03-28T15:24Z 1.1M followers, 18.6K engagements
"GCSE Biology - The Menstrual Cycle & Puberty Hormones do many things in the body two very important roles are controlling puberty and the menstrual cycle. Learn how these work and which hormones are involved. The next two related videos will be on: [--] - Contraception [--] - Increasing fertility with hormones i.e. in vitro fertilisation"
[YouTube Link](https://youtube.com/watch?v=Gf_WLrXAqIA) 2018-12-30T13:04Z 1M followers, 531.4K engagements
"GCSE Physics - Conservation of Energy This video covers: - Conservation of energy principle - Open vs closes systems - Examples of how energy is transferred General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=H6D_ViW0Ch4) 2019-06-18T12:11Z 1.1M followers, 510.6K engagements
"GCSE Biology - Classification Correction: When discussing the relationship between different types of bear - we mention that pandas aren't a type of bear - BUT THEY ARE Woopsie. Sorry about that - we'll fix this in the future when we update these early biology videos :)"
[YouTube Link](https://youtube.com/watch?v=HLnaIJm5wM4) 2019-01-17T14:44Z 1M followers, 356.2K engagements
"GCSE Chemistry - Halogens and Noble Gases Learn all about the properties and trends of the group [--] (halogens) and group [--] (noble gases) elements. Including why halogens become less reactive as you go down the group and why noble gases are so unreactive. Suitable for: Combined and separate science All exam boards Paper 1"
[YouTube Link](https://youtube.com/watch?v=HT1zAPQIBAQ) 2019-02-13T16:01Z 1.1M followers, 577.1K engagements
"GCSE Biology - Nervous System and Reflex Arc In this video we cover what the nervous system is how it relies on nerve cells and synapses and what a reflex arc is"
[YouTube Link](https://youtube.com/watch?v=HiuXfbwND9s) 2018-12-19T13:18Z 1M followers, 896.6K engagements
"GCSE Chemistry - Le Chatelier's Principle (Higher Tier) This video covers: - Le Chatelier's Principle - i.e. the idea that when a change is made to a system at equilibrium the position of equilibrium moves to counteract the change that was made. - What happens when temperature is changed - What happens when pressure is changed - What happens when concentration is changed This video is suitable for: - Higher tier - All exam boards (in some exam boards they don't call it le Chatelier's principle but they do cover the same concepts) - Triple and combined science"
[YouTube Link](https://youtube.com/watch?v=IYyoncESnmQ) 2019-04-14T11:20Z 1.1M followers, 587.1K engagements
"GCSE Chemistry - Modern Periodic Table Learn who made the periodic table why he arranged the elements this way and about the important groups you need to know"
[YouTube Link](https://youtube.com/watch?v=IdS9roW7IzM) 2019-02-11T13:22Z 995K followers, 636K engagements
"GCSE Biology - Selective Breeding https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Selective Breeding * Breeding organisms with desirable characteristics to produce offspring with improved traits. [--]. History and Application * Use in agriculture (farming) for thousands of years. * Modern examples: high-yield cows disease-resistant crops domestic pets ornamental flowers. [--]. The Process of Selective Breeding * Selecting individuals with desired traits from existing stock. * Breeding these selected individuals together. * Repeating the process over many generations to enhance the"
[YouTube Link](https://youtube.com/watch?v=In6Rl3Q2THQ) 2025-04-25T14:09Z 1M followers, [----] engagements
"GCSE Physics - How to Draw Ray Diagrams https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Drawing ray diagrams for lenses. * Symbols for concave (diverging) and convex (converging) lenses. * Identifying the principal axis principal focus (F) and 2F points. [--]. Concave lens ray diagrams. * Rules for drawing incident and refracted rays. * Locating the virtual image. * Describing image characteristics. [--]. Convex lens ray diagrams. * Rules for drawing incident and refracted rays. * Locating the image for different object positions. * Describing image characteristics. *** EXAM BOARD INFO *** AQA -"
[YouTube Link](https://youtube.com/watch?v=JNp_-00-fxU) 2020-02-04T11:30Z 1.1M followers, 412.4K engagements
"A-Level Biology - Proteins: Structures - [--] Main Levels Bonds (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The four levels of protein structure and how they build upon each other. * Primary Structure: The sequence of amino acids in a polypeptide chain. * Secondary Structure: The coiling (alpha-helix) or folding (beta-pleated sheet) of the polypeptide chain. * Tertiary Structure: The further folding of the polypeptide chain into a unique 3D shape. * Quaternary Structure: The combination of two or more polypeptide chains. [--]. The different types of"
[YouTube Link](https://youtube.com/watch?v=KcMFFzDn2FE) 2025-10-16T14:30Z 1.1M followers, [---] engagements
"GCSE Physics - Visible Light and Colour https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Visible Light Spectrum * Acronym ROYGBIV. [--]. White and Black Light * White light as a combination of all wavelengths. * Black as the absence of light. [--]. How Object Colour is Determined * Interaction of light: absorption reflection transmission. [--]. Opaque Objects [--]. Transparent and Translucent Objects [--]. Colour Filters *** EXAM BOARD INFO *** AQA - Separate/triple science only IGCSE Edexcel - Don't need to know the details of this video only watch for general interest :) Edexcel - Separate/triple"
[YouTube Link](https://youtube.com/watch?v=KnIualWf6Rs) 2020-02-11T13:00Z 1.1M followers, 243.9K engagements
"GCSE Biology - Abiotic & Biotic Factors https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding Biotic Factors * Definition of biotic factors as the living components of an ecosystem that affect other organisms or shape the environment. * Examples including predation competition for resources or habitat the prevalence of disease and the availability of food. [--]. Understanding Abiotic Factors * Definition of abiotic factors as the non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. * Examples such as light intensity"
[YouTube Link](https://youtube.com/watch?v=KtsWPiG_0HM) 2025-05-06T14:53Z 1.1M followers, 15.2K engagements
"GCSE Physics - Acceleration This video covers: - What acceleration is - The [--] equations for calculating acceleration - Average and uniform acceleration - Example questions General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course GCSE"
[YouTube Link](https://youtube.com/watch?v=Kzx8GBTl5VM) 2019-12-01T14:50Z 1.1M followers, 475K engagements
"GCSE Biology - Diabetes Type [--] & Type [--] Diabetes https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The role of insulin in regulating blood glucose levels. * How insulin is released by the pancreas. * How insulin helps cells absorb glucose and convert it to glycogen. [--]. Type [--] Diabetes. * The cause: the pancreas failing to produce sufficient insulin. * Typical onset and lifelong nature. * Treatment through insulin injections diet and exercise management. * Factors affecting insulin dosage (diet and exercise). [--]. Type [--] Diabetes. * The cause: body cells becoming resistant to insulin. * Typical"
[YouTube Link](https://youtube.com/watch?v=L8_n6_1e-M8) 2025-04-03T15:02Z 1M followers, [----] engagements
"GCSE Chemistry - Limiting Reactants & Balanced Equations https://www.cognito.org/ *** BALANCING EQUATIONS VIDEO *** https://www.youtube.com/watchv=qquOFYOpdl0 *** WHAT'S COVERED *** [--]. The concept of limiting reactants. * The definition of a limiting reactant and a reactant in excess. * An explanation of how the limiting reactant determines the total amount of product that can be formed in a chemical reaction. [--]. How to perform calculations involving limiting reactants. * Identifying the limiting reactant in a given problem whether explicitly stated or implied. * A step-by-step method for"
[YouTube Link](https://youtube.com/watch?v=LTnhZvyOvFU) 2025-06-30T14:15Z 1.1M followers, [---] engagements
"GCSE Maths - Solving Algebraic Inequalities with [--] Inequality Signs (Inequalities Part 3) #58 This video covers how to solve equations that contain [--] inequality signs. For example how to get and unknown letter like x by itself. This is part [--] of our [--] part series on inequalities. Part [--] - Introduction to inequalities Part [--] - Solving Algebraic Inequalities - With [--] Inequality Sign Part [--] - Solving Algebraic Inequalities - With [--] Inequality Signs (this video) Part [--] - Inequalities on Graphs This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation -"
[YouTube Link](https://youtube.com/watch?v=L_AfY1Bqosk) 2020-09-03T09:00Z 870K followers, 131.5K engagements
"GCSE Physics - Radio Waves In this video we cover: - How radio waves can be transmitted using oscilloscopes transmitters and receivers - How the transmission of radio waves can be used to transfer information - The three different types of radio waves and how they're used Exam board specific info: AQA - Suitable for all courses IGCSE Edexcel - Suitable for all courses Edexcel - Suitable for all courses OCR 21st Century - Suitable for all courses OCR Gateway - Suitable for all courses GCSE Chemistry playlist: https://www.youtube.com/watchv=fN8kH9Vvqo0&list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W"
[YouTube Link](https://youtube.com/watch?v=Ldnh0XlMVc0) 2020-01-02T14:30Z 1.1M followers, 464.8K engagements
"GCSE Biology - Sexual vs Asexual Reproduction - What is Asexual Reproduction How do organisms reproduce Well it depends on the organism. We explore the two main types - sexual and asexual and consider the consequences of each. Cell cycle chromosomes and mitosis video: https://www.youtube.com/watchv=RHyZVmbiA78 Binary fission video: https://www.youtube.com/watchv=OAcz-tFGY0Y Meiosis video: https://youtu.be/micUPynqx9k"
[YouTube Link](https://youtube.com/watch?v=LgLkt02Hl9s) 2019-01-02T15:02Z 1M followers, 371.8K engagements
"GCSE Chemistry - Conservation of Mass Whether we look at the mass Mr or number of atoms the mass is always conserved in chemical reactions. However it may sometimes appear as if the mass changes if some of our reactants or products are gases. We can fix this problem though by doing our reactions in a sealed container. This video is suitable for: - Higher and Foundation tiers - All exam boards (although based on AQA) - Triple and combined science"
[YouTube Link](https://youtube.com/watch?v=M-De2IMayco) 2019-03-04T13:48Z 1.1M followers, 291.6K engagements
"GCSE Maths - How to Find the Area of a Triangle https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two main formulas for calculating the area of a triangle. [--]. How to identify the base (b) and vertical height (h) for the first formula. [--]. How to identify the two sides (a b) and the included angle (C) for the second formula. [--]. Solving problems where an extra step is needed before applying an area formula. * Using Pythagoras' theorem to find a missing side first. * Using the angle sum of a triangle (180) to find a missing angle first. *** EXAM BOARD INFO *** This video is suitable for"
[YouTube Link](https://youtube.com/watch?v=MBKmLYqjCLE) 2025-02-12T08:15Z 1.1M followers, 18.9K engagements
"GCSE Chemistry - Atom Economy https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to chemical reactions in industry. [--]. Definition and purpose of Atom Economy. [--]. The equation for calculating Atom Economy. [--]. Worked example calculating Atom Economy. * Calculating the Mr of reactants and the desired product. * Calculating the final percentage atom economy. [--]. Interpreting Atom Economy values. [--]. Example of a reaction with 100% Atom Economy [--]. Reasons why considering Atom Economy is important. * Economic factors. * Sustainability. * Environmental factors. [--]. Potential solutions for"
[YouTube Link](https://youtube.com/watch?v=MQXzW9BryAg) 2020-02-06T00:00Z 1.1M followers, 139.2K engagements
"GCSE Maths - How to Find the Midpoint of a Line https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the midpoint of a line segment. [--]. Method 1: Finding the midpoint visually on a graph. [--]. Method 2: Using the midpoint formula. [--]. Worked examples applying the midpoint formula. * Including examples with negative coordinates. * Representing answers as fractions or decimals. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-Level - All on your course ***"
[YouTube Link](https://youtube.com/watch?v=MpJUxVl_Egw) 2020-10-25T09:00Z 1.1M followers, 204.6K engagements
"GCSE Maths - What Are Simultaneous Equations https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding linear equations with two variables. * Why single linear equations with two variables have infinite solutions. * Examples of finding possible solution pairs (x y). [--]. Visualising linear equations on graphs. [--]. The concept of simultaneous equations. [--]. Introduction to the three methods for solving simultaneous equations. * Solving by plotting graphs. * Solving using the substitution method. * Solving using the elimination method. *** EXAM BOARD INFO *** This video is suitable for maths"
[YouTube Link](https://youtube.com/watch?v=N7Zk-FQ6YeA) 2020-09-15T08:45Z 1.1M followers, 180.7K engagements
"GCSE Physics - Visible & Ultraviolet Light - Characteristics Uses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Visible Light * The relationship between the colour of light and its wavelength. * How visible light is used for communication in optical fibres. * The process of transmitting encoded information using reflection in fibres. [--]. Ultraviolet (UV) Radiation * Common sources and effects of UV light including from the sun. * The scientific principle of fluorescence. * How fluorescent lights use fluorescence to produce visible light efficiently. *"
[YouTube Link](https://youtube.com/watch?v=N9yEWOlkDzI) 2025-10-08T14:15Z 1.1M followers, [---] engagements
"GCSE Chemistry - Fuel Cells - Structure How they Work Half Equations Pros & Cons https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The function of a fuel cell as an electrochemical cell. * Converting chemical energy from a fuel and oxygen into electrical energy. * An introduction to the common hydrogen-oxygen fuel cell. [--]. The structure of a hydrogen-oxygen fuel cell. * The roles of the negative anode and positive cathode. * The function of the electrolyte and porous carbon electrodes. [--]. The chemical reactions that generate electricity. * The oxidation of hydrogen at the anode. * The"
[YouTube Link](https://youtube.com/watch?v=NAYCRPyd4xU) 2025-07-22T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - Food Chains & Predator Prey Cycles #85 For ecosystems to function they need energy; and we can see how this energy moves through ecosystems with food chains. We also explore how the populations of predators and prey vary over time with predator prey cycles"
[YouTube Link](https://youtube.com/watch?v=NFTSm3D2xrM) 2019-01-23T13:59Z 865K followers, 141.7K engagements
"GCSE Chemistry - Development of the Periodic Table https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Dmitri Mendeleev's contribution to the periodic table * Its development in the mid-19th century * Prediction of new elements [--]. Basic structure and interpretation of the periodic table * Arrangement by increasing atomic number (number of protons) * Understanding information in element boxes (nuclear symbol atomic number mass number) [--]. Organisation into periods and groups * Periods as horizontal rows showing repeating property patterns * Groups as vertical columns with elements sharing"
[YouTube Link](https://youtube.com/watch?v=NVnnIjUbXNQ) 2025-06-04T14:12Z 1.1M followers, [----] engagements
"GCSE Chemistry - Nanoparticles - Uses Risks https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of nanoparticles * An explanation of their size (1-100 nanometres) * The field of nanoscience [--]. Key properties of nanoparticles * A high surface area to volume ratio and why this occurs [--]. The various uses of nanoparticles * As catalysts to speed up chemical reactions * In nanomedicine for targeted drug delivery (e.g. fullerenes) * For creating tiny electrical circuits and computer chips * The antibacterial properties of silver nanoparticles in surgical masks and wound dressings 4."
[YouTube Link](https://youtube.com/watch?v=NtRgKuNiQ-Y) 2025-06-24T14:15Z 1.1M followers, [----] engagements
"GCSE Maths - What Does Inversely Proportional Mean https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Inverse Proportionality. * Understanding the rate of change. [--]. Graphical Representation of Inverse Proportionality. * Recognising the characteristic downward-sloping curve. * Interpreting points on the graph in context. [--]. Algebraic Representation of Inverse Proportionality. * Expressing the relationship using the proportionality symbol. * Forming an equation using the constant of proportionality (k). * Using the inverse proportion equation to find unknown values. *** EXAM"
[YouTube Link](https://youtube.com/watch?v=OCZSFmHnNI4) 2021-01-20T10:30Z 1.1M followers, 288.5K engagements
"GCSE Biology - Control of Blood Glucose Concentration Learn how the body controls it's blood glucose concentration using the hormones insulin and glucagon. We'll also see how these two hormones interact in a negative feedback loop"
[YouTube Link](https://youtube.com/watch?v=OHrX3X3LGzI) 2018-12-21T14:12Z 1M followers, 512.8K engagements
"GCSE Physics - Geothermal Power This video covers: - What geothermal energy is - How it can be used to heat water or generate electricity - It's pros and cons General info: - Only relevant to AQA and IGCSE Edexcel Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Not relevant to your course :( OCR 21st Century - Not relevant to your course :( OCR Gateway - Not relevant to your course :("
[YouTube Link](https://youtube.com/watch?v=OPI-2B29btU) 2019-07-21T14:17Z 1.1M followers, 171.1K engagements
"GCSE Chemistry - Formation of Ions This video covers how atoms gain or lose electrons to form ions why they bother and how to tell which ion they'll become. Based on AQA course but suitable for all exam boards"
[YouTube Link](https://youtube.com/watch?v=PCZtnbxtXqE) 2019-02-15T13:02Z 1.1M followers, 549.9K engagements
"GCSE Chemistry - Potable Water In today's vid you'll learn: - What potable water is - How we can get it by treating fresh water sources - How we can get it by desalinating sea water"
[YouTube Link](https://youtube.com/watch?v=PDeiRlQvWnM) 2019-05-31T12:32Z 1.1M followers, 237.3K engagements
"GCSE Biology - Exercise & Oxygen Debt #22 This video covers the effects of exercise on the body including details about respiration and the oxygen debt"
[YouTube Link](https://youtube.com/watch?v=PthdswsrM3Y) 2018-12-17T13:20Z 872K followers, 286.9K engagements
"GCSE Physics - Geothermal Power - How it Works Pros & Cons https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The origin of geothermal energy * Thermal energy from the Earth's crust. * Sources include the initial formation of the planet and radioactive decay. [--]. How geothermal energy is harnessed * Used directly for heating homes by pumping water underground. * Used to generate electricity by converting underground water to steam to turn turbines. [--]. The advantages and disadvantages of geothermal power * Pros: renewable reliable and low pollution. * Cons: high building costs and only viable"
[YouTube Link](https://youtube.com/watch?v=Q5CqN-vbetM) 2025-08-14T14:15Z 1.1M followers, [---] engagements
"GCSE Physics - The difference between Speed and Velocity & Distance and Displacement This video covers: - The difference between scalar and vector quantities - Why speed is scalar but velocity is a vector - The difference between distance and displacement - How to calculate speed and velocity - Common speeds you need to remember General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=QaU9jMHh7gE) 2019-11-28T13:10Z 1.1M followers, 700.4K engagements
"GCSE Chemistry - How to Find the Volume of a Gas This video covers: - How to calculate the volume of a gas using the equal: volume = moles x [--] - How to find the volume of a product when you're told the volume of a reactant Exam board specific info: AQA - Separate science and higher tier only IGCSE Edexcel - Separate science and higher tier only Edexcel - Separate science and higher tier only OCR 21st Century - Separate science and higher tier only OCR Gateway - Separate science and higher tier only GCSE Chemistry playlist:"
[YouTube Link](https://youtube.com/watch?v=Qn5CgfokdWk) 2020-01-23T13:15Z 1.1M followers, 254.4K engagements
"GCSE Biology - Cell cycles Chromosomes & Mitosis In order to survive and grow organisms require a constant supply of new cells. In this video we explore how these cells are generated through the cell cycle with a particular focus on mitosis. We will also look at the role chromosomes play and the different forms they take. In this video we'll look at: - How new cells are generated by the cell cycle - What mitosis is and how it works - The role of chromosomes and the different forms they take"
[YouTube Link](https://youtube.com/watch?v=RHyZVmbiA78) 2018-09-24T14:47Z 1M followers, 692.3K engagements
"GCSE Chemistry - Metals and Non-Metals This video covers the difference between the properties of metals and non-metals and takes a look at transition metals"
[YouTube Link](https://youtube.com/watch?v=Rc2JBp91V7o) 2019-02-12T13:11Z 1.1M followers, 636.4K engagements
"GCSE Chemistry - Rates of Reaction In this video we'll look at: - Some examples of reactions that happen at different rates - The different ways we can calculate the rate of a reaction - Some examples of calculating the rate of reaction using decimetres cubed and minutes (higher tier)"
[YouTube Link](https://youtube.com/watch?v=SPXanyy3-hU) 2019-04-02T13:29Z 1M followers, 726.7K engagements
"GCSE Biology - Land Use - Deforestation & Peat Bogs In this video we explore how destroying forests and peat bogs affects the environment and the consequences it has for biodiversity"
[YouTube Link](https://youtube.com/watch?v=SROoINlp4VY) 2019-01-29T13:11Z 1M followers, 97.2K engagements
"GCSE Physics - Charge Current & Time This video covers: - What charge is - How to use the Q = I x t equation - Examples General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=TIHW5hEoaAw) 2019-09-09T13:00Z 1.1M followers, 302.2K engagements
"GCSE Physics - Vector Diagrams and Resultant Forces This video covers: - How to represent forces with scale diagrams - Finding the resultant force from vectors - How to resolve vectors by splitting them into horizontal and vertical components General info: - Suitable for all GCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Free body diagrams are higher tier only IGCSE Edexcel - You don't need to know this content Edexcel - Drawing and using free body"
[YouTube Link](https://youtube.com/watch?v=U8z8WFhOQ_Y) 2019-11-10T13:52Z 1.1M followers, 474K engagements
"GCSE Biology - Why Do We Get Heart Disease and How to Treat It - Cardiovascular Disease (CVD) Cardiovascular disease encompasses a group of diseases. Explore what each of these are and how we can treat them. Diseases: Coronary artery disease Heart attacks Faulty valves Heart failure Treatments: Stents Statins Replacement valves Replacement hearts Learn everything you need to know of GCSE Biology (based on AQA) Our video on the heart: https://www.youtube.com/watchv=zU90AkcTJEs"
[YouTube Link](https://youtube.com/watch?v=UN5BlPfMUkg) 2018-11-22T13:42Z 995K followers, 270.8K engagements
"GCSE Maths - Finding the Equation of a Straight Line From [--] Sets of Coordinates https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Finding the equation of a straight line when given two coordinates. [--]. How to use the three-step method: * Step 1: Calculate the gradient (m) using the formula. * Step 2: Substitute the gradient (m) and one of the coordinates to find the y-intercept (c). * Step 3: Write the final equation by substituting the calculated values into y = mx + c. [--]. Two worked examples demonstrating the method. *** EXAM BOARD INFO *** This video is suitable for maths courses around"
[YouTube Link](https://youtube.com/watch?v=UdHaBsfatxc) 2020-10-14T09:30Z 1.1M followers, 198K engagements
"GCSE Maths - How to Plot a Straight Line Using a Table of Coordinates (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Plotting straight-line graphs using a table of values. [--]. How to plot graphs when the equation is not initially in the form y = mx + c. [--]. Plotting a straight-line graph only within a specified range of x-values. [--]. Why using three points is a good way to check your working. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All"
[YouTube Link](https://youtube.com/watch?v=VM3i6-gvKSA) 2020-10-18T09:00Z 1.1M followers, 139.1K engagements
"GCSE Biology - How Enzymes Work #19 Learn what enzymes are why we need them and how they work (lock and key model vs induced fit model)"
[YouTube Link](https://youtube.com/watch?v=VNX9UQ08fZ4) 2018-11-07T14:45Z 628K followers, 371.3K engagements
"GCSE Biology - Levels of Organisation - Cells Tissues Organs and Organ Systems #13 The body is complex Learn how it is organised into cells tissues organs and organ systems"
[YouTube Link](https://youtube.com/watch?v=VO2QkpwAG9o) 2023-10-18T18:56Z 658K followers, 276.8K engagements
"A Level Biology - Carbohydrate Tests Test For Reducing & Non-Reducing Sugars Starch https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and examples of reducing sugars * Ability to donate electrons * Includes all monosaccharides (e.g. glucose) and some disaccharides (e.g. maltose lactose) [--]. Definition and examples of non-reducing sugars and carbohydrates * Inability to donate electrons without prior hydrolysis * Includes most disaccharides (e.g. sucrose) and all polysaccharides (e.g. starch) [--]. How to test for reducing sugars (Benedict's Test) * Procedure involving Benedict's"
[YouTube Link](https://youtube.com/watch?v=VRsjCoV5reo) 2025-04-24T14:30Z 1M followers, [----] engagements
"GCSE Biology - Variation and Evolution Explore all the terms around evolution including 'natural selection' 'variation' and 'survival of the fittest'. And see how Darwins came up with the theory of evolution despite not even knowing what DNA or mutation were"
[YouTube Link](https://youtube.com/watch?v=VjlE5Qzl1S0) 2019-01-10T13:19Z 1M followers, 393K engagements
"GCSE Physics - Contact and Non-Contact Forces This video covers: - What contact forces are - Examples - friction air resistance tension normal reaction force - What non-contact forces are - Examples - gravitational electrostatic magnetic General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Not tested directly but it is helpful to understand the concepts Edexcel -"
[YouTube Link](https://youtube.com/watch?v=WCPTKRaScgE) 2019-11-03T13:57Z 1.1M followers, 637.8K engagements
"GCSE Physics - Kinetic Energy In this video you'll learn: - How speed and mass affect kinetic energy - How to use the kinetic energy equation General info: - You need to memorise the equation for kinetic energy - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
[YouTube Link](https://youtube.com/watch?v=WrFCHt21kVA) 2019-05-22T07:20Z 1.1M followers, 644.5K engagements
Limited data mode. Full metrics available with subscription: lunarcrush.com/pricing
@cognitoedu Cognito
Cognito posts on YouTube about science, stem, how to, what is the most. They currently have [---------] followers and [---] posts still getting attention that total [------] engagements in the last [--] hours.
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Social Influence
Social category influence social networks technology brands finance countries
Social topic influence science #1669, stem #290, how to, what is #1476, what are #424, for all, ib, gas #1601, youtube, study #28
Top assets mentioned Noble Corporation (NE)
Top Social Posts
Top posts by engagements in the last [--] hours
"A-Level Biology - mRNA & tRNA Messenger RNA & Transfer RNA Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Structure and function of messenger RNA (mRNA) * Role in protein synthesis specifically carrying genetic information during transcription. * Structural features including its linear single-stranded form codons and the presence of uracil. [--]. Structure and function of transfer RNA (tRNA) * Role in protein synthesis specifically transporting amino acids during translation. * Structural features including its clover-leaf shape anticodon and amino acid binding site."
YouTube Link 2025-11-04T15:15Z 1.2M followers, [----] engagements
"A-Level Biology - Human Gas Exchange System - Structure Adaptations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure of the Human Gas Exchange System * The path of air through the trachea bronchi bronchioles and into the alveoli. * The role of respiration in body cells and the need for oxygen. * The removal of carbon dioxide as a waste product. [--]. The Process of Gas Exchange in the Alveoli * An explanation of diffusion and concentration gradients. * How oxygen diffuses from the alveoli into the blood. * How carbon dioxide diffuses from the"
YouTube Link 2026-01-12T15:30Z 1.2M followers, [----] engagements
"GCSE Biology - Communicable Disease Bacterial Disease (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Bacteria * Distinction between harmful and helpful bacteria (e.g. gut bacteria). * Basic characteristics: single-celled organisms size relative to human cells reproduction within hosts toxin production. [--]. Salmonella * Cause of food poisoning. * Transmission routes (e.g. contaminated food infected chickens). * Symptoms (fever cramps vomiting diarrhoea). * Recovery and importance of hydration. * Prevention through vaccination (UK"
YouTube Link 2025-03-14T15:23Z 1.2M followers, 44.4K engagements
"GCSE Chemistry - Elements Isotopes & Relative Atomic Mass (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Elements and Atomic Structure * Recap of subatomic particles (protons neutrons electrons). * The significance of proton number (atomic number) for element identification. * Overview of the Periodic Table nuclear symbols and element symbols. [--]. Isotopes Explained * Definition of isotopes: atoms of the same element with the same proton number but different neutron numbers. * Illustration with Carbon-12 and Carbon-13. * Note on how isotopes affect"
YouTube Link 2025-05-27T16:04Z 1.2M followers, 151.2K engagements
"How to Round Numbers to Significant Figures (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Identifying significant figures in numbers. [--]. How to round numbers to a specific number of significant figures. * Identifying the digit to round (the 'last digit'). * Using the next digit (the 'decider'). [--]. The potential ambiguity of trailing zeros in integers. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Introduction 0:12 What Are Significant Figures 1:02 Counting Significant"
YouTube Link 2020-05-26T09:30Z 1.2M followers, 656.6K engagements
"GCSE Physics - How Lenses Work - Convex & Concave Lenses Real & Virtual Images (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two main types of lenses and how they refract light * Convex (converging) lenses that focus parallel light rays to a principal focus. * Concave (diverging) lenses that disperse parallel light rays. [--]. Key properties and terminology for lenses * The principal focus (or focal point) and the axis of a lens. * The definition of focal length. * The relationship between focal length lens curvature and the power of a lens. [--]. The"
YouTube Link 2025-10-10T14:15Z 1.2M followers, 34.4K engagements
"GCSE Physics - Longitudinal & Transverse Waves - Labelling & Calculating Wave Speed (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The function of waves * Waves transfer energy but do not transfer matter. [--]. How to label the parts of a wave * Explanation of displacement-distance graphs. * Labelling amplitude wavelength crest and trough. [--]. Calculating wave frequency * Explanation of displacement-time graphs and time period. * Using the formula frequency = [--] / time period (f = 1/T). [--]. Calculating wave speed * Using the wave speed equation: wave speed"
YouTube Link 2025-10-02T14:15Z 1.2M followers, 62.4K engagements
"GCSE Physics - What Are Magnets How to Draw Magnetic Field Lines Check out our website: https://cognitoedu.link/physics_magnets In this video you'll learn: - What magnets are - How to draw field lines - How field lines show the interaction between magnets This video is suitable for: - Higher and Foundation tiers - All exam boards - Triple and combined science Using a compass to find field lines (not our video) https://www.youtube.com/watchv=DMO373nDp8M Maths Playlist: https://www.youtube.com/playlistlist=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh GCSE Chemistry playlist:"
YouTube Link 2019-06-09T09:24Z 1.2M followers, 418.3K engagements
"A-Level Biology - Mitosis - Stages of Mitosis & Cytokinesis Cell Division & Cancer (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What Mitosis and Cytokinesis Are * Their roles as key stages within the cell cycle. * The primary functions of mitosis including growth repairing damaged cells and asexual reproduction. [--]. The Stages of Mitosis and Cytokinesis * Prophase: Chromosomes condense and become visible and spindle fibres form. * Metaphase: Replicated chromosomes align along the centre of the cell (the equator). * Anaphase: Sister chromatids"
YouTube Link 2025-12-04T15:30Z 1.2M followers, [----] engagements
"GCSE Chemistry - Covalent Bonding - Formation Drawing Covalent Bonds (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Covalent Bonding Formation * The sharing of electrons between non-metal atoms. * Achieving a stable full outer shell of electrons. * A brief comparison with ionic bonding. [--]. How to Draw Covalent Bonds * Using dot and cross diagrams to show electron sharing. * Representing molecules with displayed formula using lines for bonds. * The use of 3D models to visualise the shape of molecules. [--]. Covalent Bonding in Ammonia * A step-by-step"
YouTube Link 2025-06-17T16:12Z 1.2M followers, 149.4K engagements
"GCSE Physics - How to Draw Ray Diagrams - Concave & Convex Lenses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to draw ray diagrams for concave (diverging) lenses. * Setting up the diagram with the principal axis and focal points (F and 2F). * Drawing the two key light rays from the top of an object. * Locating the virtual image where the rays appear to originate. [--]. How to describe the image formed by a concave lens. * Understanding the properties: virtual upright and diminished (smaller). [--]. How to draw ray diagrams for convex (converging)"
YouTube Link 2025-10-13T14:15Z 1.2M followers, 25.5K engagements
"What are Mixed Numbers and Improper Fractions & How to Convert Between Them (Fractions Part 2) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Improper Fractions. [--]. Mixed Numbers. [--]. Converting Between Fraction Types. * How to convert an improper fraction into a mixed number by division. * How to convert a mixed number into an improper fraction using multiplication and addition. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Introduction 0:16 What are Improper Fractions 1:00 What are"
YouTube Link 2020-04-06T09:00Z 1.2M followers, 112.2K engagements
"GCSE Physics - Voltage Current & Resistance V = IR Equation IV Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The V=IR equation (Ohm's Law) * Defining potential difference (voltage) current and resistance. * Worked examples of calculating voltage and resistance. [--]. Relationship between Voltage Current and Resistance * Understanding the proportional relationship when resistance is constant. [--]. Current-Potential Difference (I-V) Graphs for Ohmic Conductors * The characteristic linear graph for a resistor at a constant temperature. * How the"
YouTube Link 2025-10-20T14:15Z 1.2M followers, 35.8K engagements
"GCSE Maths - How to Factorise an Expression into a Bracket (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to factorise an algebraic expression using a single bracket. [--]. Finding the Highest Common Factor (HCF) of all terms in an expression. [--]. Writing the expression in its factorised form. [--]. How to check your answer by expanding the factorised expression. [--]. Factorising expressions with two terms and three terms. [--]. Factorising expressions involving multiple different variables. *** EXAM BOARD INFO *** KS3 - Not on your course GCSE Foundation -"
YouTube Link 2020-06-25T11:28Z 1.2M followers, 238.1K engagements
"GCSE Physics - Scalar & Vector Quantities - What They Are Examples How to Represent Vectors Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Scalar Quantities * Scalar quantities have magnitude (size) but no direction. * Examples include speed distance mass temperature and time. [--]. Definition of Vector Quantities * Vector quantities have both magnitude and direction. * Examples include velocity displacement acceleration force and momentum. [--]. Comparing Distance and Displacement * An explanation of how distance (a scalar) differs from displacement (a"
YouTube Link 2025-09-08T14:15Z 1.2M followers, 55K engagements
"GCSE Physics - Newton's 1st & 2nd Laws Circular Motion Inertia (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Newton's First Law of Motion * The role of resultant force in changing an object's motion. * How the law applies to stationary and moving objects. [--]. Newton's Second Law of Motion * The relationship between a non-zero resultant force and acceleration. * How acceleration affects an object based on its initial motion (speeding up slowing down changing direction). [--]. Circular Motion as an example of acceleration * The difference between constant"
YouTube Link 2025-09-24T14:15Z 1.2M followers, 34.5K engagements
"GCSE Chemistry - Percentage Yield - Theoretical & Actual Yield Calculations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of yield in chemical reactions. * The difference between the actual yield (the amount of product you actually get) and the theoretical yield (the amount of product you expect based on calculations). [--]. Reasons why the actual yield is often less than the theoretical yield. * Incomplete reactions which can occur if a reaction is slow or reversible. * The occurrence of unwanted side reactions which consume reactants to"
YouTube Link 2025-07-03T15:15Z 1.2M followers, 33.9K engagements
"GCSE Chemistry - Metals & Non-metals: Electron Arrangement & Properties (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Metals and Non-metals * Location on the periodic table. * Tendency of metals to form positive ions * Tendency of non-metals to form negative ions or no ions * The role of electron arrangement in achieving a full outer shell and ion formation. [--]. Reactivity Trends in Metals * How metals become more reactive further down their group. * Explanation based on the number of electron shells and the ease of losing outer"
YouTube Link 2025-06-05T14:10Z 1.2M followers, 68.2K engagements
"GCSE Biology - Digestive Enzymes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The necessity of breaking down large biological molecules (carbohydrates proteins lipids) into smaller soluble molecules for absorption. [--]. The role of enzymes as biological catalysts in speeding up digestion. [--]. Carbohydrate Digestion: * Breakdown of starch (a polymer of glucose) by amylase into maltose. * Breakdown of maltose by maltase into glucose. [--]. Protein Digestion: * Breakdown of proteins by protease enzymes (like trypsin and pepsin) into amino acids. [--]. Lipid"
YouTube Link 2025-02-27T17:36Z 1.2M followers, 133K engagements
"GCSE Biology - Surface Area to Volume Ratio (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of surface area to volume ratio. [--]. The importance of SA:V ratio for the exchange of substances via diffusion in organisms. * How single-celled organisms exchange substances. * Why large multicellular organisms need specialised systems. [--]. How surface area and volume change as an organism gets larger. [--]. Calculating surface area volume and the SA:V ratio using cube examples. [--]. Why larger organisms cannot rely solely on diffusion across their outer"
YouTube Link 2022-05-22T10:21Z 1.2M followers, 213.2K engagements
"What is Standard Form (also known as Scientific Notation) (Part 1/4) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Standard Form (Scientific Notation) [--]. The General Format of Standard Form * Understanding the A x [--] structure. [--]. Identifying Correct Standard Form [--]. Converting Numbers from Standard Form to Ordinary Numbers * How positive powers indicate multiplication by [--]. * How negative powers indicate division by [--]. * Step-by-step examples of converting standard form back into ordinary decimal numbers. *** EXAM BOARD INFO ***"
YouTube Link 2020-06-01T10:46Z 1.2M followers, 500K engagements
"GCSE Chemistry - Rates of Reaction - How to Measure it How to Show it on Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of the rate of a chemical reaction. * How the speed of a reaction is defined. * Examples of slow moderate and fast reactions. [--]. How to calculate the average rate of reaction. * Using the quantity of reactant used over time. * Using the quantity of product formed over time. * Worked examples with units such as cm/s g/s and mol/min. [--]. How to represent reaction rates graphically. * Understanding that reaction rates"
YouTube Link 2025-07-23T14:15Z 1.2M followers, 78.4K engagements
"GCSE Maths - Alternate Corresponding and Allied Angles - Parallel Lines Angle Rules (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. When alternate corresponding and allied angle rules apply. [--]. General properties of the angles formed in that scenario. [--]. The three main angle rules for parallel lines: * Alternate angles are equal. * Corresponding angles are equal. * Allied angles add up to [---]. [--]. How to recognise these angle relationships even when the shapes are rotated or flipped. [--]. Applying these rules to calculate unknown angles in diagrams"
YouTube Link 2021-08-15T09:56Z 1.2M followers, 811.2K engagements
"GCSE Biology - How We Control Our Body Temperature View full lesson: https://cognitoedu.link/biology_thermoregulation This video covers: - Why we need to regulate our body temperature - How the thermoregulatory centre in the brain works - How we warm ourselves up when we're too cold - How we cool ourselves down when we're too hot Exam board specific info: AQA - Separate/triple science only IGCSE Edexcel - Everything is relevant to your course Edexcel - Separate/triple science only OCR 21st Century - Separate/triple science only OCR Gateway - Separate/triple science only Related videos/topics:"
YouTube Link 2020-01-26T10:15Z 1.2M followers, 470K engagements
"GCSE Physics - Efficiency Energy & Power (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of efficiency in energy transfers. * The difference between useful energy output and wasted energy. * Why devices are not 100% efficient. [--]. How to calculate the efficiency of a device. * The formula for efficiency using energy input and useful energy output. * The formula for efficiency using power input and useful power output. * How to express efficiency as a decimal or a percentage. [--]. Worked examples of efficiency calculations. * Comparing the"
YouTube Link 2025-08-11T14:15Z 1.2M followers, 38.9K engagements
"GCSE Biology - Differentiation and Specialised Cells (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What specialised cells are. * Examples in animals. * Examples in plants. [--]. How specialised cells are adapted to their function. [--]. The concept of cell differentiation. * How unspecialised cells change to become specialised. * The process starting from a zygote and involving mitosis. [--]. A brief introduction to stem cells. *** CHAPTERS *** 0:00 Intro to Specialised Cells and Differentiation 0:22 What are Specialised Cells 1:01 Sperm Cell Adaptations 2:14"
YouTube Link 2022-03-13T10:15Z 1.2M followers, 506.5K engagements
"GCSE Physics - Specific Heat Capacity Internal Energy & Temperature (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of internal energy. * The total energy stored by the particles within a substance or system. * A breakdown into kinetic energy stores (related to temperature) and potential energy stores. [--]. The relationship between heating internal energy and temperature. * How transferring energy to a substance increases its internal energy. * How temperature is a measure of the average internal energy of the particles. [--]. The definition of"
YouTube Link 2025-08-04T14:15Z 1.2M followers, 69.3K engagements
"GCSE Chemistry - Alkanes - Properties & Combustion (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Properties of alkanes and how they change with carbon chain length. * The trend in boiling points. * State at room temperature (gas liquid solid). * Volatility viscosity and flammability. [--]. The complete combustion of alkanes. * The reactants (hydrocarbon and oxygen) and products (carbon dioxide and water). * Explanation of combustion as an exothermic oxidation reaction. [--]. How to write and balance chemical equations for complete combustion. * A"
YouTube Link 2025-10-22T11:00Z 1.2M followers, 24.4K engagements
"GCSE Maths - Types of Triangle (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The four main types of triangles. [--]. Key features of Equilateral triangles. [--]. Key features of Isosceles triangles. [--]. Key features of Right-angled triangles. [--]. Key features of Scalene triangles. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - Not in your course *** CHAPTERS *** 0:00 Intro: The [--] Types of Triangle 0:23 Equilateral"
YouTube Link 2021-03-17T10:30Z 1.2M followers, 147.1K engagements
"GCSE Physics - Speed Velocity Distance & Displacement Scalar & Vector Quantities (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The difference between scalar and vector quantities. * Scalars are defined by magnitude (size) only. * Vectors are defined by both magnitude and direction. [--]. The classification of speed velocity distance and displacement. * Speed and distance are scalar quantities. * Velocity and displacement are vector quantities. [--]. How to calculate speed and velocity using their respective formulae. * The formula for speed: speed ="
YouTube Link 2025-09-18T14:15Z 1.2M followers, 46.5K engagements
"GCSE Biology - The Lungs & Gas Exchange (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The structure of the human gas exchange system. * The path air takes from the nose and mouth to the alveoli in the lungs. * The roles of the trachea bronchi bronchioles and alveoli. * The journey of oxygen to the body cells and carbon dioxide away from them. [--]. How gas exchange occurs in the alveoli. * An explanation of gas exchange via diffusion. * The concentration gradients for oxygen and carbon dioxide between the alveoli and the capillaries. [--]. Adaptations of"
YouTube Link 2025-11-07T15:00Z 1.2M followers, 40.2K engagements
"GCSE Physics - Power & Work Done - Equations Calculations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two definitions of power in physics. * Power as the rate at which energy is transferred. * Power as the rate at which work is done. [--]. The key difference between 'energy transferred' and 'work done'. * Illustrated with examples of charging a phone versus pushing a car. [--]. The equations for calculating power. * P = E / t (Power = Energy transferred / Time). * P = W / t (Power = Work done / Time). [--]. The standard units for power energy work and"
YouTube Link 2025-08-07T14:15Z 1.2M followers, 41.8K engagements
"GCSE Physics - Development of the model of the atom This video covers: - Democritus - Atomic Theory - John Dalton - Solid spheres - JJ Thompson - Plumb Pudding model - Ernest Rutherford - Nuclear Model - Niels Bohr - Electron shells - James Chadwick - Neutrons General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century -"
YouTube Link 2019-10-08T14:26Z 1.2M followers, 222.7K engagements
"GCSE Physics - Distance-Time Graphs This video covers: - How to interpret distance-time graphs - How to calculate speed on a distance-time graph - What the gradient of the line means - Drawing a tangent General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel - Everything is relevant to your course OCR 21st Century -"
YouTube Link 2019-12-03T15:23Z 1.2M followers, 828.9K engagements
"GCSE Chemistry - Diamond & Graphite - Structure Properties (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Allotropes of Carbon * Definition of allotropes as different structural forms of the same element. * Introduction to diamond graphite graphene and fullerenes. [--]. Structure and Properties of Diamond * A giant covalent structure. * Each carbon atom is covalently bonded to four other carbon atoms. * Forms a regular rigid 3D lattice. * Properties: very strong high melting point and does not conduct electricity as there are no free electrons. 3."
YouTube Link 2025-06-19T14:24Z 1.2M followers, 72K engagements
"GCSE Maths - How to Find the Gradient Using the Coordinates of Two Points (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The formula for calculating the gradient of a straight line using two coordinate points. [--]. How to calculate the gradient between two points when only given their coordinates. [--]. How to apply the coordinate method to find the gradient of a line shown on a graph. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your"
YouTube Link 2020-10-04T09:15Z 1.2M followers, 256.6K engagements
"A-Level Biology - Cell Cycle - Interphase Mitosis Cytokinesis Checkpoints (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The purpose and phases of the cell cycle. * The role of cell division in growth and tissue repair. * An overview of the three main phases: interphase mitosis and cytokinesis. [--]. The stages and processes of interphase. * The key activities: cell growth protein synthesis and DNA replication. * A breakdown of the G1 S and G2 phases. [--]. Checkpoints for quality control during the cell cycle. * The role of checkpoints in preventing errors"
YouTube Link 2025-11-17T15:30Z 1.2M followers, [----] engagements
"GCSE Chemistry - Paper Chromatography Test yourself with our quiz: https://cognitoedu.link/chemistry_chromatography In this video you'll learn: - What chromatography is used for - The process for setting up and carrying out paper chromatography - What the mobile and stationary phases are GCSE chemistry GCSE 9-1 9-1 Chemistry Chromatography lesson revision chemistry revision gcse science science revision chemistry lesson stationary phase mobile phase chromatogram GCSE chemistry GCSE 9-1 9-1 Chemistry Chromatography lesson revision chemistry revision gcse science science revision chemistry"
YouTube Link 2019-05-05T11:18Z 1.2M followers, 1.3M engagements
"GCSE Biology - Mitosis Chromosomes Cell Division Cytokinesis (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The requirement for cell division in multicellular eukaryotic organisms. * For growth development and repair. [--]. An overview of the cell cycle (the life cycle of a cell). * Stage 1: Growth (increase in size and sub-cellular structures). * Stage 2: DNA replication and mitosis. * Stage 3: Division (cytokinesis). [--]. The structure and role of DNA and chromosomes. * How DNA exists as long strings when not dividing. * How DNA condenses into"
YouTube Link 2025-04-17T13:41Z 1.2M followers, 158K engagements
"GCSE Physics - Specific Latent Heat - Vaporisation & Fusion Equation (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Latent heat and changes of state. * Why temperature remains constant during melting boiling freezing and condensing. * Analysing heating and cooling curves (temperature-time graphs). [--]. The definition of specific latent heat. * The energy required to change the state of [--] kg of a substance. [--]. The two types of specific latent heat. * Specific latent heat of fusion (for melting and freezing). * Specific latent heat of vaporisation (for"
YouTube Link 2025-12-18T15:15Z 1.2M followers, [----] engagements
"GCSE Physics - Velocity-Time Graphs - How to Find Acceleration & Distance Travelled (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Interpreting Velocity-Time Graphs * How the gradient of the graph represents acceleration. * Identifying sections of constant acceleration constant deceleration and constant velocity. * Understanding what steeper or curved lines mean for acceleration. [--]. Calculating Acceleration * Using the change in velocity and change in time to calculate the gradient. [--]. Calculating Distance Travelled * Understanding that the area under"
YouTube Link 2025-09-22T14:15Z 1.2M followers, 50.4K engagements
"Trigonometry SOH CAH TOA Sin Cos Tan Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Identifying right-angled triangles. [--]. Labelling the sides of a right-angled triangle. * Identifying the Hypotenuse (H). * Identifying the Opposite (O) and Adjacent (A) sides relative to a specific angle (x). [--]. Introducing the three main trigonometric ratios. * Sine (Sin) * Cosine (Cos) * Tangent (Tan) [--]. Using the SOH CAH TOA mnemonic to remember trigonometric formulae. [--]. Calculating unknown angles in right-angled triangles. * Using inverse trigonometric functions (sin cos tan). 6."
YouTube Link 2025-02-11T08:39Z 1.2M followers, 322.8K engagements
"GCSE Maths - Area of a Sector and Length of an Arc of a Circle (Circles Part 3) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining Sectors and Arcs. * Minor and major sectors explained. * Minor and major arcs explained. [--]. Calculating the Area of a Sector. * Introducing the formula. * Understanding the formula as a fraction of the total circle area. [--]. Calculating the Length of an Arc * Introducing the formula. * Understanding the formula as a fraction of the total circle circumference. [--]. Applying the Formulas *** EXAM BOARD INFO *** This video"
YouTube Link 2021-06-06T09:30Z 1.2M followers, 308.9K engagements
"GCSE Chemistry - Graphene & Fullerenes - Structure Properties Uses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Allotropes of Carbon * An introduction to allotropes focusing on graphene and fullerenes. [--]. Graphene * The structure of graphene as a single layer of graphite. * How its hexagonal lattice of carbon atoms makes it strong. * Why it can conduct electricity due to delocalised electrons. [--]. Fullerenes * An explanation of how fullerenes are molecules of carbon atoms with hollow shapes. * The structures are based on hexagonal rings but can also"
YouTube Link 2025-06-20T14:18Z 1.2M followers, 36.1K engagements
"How to Find the Volume of Cylinders & Prisms Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Volume of Prisms and Cylinders * Identifying the constant cross-sectional area as the key feature. * Understanding the general formula for volume. [--]. Formula for the volume of a Cylinder [--]. Formula for the volume of a Triangular Prism [--]. Other Prisms * Recognising that the general volume formula applies to all prisms *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All"
YouTube Link 2021-07-11T12:48Z 1.2M followers, 207K engagements
"GCSE Biology - Characteristics of Living Things (Organisms) (2026/27 exams) Check out our website https://www.cognito.org/ In this video we cover: - The characteristics that all living things have have in common - You can remember these using the acronym MRS GREN where the letters stand for movement respiration sensitivity growth reproduction excretion and nutrition. Exam board specific info: AQA - Not in your course but useful to understand IGCSE Edexcel - Suitable for everyone Edexcel - Not in your course but useful to understand OCR 21st Century - Not in your course but useful to"
YouTube Link 2021-06-13T09:15Z 1.2M followers, 565.5K engagements
"GCSE Maths - Solving Inequalities by Plotting them on a Graph (Inequalities Part 4) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to graphical inequalities. [--]. Plotting linear inequalities. [--]. Distinguishing between inequality types on the graph. [--]. Identifying the correct region. [--]. Shading the region that satisfies multiple inequalities. [--]. Alternative methods for indicating the required region. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your"
YouTube Link 2020-09-08T09:15Z 1.2M followers, 355.9K engagements
"GCSE Biology - The Circulatory System The Blood (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Four Main Components of Blood * Red Blood Cells * White Blood Cells * Platelets * Plasma [--]. Red Blood Cells (RBCs) * Function in oxygen transport (haemoglobin and oxyhaemoglobin). * Adaptations: No nucleus biconcave shape. [--]. White Blood Cells * Role in the immune system and defending against infection. * Defence mechanisms: Phagocytosis producing antibodies producing antitoxins. * Presence of a nucleus. [--]. Platelets * Structure (cell fragments no"
YouTube Link 2025-03-10T15:28Z 1.2M followers, 101K engagements
"A-Level Biology - Nucleic Acids DNA vs RNA (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure of Nucleotides * The three components of a nucleotide: a pentose sugar a phosphate group and a nitrogenous base. * How nucleotides join via condensation reactions to form polynucleotide chains with a sugar-phosphate backbone. [--]. The Structure and Function of DNA * The double helix structure including the antiparallel strands. * The four nitrogenous bases in DNA: adenine guanine cytosine and thymine. * Purines pyrimidines and complementary base"
YouTube Link 2025-10-27T15:22Z 1.2M followers, 14.4K engagements
"GCSE Biology - Structure of a Leaf Plant Cell Organisation (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Levels of organisation in plants. * Cells tissues organs and organ systems. * Example: Leaves stem and roots forming a transport system. [--]. Structure of a plant leaf (cross-section). * Function as the site of photosynthesis. * Key tissues: Epidermis (upper and lower) mesophyll (palisade and spongy) xylem and phloem. [--]. Adaptations of the leaf for photosynthesis and gas exchange. * Role of palisade mesophyll and chloroplasts. * Importance of spongy"
YouTube Link 2025-03-27T15:09Z 1.2M followers, 119K engagements
"GCSE Chemistry - Esters (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Structure of Esters * Identifying the functional group. [--]. Properties and Uses of Esters [--]. Formation of Esters (Esterification) * Reaction between a carboxylic acid and an alcohol. * Identifying the ester link. *** EXAM BOARD INFO *** AQA - Everything is relevant to your course You only need to know the example of ethyl ethanoate. IGCSE Edexcel - Separate/triple science and higher tier only Edexcel - Not in course but useful for understanding condensation polymers"
YouTube Link 2020-03-26T10:30Z 1.2M followers, 429.3K engagements
"GCSE Physics - Static Electricity Build-up of Charge on Insulating Materials (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What is static electricity * The build-up of charge on insulating materials. * Why most materials are electrically neutral. [--]. How static electricity is created by friction. * The transfer of negative electrons between materials when they are rubbed together. * The difference in behaviour between conducting and insulating materials. [--]. How insulating materials become charged. * An explanation of how a polythene rod and a cloth"
YouTube Link 2025-12-09T15:15Z 1.2M followers, 12K engagements
"GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Calculating the original value of an item after a percentage increase or decrease. * Understanding that the original value represents 100%. * Relating the new value to a percentage of the original value. [--]. Method for calculating reverse percentages using the new value. [--]. Calculating the original value when given the actual change in value and the percentage change. * Understanding that the value change corresponds to the"
YouTube Link 2021-02-23T10:00Z 1.2M followers, 403.1K engagements
"GCSE Maths - What are Inequalities (Inequalities Part 1) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the meaning of inequality symbols. * Less than and More than. * Less than or equal to and More than or equal to. [--]. Working with inequalities. * Using positive and negative numbers. * Understanding equivalent expressions. * Interpreting compound inequalities. [--]. Representing inequalities on a number line. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on"
YouTube Link 2020-08-25T09:00Z 1.2M followers, 847.7K engagements
"GCSE Biology - What are Stem Cells Difference Between Embryonic and Adult Stem Cells Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Key Features of Stem Cells. [--]. Importance of Stem Cells. * Role in development from a fertilised egg into an embryo. [--]. Examples of Stem Cells. * Embryonic stem cells. * Adult stem cells. * Plant stem cells. *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone OCR Gateway - Suitable for everyone CIE - Suitable for"
YouTube Link 2022-01-23T10:30Z 1.2M followers, 493.6K engagements
"GCSE & KS3 Biology - Plant Reproduction Anatomy & Pollination Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The reproductive parts of a flowering plant. * An overview of the male reproductive parts (stamen) including the anther and filament. * An overview of the female reproductive parts (carpel) including the stigma style and ovary. * The role of petals and sepals. [--]. The process and types of pollination. * The definition of pollination as the transfer of pollen. * An explanation of self-pollination. * An explanation of cross-pollination. [--]. Flower adaptations for"
YouTube Link 2025-10-29T15:46Z 1.2M followers, 15.9K engagements
"GCSE Biology - What are Enzymes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The role and importance of enzymes in biological processes. [--]. Definition and function of catalysts and enzymes. * What a catalyst is and its properties. * Enzymes as biological catalysts made of amino acids. * How enzymes speed up specific reactions. [--]. How enzymes work at a molecular level. * The concept of the active site. * The interaction between enzymes and substrates. * Enzyme specificity due to active site shape. [--]. Models explaining enzyme action. * The Lock and"
YouTube Link 2022-02-06T11:01Z 1.2M followers, 550.8K engagements
"GCSE Chemistry - States of Matter & Changing State Find revision notes questions flashcards and more: https://cognitoedu.link/chemistry_states This video explains 'particle theory' and uses it to describe the [--] states of matter: solid liquid and gas. It also covers how substances move between these states at the particle level. This video is suitable for: - All exam boards - Triple and combined science - Higher and Foundation tiers The last part of the video on the limitations of particle theory is only relevant to higher tier students but this is labelled with the usual "Higher Tier" box in"
YouTube Link 2019-02-27T14:45Z 1.2M followers, 811.6K engagements
"GCSE Maths - What are Quadratic Graphs (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Quadratic Graphs. * Recognising the shape of quadratic graphs (parabolas). * Identifying the corresponding quadratic equations (containing an x term). [--]. Key Features of Quadratic Graphs. [--]. The Significance of the x Term. [--]. Basic Quadratic Graphs. [--]. How Coefficients Affect Quadratic Graphs. * Brief overview of how changing the coefficients and constants transforms the graph. *** EXAM BOARD INFO *** This video is suitable for maths courses around"
YouTube Link 2020-11-08T10:00Z 1.2M followers, 390.3K engagements
"How to Find the Volume of a Frustum Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding what a frustum is. [--]. Method for calculating the volume of a frustum. [--]. Finding the dimensions of the large and small cones. [--]. Worked example. * Step-by-step calculation involving substitution into the volume formula. * Presenting the answer in terms of pi and rounded to significant figures. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course"
YouTube Link 2021-07-25T09:11Z 1.2M followers, 143.1K engagements
"GCSE Biology - Health & Disease (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining health as a state of physical and mental wellbeing. * Understanding health as a spectrum not just healthy or unhealthy. [--]. Exploring the factors that influence health. * Factors contributing to good health (e.g. diet exercise sleep medical care). * Factors contributing to ill health (e.g. stress lack of access to resources). [--]. Defining disease as conditions that cause ill health. [--]. Categorising diseases into two main types. * Communicable (infectious) diseases:"
YouTube Link 2025-03-11T15:22Z 1.2M followers, 55.7K engagements
"GCSE Chemistry - Moles & Mass - Avogadro's Constant Formula for Moles Mass & Mr (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of the mole as a unit of measurement in chemistry. * An explanation of Avogadro's constant. * The link between relative atomic/formula mass and the mass of one mole of a substance in grams. [--]. The formula connecting moles mass and relative formula mass (Mr). * How to calculate the number of moles in a sample. * How to rearrange the formula to calculate the mass of a sample. [--]. Applications of mole calculations. *"
YouTube Link 2025-06-26T14:41Z 1.2M followers, 143.9K engagements
"GCSE Maths - The Eight 3D Shapes You Need to Know - Vertices Edges and Faces (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the terminology used for 3D shapes (solid shapes). * Explaining vertices edges and faces. * Comparing 3D terms with 2D shape terms (corners sides). [--]. Identifying the [--] most common 3D shapes. * Cube Cuboid Triangular Prism. * Triangle-based Pyramid (including Regular Tetrahedron). * Square-based Pyramid. * Sphere Cylinder Cone. [--]. Analysing the properties of key 3D shapes. *** EXAM BOARD INFO *** This video is"
YouTube Link 2021-06-20T10:41Z 1.2M followers, 262.9K engagements
"GCSE Chemistry - Separating Metals from Metal Oxides Extraction of Metals & Reduction Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Oxidation and Reduction * Oxidation is defined as the process of gaining oxygen. * Reduction is defined as the process of losing oxygen. [--]. Why metals are found as oxides * Most metals are reactive and will oxidise when they come into contact with oxygen in the atmosphere. * Unreactive metals such as gold do not react with oxygen and can be found as pure metals. [--]. Reducing metal oxides with carbon * Metal oxides can be reacted with"
YouTube Link 2025-07-10T16:01Z 1.2M followers, 35.1K engagements
"GCSE Maths - Solving Quadratics Using the Quadratic Formula (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to solve quadratic equations using the quadratic formula. * Identifying the coefficients a b and c from the standard form ax + bx + c = [--]. * Substituting the values of a b and c into the quadratic formula. [--]. Understanding the symbol in the formula leads to two potential solutions. [--]. Calculating the two solutions for x. [--]. Worked examples demonstrating the application of the quadratic formula. *** EXAM BOARD INFO *** This video is suitable"
YouTube Link 2020-08-05T08:57Z 1.2M followers, 306.7K engagements
"GCSE Maths - Plotting a Line by Finding Where it Crosses the Axes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Plotting straight line graphs. * Using the method of finding where the line crosses the axes. [--]. Finding the y-intercept. * Understanding that x=0 on the y-axis. * Substituting x=0 into the equation to find the y-coordinate. [--]. Finding the x-intercept. * Understanding that y=0 on the x-axis. * Substituting y=0 into the equation to find the x-coordinate. [--]. Worked examples of finding intercepts and plotting the line. *** EXAM BOARD INFO ***"
YouTube Link 2020-10-21T09:00Z 1.2M followers, 102.5K engagements
"GCSE Maths - How to Factorise Quadratics by Completing the Square (Part [--] - Factorise When a=1) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Completing the Square. * Explaining its use for solving or rearranging quadratic expressions. * Understanding the target form: (x + p) + q. [--]. The Method for Completing the Square. [--]. Worked Examples. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro to"
YouTube Link 2020-08-10T10:24Z 1.2M followers, 517.1K engagements
"GCSE Maths - What are Bearings (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Bearings. [--]. Rules for Measuring Bearings. [--]. Calculating Bearings. [--]. Applying Bearings. * Using bearings from two different points to locate a third point (intersection). *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course *** CHAPTERS *** 0:00 Intro to Bearings 0:49 The [--] Rules for Bearings 1:48 Example"
YouTube Link 2021-08-22T09:43Z 1.2M followers, 1M engagements
"GCSE Biology - Cell Types and Cell Structure (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of cells as the basic smallest independently replicating unit of life. [--]. Comparison of eukaryotic cells: Animal vs. Plant cells. * Sub-cellular structures common to both. * Additional sub-cellular structures found in plant cells. [--]. Structure of prokaryotic cells (bacteria). *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone OCR"
YouTube Link 2021-05-30T09:00Z 1.2M followers, 1.4M engagements
"GCSE Biology - Classification Systems Linnaean System (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Need for Classification * Traditional methods based on appearance and their limitations. * Issues with common names and indicating relationships. [--]. The Linnaean System * Developed by Carl Linnaeus based on characteristics and structure. * Hierarchical classification: Kingdom Phylum Class Order Family Genus Species. [--]. The Binomial Naming System * Using Genus and Species for unique two-part Latin names (e.g. Homo sapiens). [--]. Developments in"
YouTube Link 2025-04-30T15:25Z 1.2M followers, 61.8K engagements
"GCSE Biology - Plant Hormones - Tropisms & Auxins https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How plants respond to environmental stimuli like light gravity and touch. [--]. The role of hormones particularly auxins in controlling plant growth responses. * Auxins are produced in shoot and root tips and diffuse to other areas. * Auxins stimulate growth in shoots but inhibit growth in roots. [--]. Explanation of phototropism: the growth response of plants to light. * Shoots exhibit positive phototropism. * Roots exhibit negative phototropism. [--]. Explanation of geotropism (gravitropism): the"
YouTube Link 2020-02-23T10:00Z 1.2M followers, 586K engagements
"GCSE Biology - Drugs - Painkillers vs Antibiotics - Relief vs Treatment (2026/27 exams) Check out our websitehttps://www.cognito.org/ Drugs can either relieve symptoms (painkillers) or treat the underlying disease (antibiotics). Learn about the drugs you need to know and how they work - including why antibiotics don't work against viruses. antibiotics and painkillers gcse antibiotics gcse drugs gcse painkillers gcse gcse antibiotic resistance different types of drugs why don't antibiotics 9-1 gcse gcse biology combined science aqa edexcel ocr aspirin paracetamol antibiotic resistance"
YouTube Link 2018-12-10T13:22Z 1.2M followers, 176K engagements
"GCSE Chemistry - Concentration Calculations (grams per dm) (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The formula for calculating the concentration of a solution. * How to use the formula triangle to calculate concentration mass or volume. * The standard units used: grams (g) for mass and decimetres cubed (dm) for volume. [--]. How to convert between different units for volume. * Converting from centimetres cubed (cm) to decimetres cubed (dm). [--]. Worked examples demonstrating how to calculate concentration in g/dm. [--]. A worked example showing how to"
YouTube Link 2025-07-02T14:15Z 1.2M followers, 23.1K engagements
"GCSE Biology - Active Transport (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and Explanation of Active Transport [--]. Comparison Between Active Transport and Diffusion [--]. Active Transport in Plant Root Hair Cells * Mechanism for absorbing mineral ions from the soil. * Necessity due to lower mineral concentration in soil. * Key adaptations of root hair cells for active transport. *** EXAM BOARD INFO *** AQA - Suitable for everyone IGCSE Edexcel - Suitable for everyone Edexcel - Suitable for everyone OCR 21st Century - Suitable for everyone"
YouTube Link 2022-02-27T10:00Z 1.2M followers, 552K engagements
"How are Proteins Made Transcription & Translation Find revision notes questions flashcards and more: https://cognitoedu.link/biology_protein_synthesis *** WHAT'S COVERED *** [--]. Introduction to Protein Synthesis [--]. Overview of the two main stages: Transcription and Translation. [--]. Messenger RNA (mRNA) * mRNA as a copy of a single gene. * Key structural differences between mRNA and DNA (length single strand Uracil vs Thymine). [--]. Transcription: Copying the Gene * The role of RNA Polymerase. * Complementary base pairing rules for mRNA synthesis. * Formation of the mRNA strand. [--]. Translation:"
YouTube Link 2020-03-15T10:00Z 1.2M followers, 1.7M engagements
"GCSE Maths - What are Cubic Graphs & How to Plot Them (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Recognising Cubic Graphs. [--]. Understanding Cubic Equations. * Definition & general form * How the sign of the x term affects the graph's overall shape. [--]. Plotting Cubic Graphs. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course (but very basic) *** CHAPTERS *** 0:00 Intro to Cubic Graphs 0:23"
YouTube Link 2020-11-18T10:15Z 1.2M followers, 218.9K engagements
"GCSE Chemistry - Ionic Compounds - Structure Properties Formula (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The structure of ionic compounds * How ionic bonds form through electron transfer between metals and non-metals. * The formation of giant ionic lattice structures due to strong electrostatic forces. * Different ways to represent ionic compounds including dot-and-cross and ball-and-stick diagrams. [--]. The properties of ionic compounds * Why they have high melting and boiling points related to the energy needed to break strong ionic bonds. *"
YouTube Link 2025-06-16T14:27Z 1.2M followers, 92.1K engagements
"GCSE Physics - Alpha Beta & Gamma Radiation How Ionising & Penetrating They Are (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Isotopes and Radioactive Decay * An explanation of stable and unstable isotopes. * How unstable isotopes undergo radioactive decay to become more stable. [--]. The Four Types of Nuclear Radiation * A breakdown of the properties of the four main types of nuclear radiation. [--]. Alpha () Radiation * Its composition (a helium nucleus) charge ionising power and penetrating power. [--]. Beta () Radiation * Its composition (a high-speed"
YouTube Link 2026-01-13T15:15Z 1.2M followers, 10K engagements
"GCSE Biology - The Nervous System Reflex Arcs Explained (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Role of the Nervous System * Need for communication and coordination in multicellular organisms. * Responding to internal and external surroundings. [--]. Structure and Function of Nerve Cells (Neurones) * Adaptations for transmitting electrical impulses (long thin branched connections). * The role of synapses in transmitting signals between neurones using chemicals. [--]. Organisation of the Nervous System * The Central Nervous System (CNS) comprising"
YouTube Link 2025-04-04T16:17Z 1.2M followers, 164.5K engagements
"GCSE Physics - Parallel Circuits (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to parallel circuits * The definition of a parallel circuit as one with more than one loop. * The advantages of using parallel circuits over series circuits such as allowing other components to continue working if one fails. [--]. Potential difference in parallel circuits * The rule that the potential difference from the source is the same across all components in each parallel loop. [--]. Current in parallel circuits * How the total current from the source is"
YouTube Link 2025-11-10T15:00Z 1.2M followers, 19.3K engagements
"GCSE Physics - Electromagnetism - Wires Coils Solenoids Electromagnets (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What is electromagnetism * How electric currents produce magnetic fields. [--]. Magnetic fields around different conductors. * The magnetic field around a straight current-carrying wire. * The magnetic field of a flat circular coil. * The magnetic field of a solenoid. [--]. The right-hand rule. * How to determine the direction of the magnetic field based on the current's direction. [--]. Electromagnets. * How a solenoid acts as an"
YouTube Link 2025-12-12T15:15Z 1.2M followers, 18K engagements
"GCSE Maths - How to Write Expressions for the nth term of Arithmetic Sequences (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Defining arithmetic sequences. [--]. Understanding the nth term expression for an arithmetic sequence. [--]. How to use the nth term expression to calculate the value of any term in the sequence. [--]. A two-step method for finding the nth term expression: * Finding and using the common difference. * Finding and using the '0th' term. [--]. Worked examples for sequences with positive negative and decimal common differences. [--]. How to check"
YouTube Link 2020-08-20T09:15Z 1.2M followers, 736.7K engagements
"A-Level Biology - Carbohydrates: Polysaccharides - Starch Glycogen Cellulose (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What polysaccharides are * Definition as complex carbohydrates made from monosaccharides. * Examples: starch glycogen and cellulose. * Key functions: energy storage and structural support. [--]. The structure and function of starch * The two forms of starch: amylose (unbranched) and amylopectin (branched). * Made from alpha-glucose monomers with 1-4 and 1-6 glycosidic bonds. * How its properties make it suitable for storing glucose"
YouTube Link 2025-10-06T14:30Z 1.2M followers, 15.4K engagements
"GCSE Biology - DNA Part [--] Chromosomes & Genome (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. DNA and Chromosomes * Definition and double helix structure of DNA (Deoxyribonucleic Acid). * How long strands of DNA are coiled up to form structures called chromosomes. * The number of chromosomes in human body cells (46 chromosomes arranged in [--] pairs). * How sex is determined by the 23rd chromosome pair (XX for female XY for male). * The appearance of chromosomes before cell division. [--]. Genes * Definition of a gene as a small section of DNA on a"
YouTube Link 2025-04-11T14:36Z 1.2M followers, 115.6K engagements
"Types of bonds: Ionic + Metallic + Covalent GCSE Study Exam STEM Science School AP IB Alevel Chemistry Physics Biology GCSE Study Exam STEM Science School AP IB Alevel Chemistry Physics Biology"
YouTube Link 2025-12-05T15:01Z 1.2M followers, 26.3K engagements
"GCSE Physics - Terminal Velocity - What Affects Air Resistance Resultant Force & Acceleration Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of terminal velocity. * Definition as the constant velocity reached by a falling object when forces are balanced. [--]. Forces acting on a falling object. * The constant downward force of weight due to gravity. * The variable upward force of air resistance (drag). [--]. The stages of reaching terminal velocity. * Initial acceleration when weight is greater than air resistance. * How increasing velocity leads to increased"
YouTube Link 2025-09-23T14:15Z 1.2M followers, 33.1K engagements
"GCSE Physics - Density - Equation How to Calculate Density Experimentally (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The concept of density * Defining density as the mass per unit of volume. * The formula for calculating density: Density = Mass / Volume. [--]. Units of density * Standard units (kilograms per metre cubed kg/m). * Common alternative units (grams per centimetre cubed g/cm). * How to convert between different units of density. [--]. Calculating density mass and volume * A worked example showing how to rearrange the density equation to"
YouTube Link 2025-12-17T15:15Z 1.2M followers, [----] engagements
"GCSE Maths - What on Earth is y = mx + c (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The standard form for equations of straight lines on graphs: y = mx + c. [--]. Understanding the components of y = mx + c. * 'm' represents the gradient of the line. * 'c' represents the y-intercept. [--]. Identifying the gradient and y-intercept directly from an equation in the form y = mx + c. [--]. Sketching a straight line graph using its gradient and y-intercept. [--]. How to rearrange linear equations that are not initially in the form y = mx + c. [--]. Interpreting"
YouTube Link 2020-10-07T09:15Z 1.2M followers, 826.3K engagements
"Ventilation Mechanism How Breathing Works Inspiration & Expiration (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The difference between ventilation and respiration. * Ventilation is the physical process of moving air in and out of the lungs (breathing). * Respiration is the chemical process in cells that releases energy. [--]. The key structures involved in the mechanism of breathing. * The roles of the ribcage lungs diaphragm and thoracic cavity. * The function of the external and internal intercostal muscles. [--]. The relationship between gas volume and"
YouTube Link 2025-12-11T15:15Z 1.2M followers, [----] engagements
"A-Level Biology - Meiosis - Stages Differences to Mitosis (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. An introduction to meiosis. * The definition of meiosis as a type of cell division. * The role of meiosis in producing four genetically different haploid cells (gametes). * The process of DNA replication and the formation of sister chromatids before meiosis begins. [--]. The stages of Meiosis I. * Prophase I: Homologous chromosomes pair up. * Metaphase I: Homologous pairs align at the cell's equator. * Anaphase I: Homologous chromosomes are separated."
YouTube Link 2025-12-05T15:30Z 1.2M followers, [----] engagements
"GCSE Physics - Acceleration - Rate of Change in Velocity Equations (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of acceleration as the rate of change in velocity. [--]. How to calculate acceleration using the formula a = (v - u) / t. * Includes a worked example of a car accelerating. [--]. Acceleration as a vector quantity. * Discusses negative acceleration (deceleration). * The difference between average and uniform (constant) acceleration. [--]. An alternative formula for acceleration: v - u = 2as. * Useful for questions involving distance"
YouTube Link 2025-09-19T14:15Z 1.2M followers, 34.4K engagements
"GCSE Physics - Particle Theory & States of Matter Solids Liquids & Gases (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to the three states of matter and the particle theory model. [--]. Properties of solids based on particle arrangement and forces of attraction. * The process of melting. [--]. Properties of liquids based on particle arrangement and forces of attraction. * The processes of boiling and evaporation. [--]. Properties of gases based on particle arrangement and forces of attraction. * Understanding the random motion of gas particles."
YouTube Link 2025-12-16T15:15Z 1.2M followers, 10.7K engagements
"Atoms & Ions Protons Neutrons Electrons Check out our website https://www.cognito.org/ This video is suitable for: - All tiers - All exam boards - Triple and combined science *** WHAT'S COVERED *** [--]. Introduction to Atoms * The fundamental nature of atoms as the particles constituting all matter. * The vast quantity of atoms present in everyday materials including biological cells. [--]. Atomic Structure Overview * The main components of an atom: a central nucleus and orbiting electrons. * The arrangement of electrons in shells or energy levels around the nucleus. [--]. Subatomic Particles"
YouTube Link 2025-05-25T15:17Z 1.2M followers, 264K engagements
"GCSE Chemistry - Factors Affecting the Rate of Reaction This video covers: - Collision theory and how it relates to the rate of reaction - The effect of temperature - The effect of concentration and pressure - The effect of surface area - The effect of catalysts"
YouTube Link 2019-04-08T13:10Z 1.1M followers, 819.4K engagements
"GCSE Chemistry - Relative Formula Mass Mr & Percentage Mass Calculations https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Relative Atomic Mass (Ar) * The difference between Mass Number and Relative Atomic Mass. * How Ar is the average mass of an element's isotopes. [--]. Relative Formula Mass (Mr) * How to calculate the Mr of a compound by adding the Ar of all its atoms. * Worked example: calculating the Mr of Magnesium Chloride. * Worked example: calculating the Mr of Sulfuric Acid. [--]. Percentage Mass of an Element in a Compound * The formula for calculating the percentage mass of an element."
YouTube Link 2025-06-25T14:15Z 1.1M followers, [---] engagements
"A-Level Biology - Proteins: Amino Acids Dipeptides How to Test for Proteins (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Structure and Functions of Proteins * How amino acid monomers join to form dipeptides and polypeptides. * An overview of key functions including enzymes antibodies transport proteins structural components hormones and muscle fibres. [--]. The Structure of Amino Acids * The general chemical structure of an amino acid including the central carbon amino group carboxyl group and the variable R group. * An explanation of how the R"
YouTube Link 2025-10-15T14:30Z 1.1M followers, [---] engagements
"GCSE Biology - Plant Hormones - Uses of Auxin Gibberellin and Ethene #53 This video covers: - How we can use plant hormones to control growth in plants - How we can use Auxins to stimulate plants to grow or kill weeds - Uses of Gibberellin to control dormancy induce flowering and grow larger fruit - How we can use ethene to control the ripening of fruit Exam board specific info: AQA - Separate/triple and higher tier only IGCSE Edexcel - Not in your course Edexcel - Separate/triple and higher tier only OCR 21st Century - Separate/triple and higher tier only OCR Gateway - Separate/triple and"
YouTube Link 2023-10-23T00:11Z 583K followers, 100.6K engagements
"GCSE Physics - What is Pressure This video covers: - What pressure is - How to calculate it using the equation: p = F/A General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel - Triple (separate) science only OCR 21st Century - Triple (separate) science only OCR Gateway - Triple (separate) science only GCSE Chemistry"
YouTube Link 2019-11-21T14:57Z 1.1M followers, 441.2K engagements
"GCSE Maths - Parallel Lines https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Parallel Lines [--]. Identifying the Gradient of a Line * Using the standard equation y = mx + c where m is the gradient. * Rearranging equations into the y = mx + c format before finding the gradient. [--]. Finding the Equation of a Line Parallel to Another *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - All on your course *** CHAPTERS *** 0:00 Intro: What are Parallel"
YouTube Link 2020-11-01T09:45Z 1.1M followers, 73.1K engagements
"GCSE Physics - Ultrasound - Prenatal Scanning Industrial Imaging Sonar (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of ultrasound * Sound waves with frequencies above [-----] Hz beyond the range of human hearing. * How ultrasound waves are produced using electrical devices. [--]. The principle of how ultrasound imaging works * Explanation of partial reflection at boundaries between different media. * How reflected waves are detected and used to calculate distances to create an image. [--]. Applications of ultrasound technology * Prenatal"
YouTube Link 2025-10-15T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - How Human Waste Reduces Biodiversity - Explained We explain what you need to know about how biodiversity suffers as a result of human activity"
YouTube Link 2019-01-25T13:39Z 1M followers, 119.8K engagements
"GCSE Biology - Biotic and Abiotic Factors An important part of any ecosystem are the biotic (living) and abiotic (non-living) factors. This video explore what each of them are and how to identify them. To learn more about ecosystems in general check out our other video on interdependence community and competition: https://www.youtube.com/watchv=XVD5izWXmKo"
YouTube Link 2019-01-21T13:09Z 1M followers, 412.7K engagements
"A-Level Biology - Carbohydrates: Monosaccharides & Disaccharides (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What carbohydrates are * The elemental composition of carbohydrates (carbon hydrogen and oxygen). * The main functions of carbohydrates in living organisms including energy supply energy storage structural components and cellular recognition. * An introduction to the three main types of carbohydrates: monosaccharides disaccharides and polysaccharides. [--]. An overview of monosaccharides * Definition of monosaccharides as simple sugars. * How"
YouTube Link 2025-10-03T14:30Z 1.1M followers, [----] engagements
"GCSE Chemistry - Reactivity Series of Metals & Displacement Reactions When metals react they lose their outermost electrons. This video covers which metals are the most and least reactive & also how we can determine reactivity by reacting them with acids and water. Then at the end we cover displacement reactions of metals"
YouTube Link 2019-03-14T14:11Z 1.1M followers, 672.8K engagements
"A Level Biology - Carbohydrates: Monosaccharides & Disaccharides Practice this content on our platform: www.Cognitoedu.org In this video we cover: [--]. What carbohydrates are [--]. What monosaccharides are [--]. And finally what disaccharides are as well as how theyre formed & broken down This video is suitable for the following A Level courses: AQA OCR CIE (content relevant to almost all similar courses) Chapters: 0:00 Introduction 0:23 [--] Types of Biological Molecule 1:41 Monomers & Polymers 2:56 Lipids Are Not Polymers 3:17 Condensation & Hydrolysis Reactions A Level Biology playlist:"
YouTube Link 2025-03-04T15:46Z 979K followers, [----] engagements
"GCSE Biology - Selective Breeding Selective breeding is the process of choosing the best animals and plants and breeding them together in the hope of getting even better offspring. Learn how it all works and why we do it in this video"
YouTube Link 2019-01-11T13:21Z 1M followers, 247.9K engagements
"GCSE Biology - Exercise & Oxygen Debt (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Energy requirements during exercise. * Increased cellular respiration for muscle contraction. [--]. How the body increases oxygen supply. * Changes in breathing rate and volume. * Changes in heart rate. [--]. Aerobic and anaerobic respiration in muscles. * Conditions leading to anaerobic respiration. [--]. Lactic acid and oxygen debt. * Production of lactic acid during anaerobic respiration. * Muscle fatigue. * Repayment of oxygen debt and removal of lactic acid via the liver."
YouTube Link 2025-03-05T15:13Z 1.1M followers, 47.3K engagements
"GCSE Biology - Inherited Disorders Polydactyly Cystic Fibrsosis https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Inherited Disorders * Definition as conditions passed on via alleles from parents. [--]. Polydactyly * Condition resulting in extra fingers or toes. * Caused by a dominant allele. * Explanation of inheritance using a genetic diagram (heterozygous x homozygous recessive cross). * Calculating probability of inheritance. [--]. Cystic Fibrosis * Disorder of cell membranes causing thick sticky mucus. * Affects lungs and pancreas primarily. * Caused by a recessive allele. * Explanation of"
YouTube Link 2025-04-23T15:13Z 1.1M followers, [----] engagements
"How to Add and Subtract Fractions https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to add and subtract fractions. [--]. Worked examples demonstrating fraction addition and subtraction. * Includes handling improper fractions. * Includes converting mixed numbers to improper fractions before calculating. * Simplifying the final fraction answer where necessary. *** EXAM BOARD INFO *** Suitable for courses across the world including all KS3 and GCSE courses in the UK. *** CHAPTERS *** 0:00 Intro & Key Rules 0:32 Example [--] 2:40 Example [--] 4:18 Example [--] 5:37 Example [--] *** PLAYLISTS ***"
YouTube Link 2020-04-20T09:15Z 1.1M followers, 119.2K engagements
"GCSE Biology - Deforestation & Land Use https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The importance and diverse human uses of land as a finite resource. * Examples of land use: building towns and cities quarrying farming and waste disposal. * Consequences of human land use: reduced land availability for other organisms and environmental damage. [--]. Deforestation: the process of clearing forests. * Primary reasons: clearing land for agriculture (cattle ranching crop cultivation including rice and biofuels) and logging for timber and fuel. * Key environmental impacts: reduction in"
YouTube Link 2025-05-19T15:37Z 1.1M followers, [----] engagements
"GCSE Physics - Reducing Energy Loss - Insulation / Lubrication / Aerodynamics In this video we cover: - How we reduce heat loss from homes - How cavity walls work - How double glazing works - How to reduce friction using lubrication - Why vehicles are streamlined General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - You also need to know about Sankey diagrams Edexcel - You also need to know about Sankey diagrams OCR 21st Century - You also need to know about Sankey diagrams OCR Gateway - Everything is"
YouTube Link 2019-06-27T12:21Z 1.1M followers, 272.6K engagements
"GCSE Biology - Osmosis #8 In this video you'll learn: - What osmosis is - Some examples of osmosis in the blood"
YouTube Link 2018-10-12T12:56Z 630K followers, 404.1K engagements
"GCSE Chemistry - Allotropes - Graphene and Fullerenes This video covers the structure and uses of graphene and fullerenes - like nanotubes and the buckminsterfullerene. Remember allotropes are different structural forms of the same element in the same physical state. You can see our video on the other carbon allotropes here: https://www.youtube.com/watchv=tGH0mXCcEFU"
YouTube Link 2019-02-22T12:07Z 1.1M followers, 299.5K engagements
"GCSE Physics - Internal Energy and Specific Heat Capacity This video covers: - What internal energy is - Relationship between kinetic energy internal energy and temperature - What specific heat capacity is - How to use specific heat capacity in an equation General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Separate science and higher tier only Edexcel -"
YouTube Link 2019-10-06T09:46Z 1.1M followers, 484.9K engagements
"GCSE Chemistry - Covalent Bonding This video covers how covalent bonding works how to show it with dot and cross diagrams and the types of substances that covalent bonds can form"
YouTube Link 2019-02-19T15:03Z 1.1M followers, 1.2M engagements
"How to Add or Subtract Numbers in Standard Form (Part 4/4) https://www.cognito.org/ *** WHAT'S COVERED *** [--]. How to add and subtract numbers written in standard form without using a calculator. [--]. Converting numbers in standard form to have the same power of [--]. [--]. Ensuring the final answer is correctly written in standard form. [--]. Worked examples including: * Addition and subtraction. * Cases where powers are initially the same. * Cases where powers are initially different (including positive and negative powers). * Cases where the initial result needs conversion back into standard form."
YouTube Link 2020-06-04T09:45Z 1.1M followers, 189.9K engagements
"GCSE Biology - Immune System (Defences Against Pathogens) #38 In this video we take a look at our bodies defences against pathogens. Including the physical and chemicals barriers and our immune system"
YouTube Link 2018-12-06T14:43Z 936K followers, 402.8K engagements
"GCSE Chemistry - What is Ionic Bonding How Does Ionic Bonding Work Ionic Bonds Explained Everything you need to know about ionic bonding Ionic bonds form when one atom transfers electron/s to another atom so that both atoms forms oppositely charged ions. These ions are then attracted to each other by electrostatic forces which we call an ionic bond. The video is based on the AQA 9-1 GCSE course but is suitable for all exam boards and for both combined and triple/separate science"
YouTube Link 2019-02-15T14:03Z 1.1M followers, 1.3M engagements
"GCSE Physics - Seismic Waves - P-waves & S-waves (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Seismic Waves * P-waves (Primary waves) are longitudinal and can travel through solids and liquids. * S-waves (Secondary waves) are transverse and can only travel through solids. [--]. Earth's Internal Structure * How scientists use seismometers to detect waves and analyse their paths. * The behaviour of seismic waves including reflection and refraction as they travel through different layers of the Earth. [--]. Evidence from Seismic Waves * How the paths of"
YouTube Link 2025-10-16T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - Factors Affecting the Rate of Photosynthesis Limiting Factor Graphs https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Factors affecting the rate of photosynthesis. * Light intensity. * Temperature. * Carbon dioxide concentration. * Amount of chlorophyll. [--]. The role of chlorophyll in photosynthesis. * Factors affecting chlorophyll levels (disease environment nutrients). [--]. Limiting factors for photosynthesis. * How light intensity carbon dioxide and temperature limit the rate. * Graphical representation of limiting factors. * Explanation of graph shapes (initial increase"
YouTube Link 2025-03-26T15:38Z 1.1M followers, 34.8K engagements
"GCSE Chemistry - Nanoparticles This video covers: - What nanoparticles are and why they're useful - The uses of nanoparticles e.g. as catalysts in nano-medicine and in electrical circuits - The risks of nanoparticles - How silver particles are used in suncreams and the possible health risks Exam board specific info: AQA - This video is only for the separate/triple science course IGCSE Edexcel - Not in your course Edexcel - This video is only for the separate/triple science course OCR 21st Century - Everything is relevant to your course OCR Gateway - This video is only for the separate/triple"
YouTube Link 2020-01-16T13:00Z 984K followers, 211.6K engagements
"GCSE Chemistry - History of the Atom #6 For the updated video - please click link below: https://www.youtube.com/watchv=sG6QoLxwIw4&t"
YouTube Link 2019-02-08T14:53Z 628K followers, 155.5K engagements
"GCSE Maths - Expanding Triple Brackets https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Expanding triple brackets. [--]. Step-by-step worked examples of expanding triple brackets. [--]. Demonstration that the order in which brackets are multiplied does not change the final answer. *** EXAM BOARD INFO *** KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro: What Are Triple Brackets 0:25 Overview of Method 1:01 Example [--] 3:03 Example [--] *** PLAYLISTS ***"
YouTube Link 2020-06-24T09:00Z 1.1M followers, 152.8K engagements
"GCSE Physics - Efficiency In this video we cover: - The idea that devices aren't 100% efficient - What efficiency is - The equation for efficiency - Examples of how to calculate efficiency - Why some devices like electric heaters are sometimes considered to be 100% efficient General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant"
YouTube Link 2019-07-03T12:26Z 1.1M followers, 439K engagements
"GCSE Physics - Electromagnetic Waves In this video we cover the following: - The [--] different types and order of the waves in the electromagnetic spectrum - The phrase ROYGBIV to help you remember the order of colours in the visible light spectrum - The inverse relationship between wavelength and frequency as you move through the spectrum - What sort of things emit these waves - That when waves contact with an object they can be reflected absorbed or transmitted - or some combination of the three"
YouTube Link 2019-12-29T15:00Z 1.1M followers, 849.3K engagements
"GCSE Biology - What Is Blood Made of / What Does Blood Do #25 Ever wondered what your blood is made of Red blood cells white blood platelets and plasma Learn what each of these components does and how we can replace it with artificial blood"
YouTube Link 2018-11-21T13:06Z 743K followers, 336.4K engagements
"GCSE Chemistry - Addition Reactions of Alkenes https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Alkenes [--]. Addition Reactions of Alkenes [--]. Specific Addition Reactions * Reaction with Hydrogen (Hydrogenation). * Reaction with Water (Steam/Hydration). * Reaction with Halogens. [--]. Test for Alkenes *** EXAM BOARD INFO *** AQA - Separate/triple science only IGCSE Edexcel - Everything is relevant to your course Edexcel - Separate/triple science only OCR 21st Century - Separate/triple science only OCR Gateway - Separate/triple science only *** CHAPTERS *** 0:00 Introduction to"
YouTube Link 2020-02-27T13:00Z 1.1M followers, 403.7K engagements
"GCSE Maths - Types of Number Sequences - Arithmetic vs Geometric https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Number Sequences. [--]. Arithmetic Sequences. [--]. Geometric Sequences. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course *** CHAPTERS *** 0:00 Intro to Number Sequences 0:15 Example 1: Finding the Pattern (Adding) 0:49 Example 2: Finding the Pattern (Subtracting) 1:12 Arithmetic Sequences & Common Difference 1:56 Geometric Sequences 2:09"
YouTube Link 2020-08-18T09:00Z 1M followers, 161.4K engagements
"GCSE Physics - Elastic Potential Energy and F = ke Equations #45 This video covers: - How to use the F = ke equation - What the spring constant k really means (how stiff the object is) - How to use the EPE = [---] k e2 equation (EPE is elastic potential energy) - That the gradient of a force-extension graph is k - That the area under the curve of a force-extension graph is EPE Remember that extension is sometimes represented as an 'x' rather than as an 'e'. General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined"
YouTube Link 2019-11-14T13:02Z 872K followers, 206.1K engagements
"GCSE Physics - Ultrasound https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Ultrasound [--]. How Ultrasound Works * Generation using electrical devices. * Partial reflection at boundaries between different mediums. [--]. Applications of Ultrasound * Pre-natal scanning for foetal imaging. * Industrial imaging to detect internal flaws in materials. * Sonar for measuring distances underwater. [--]. Calculations with Ultrasound *** EXAM BOARD INFO *** AQA - Separate/triple science and higher tier only IGCSE Edexcel - Not really in your course Edexcel - Separate/triple science and higher"
YouTube Link 2020-03-04T13:00Z 1.1M followers, 183.1K engagements
"GCSE Chemistry - Fuel Cells https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Fuel Cells [--]. Structure of the Hydrogen-Oxygen Fuel Cell * Components: Electrolyte negative anode positive cathode. * Compartments inlets for hydrogen and oxygen and outlet for water. [--]. How Hydrogen-Oxygen Fuel Cells Work [--]. Chemical Equations * Half equation at the anode (oxidation of hydrogen). * Half equation at the cathode (reduction of oxygen). * Overall balanced chemical equation for the reaction. [--]. Pros and Cons of Hydrogen-Oxygen Fuel Cells *** EXAM BOARD INFO *** AQA - Separate/triple"
YouTube Link 2020-02-20T12:45Z 1.1M followers, 409.8K engagements
"GCSE Biology - Transport in plants - Translocation (Phloem) and Transpiration (Xylem) #51 Learn how plants transport sugars via the phloem (translocation) and water via the xylem (transpiration) between the roots and leaves. We also cover the factors that affect the rate of transpiration: light intensity temperature humidity and air flow"
YouTube Link 2018-11-29T13:05Z 869K followers, 752.7K engagements
"GCSE Physics - Liquid Pressure & Upthrust This video covers: - How water creates pressure - How to calculate the pressure of a submerged object (P = hpg) - What determines if something floats or sinks - What upthrust is General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Separate science (triple) and higher tier only IGCSE Edexcel - You don't need to know about upthrust but everything else in suitable for everyone"
YouTube Link 2019-11-24T13:59Z 994K followers, 218.9K engagements
"IMPORTANT - The Cognito Platform Has Launched https://cognitoedu.org - Today we officially launched the Cognito platform. The platform's been designed to make your learning and revision as quick and easy as possible. All your progress is automatically tracked so you can immediately see what you need to learn and all the content is delivered in a straight-forward no-fluff way. We really hope this helps you out and if you could do us a favour by letting everyone know it exists we'd be really grateful. Thank you so much for your support and if you have any feedback please let us know. We read"
YouTube Link 2021-10-03T09:00Z 1.1M followers, 530.3K engagements
"GCSE Physics - Introduction to Energy Sources In this video we cover: - How our sources of energy have changed throughout human history - Where we use most of our energy today i.e. transport and domestic - How renewable is our electricity (spoiler alert. not very) General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your"
YouTube Link 2019-07-06T07:47Z 1.1M followers, 336.1K engagements
"GCSE Physics - Components This video covers: - The symbols of all the main components you need to know - What LEDs are - The graphs and uses of LDRs and thermistors General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
YouTube Link 2019-09-17T12:54Z 992K followers, 241.3K engagements
"GCSE Biology - What is Cancer 'Benign' and 'Malignant' Tumours Explained Benign and malignant tumours are very different problems. In fact only malignant ones are considered tumours. Find out why and explore the risk factors for cancer"
YouTube Link 2018-11-27T13:08Z 985K followers, 155.3K engagements
"GCSE Maths - Congruent Shapes (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Congruent Shapes. [--]. Identifying Congruent Shapes. [--]. Worked Examples: * Identifying shapes congruent to a given shape. * Finding pairs of congruent shapes from a selection. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-level - Not in your course *** CHAPTERS *** 0:00 Intro & Definition 0:31 Example 1: Identifying Congruent Shapes"
YouTube Link 2021-03-28T09:30Z 1.1M followers, 60.3K engagements
"GCSE Biology - Genetic Diagrams Punett Squares https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to Genetic Diagrams * Showing combinations of alleles from two parents. [--]. Representing Alleles * Using letters (capital for dominant lowercase for recessive). * Example gene: mouse muscularity (Normal vs Muscular). [--]. How to Draw Genetic Diagrams (5 Key Steps) * Parents' phenotype and genotype. * Gametes' genotype. * Offsprings' genotype and phenotype. [--]. Example 1: Crossing Homozygous Parents * Homozygous normal (AA) crossed with homozygous muscular (aa). * Determining gametes and"
YouTube Link 2025-04-22T14:47Z 1M followers, [----] engagements
"GCSE Biology - Endocrine System & Hormones The endocrine system is a collection of glands that secrete hormones. Learn all about the different glands you need to know and how hormones work"
YouTube Link 2018-12-20T13:50Z 1M followers, 708.5K engagements
"GCSE Chemistry - Bond Energies - Determining if Reactions are Exothermic or Endothermic https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Bond Energy * The definition of bond energy as the energy required to break one mole of a particular covalent bond. * How bond breaking is an endothermic process that requires energy from the surroundings. * How bond formation is an exothermic process that releases energy to the surroundings. [--]. Calculating Overall Energy Change * The principle of comparing the energy needed to break bonds in the reactants with the energy released when forming bonds in the"
YouTube Link 2025-07-17T14:15Z 1.1M followers, [---] engagements
"GCSE Physics - Newtons Third Law This video covers: - Newton's third law - How it relates to the F=ma equation - The idea that the smaller mass is the one more likely to move General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
YouTube Link 2019-12-12T14:52Z 1.1M followers, 223.9K engagements
"GCSE Biology - Adaptations Structural Behavioural Functional https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Why organisms need to be adapted to their environment to survive. [--]. The three types of adaptations explained: * Structural adaptations (physical features like shape colour). * Behavioural adaptations (how an organism acts or behaves e.g. migration cooling techniques). * Functional adaptations (internal body processes like metabolism water conservation). [--]. Examples illustrating each type of adaptation in various animals (e.g. polar bears owls seals walruses elephants swallows"
YouTube Link 2025-04-29T14:12Z 1M followers, [----] engagements
"GCSE Chemistry - Electron Arrangement This video covers: 0:43 - The number of electrons per energy level 4:24 - why atoms react / why they lose or gain electrons This video is suitable for: - All tiers - All exam boards - Triple and combined science Related videos/topics: GCSE Chemistry playlist: https://www.youtube.com/watchv=fN8kH9Vvqo0&list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W GCSE Biology Playlist: https://www.youtube.com/watchv=--dIBinUdeU&list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g GCSE Physics Playlist: https://www.youtube.com/watchv=aHVJfRxeAxo&list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7"
YouTube Link 2019-02-06T21:57Z 1.1M followers, 464.1K engagements
"GCSE Physics - Momentum Part [--] of [--] - Conservation of Momentum Principle This video covers: - What momentum is - How to calculate the momentum of an object - The idea that momentum is a vector quantity - What 'the conservation of momentum principle' is - A worked example of how you can use the conservation of momentum principle to work out unknown momentum or velocity values General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific"
YouTube Link 2019-12-17T15:00Z 1.1M followers, 671.5K engagements
"GCSE Chemistry - Alkanes: properties & combustion In this video you'll learn: - The properties of alkanes and the specific trends you can observe as the length of carbon chain increases - The equation for the combustion of alkanes - How to write balanced equations for the combustion of alkanes with two worked examples"
YouTube Link 2019-04-24T12:30Z 1.1M followers, 484K engagements
"GCSE Physics - Elasticity spring constant and Hooke's Law This video covers: - The types of elasticity (compress stretch & bending) - The types of deformation (elastic & inelastic) - Hooke's Law - Idea of extension - Spring constant - Force-extension graphs General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century -"
YouTube Link 2019-11-12T14:35Z 1.1M followers, 779.7K engagements
"A-Level Biology - Carbohydrates: Polysaccharides Starch Glycogen Cellulose (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. What polysaccharides are. * Complex carbohydrates made from many monosaccharide units. * Monosaccharides are joined by glycosidic bonds. * Examples: Starch Glycogen Cellulose. * Functions: Energy storage and structural support. [--]. Structure and function of Starch. * Amylose: Unbranched chain of alpha-glucose (1-4 bonds) helical shape. * Amylopectin: Branched chain of alpha-glucose (1-4 and 1-6 bonds). * Function: Energy storage in"
YouTube Link 2025-03-28T15:24Z 1.1M followers, 18.6K engagements
"GCSE Biology - The Menstrual Cycle & Puberty Hormones do many things in the body two very important roles are controlling puberty and the menstrual cycle. Learn how these work and which hormones are involved. The next two related videos will be on: [--] - Contraception [--] - Increasing fertility with hormones i.e. in vitro fertilisation"
YouTube Link 2018-12-30T13:04Z 1M followers, 531.4K engagements
"GCSE Physics - Conservation of Energy This video covers: - Conservation of energy principle - Open vs closes systems - Examples of how energy is transferred General info: - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
YouTube Link 2019-06-18T12:11Z 1.1M followers, 510.6K engagements
"GCSE Biology - Classification Correction: When discussing the relationship between different types of bear - we mention that pandas aren't a type of bear - BUT THEY ARE Woopsie. Sorry about that - we'll fix this in the future when we update these early biology videos :)"
YouTube Link 2019-01-17T14:44Z 1M followers, 356.2K engagements
"GCSE Chemistry - Halogens and Noble Gases Learn all about the properties and trends of the group [--] (halogens) and group [--] (noble gases) elements. Including why halogens become less reactive as you go down the group and why noble gases are so unreactive. Suitable for: Combined and separate science All exam boards Paper 1"
YouTube Link 2019-02-13T16:01Z 1.1M followers, 577.1K engagements
"GCSE Biology - Nervous System and Reflex Arc In this video we cover what the nervous system is how it relies on nerve cells and synapses and what a reflex arc is"
YouTube Link 2018-12-19T13:18Z 1M followers, 896.6K engagements
"GCSE Chemistry - Le Chatelier's Principle (Higher Tier) This video covers: - Le Chatelier's Principle - i.e. the idea that when a change is made to a system at equilibrium the position of equilibrium moves to counteract the change that was made. - What happens when temperature is changed - What happens when pressure is changed - What happens when concentration is changed This video is suitable for: - Higher tier - All exam boards (in some exam boards they don't call it le Chatelier's principle but they do cover the same concepts) - Triple and combined science"
YouTube Link 2019-04-14T11:20Z 1.1M followers, 587.1K engagements
"GCSE Chemistry - Modern Periodic Table Learn who made the periodic table why he arranged the elements this way and about the important groups you need to know"
YouTube Link 2019-02-11T13:22Z 995K followers, 636K engagements
"GCSE Biology - Selective Breeding https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Selective Breeding * Breeding organisms with desirable characteristics to produce offspring with improved traits. [--]. History and Application * Use in agriculture (farming) for thousands of years. * Modern examples: high-yield cows disease-resistant crops domestic pets ornamental flowers. [--]. The Process of Selective Breeding * Selecting individuals with desired traits from existing stock. * Breeding these selected individuals together. * Repeating the process over many generations to enhance the"
YouTube Link 2025-04-25T14:09Z 1M followers, [----] engagements
"GCSE Physics - How to Draw Ray Diagrams https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Drawing ray diagrams for lenses. * Symbols for concave (diverging) and convex (converging) lenses. * Identifying the principal axis principal focus (F) and 2F points. [--]. Concave lens ray diagrams. * Rules for drawing incident and refracted rays. * Locating the virtual image. * Describing image characteristics. [--]. Convex lens ray diagrams. * Rules for drawing incident and refracted rays. * Locating the image for different object positions. * Describing image characteristics. *** EXAM BOARD INFO *** AQA -"
YouTube Link 2020-02-04T11:30Z 1.1M followers, 412.4K engagements
"A-Level Biology - Proteins: Structures - [--] Main Levels Bonds (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The four levels of protein structure and how they build upon each other. * Primary Structure: The sequence of amino acids in a polypeptide chain. * Secondary Structure: The coiling (alpha-helix) or folding (beta-pleated sheet) of the polypeptide chain. * Tertiary Structure: The further folding of the polypeptide chain into a unique 3D shape. * Quaternary Structure: The combination of two or more polypeptide chains. [--]. The different types of"
YouTube Link 2025-10-16T14:30Z 1.1M followers, [---] engagements
"GCSE Physics - Visible Light and Colour https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The Visible Light Spectrum * Acronym ROYGBIV. [--]. White and Black Light * White light as a combination of all wavelengths. * Black as the absence of light. [--]. How Object Colour is Determined * Interaction of light: absorption reflection transmission. [--]. Opaque Objects [--]. Transparent and Translucent Objects [--]. Colour Filters *** EXAM BOARD INFO *** AQA - Separate/triple science only IGCSE Edexcel - Don't need to know the details of this video only watch for general interest :) Edexcel - Separate/triple"
YouTube Link 2020-02-11T13:00Z 1.1M followers, 243.9K engagements
"GCSE Biology - Abiotic & Biotic Factors https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding Biotic Factors * Definition of biotic factors as the living components of an ecosystem that affect other organisms or shape the environment. * Examples including predation competition for resources or habitat the prevalence of disease and the availability of food. [--]. Understanding Abiotic Factors * Definition of abiotic factors as the non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. * Examples such as light intensity"
YouTube Link 2025-05-06T14:53Z 1.1M followers, 15.2K engagements
"GCSE Physics - Acceleration This video covers: - What acceleration is - The [--] equations for calculating acceleration - Average and uniform acceleration - Example questions General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course GCSE"
YouTube Link 2019-12-01T14:50Z 1.1M followers, 475K engagements
"GCSE Biology - Diabetes Type [--] & Type [--] Diabetes https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The role of insulin in regulating blood glucose levels. * How insulin is released by the pancreas. * How insulin helps cells absorb glucose and convert it to glycogen. [--]. Type [--] Diabetes. * The cause: the pancreas failing to produce sufficient insulin. * Typical onset and lifelong nature. * Treatment through insulin injections diet and exercise management. * Factors affecting insulin dosage (diet and exercise). [--]. Type [--] Diabetes. * The cause: body cells becoming resistant to insulin. * Typical"
YouTube Link 2025-04-03T15:02Z 1M followers, [----] engagements
"GCSE Chemistry - Limiting Reactants & Balanced Equations https://www.cognito.org/ *** BALANCING EQUATIONS VIDEO *** https://www.youtube.com/watchv=qquOFYOpdl0 *** WHAT'S COVERED *** [--]. The concept of limiting reactants. * The definition of a limiting reactant and a reactant in excess. * An explanation of how the limiting reactant determines the total amount of product that can be formed in a chemical reaction. [--]. How to perform calculations involving limiting reactants. * Identifying the limiting reactant in a given problem whether explicitly stated or implied. * A step-by-step method for"
YouTube Link 2025-06-30T14:15Z 1.1M followers, [---] engagements
"GCSE Maths - Solving Algebraic Inequalities with [--] Inequality Signs (Inequalities Part 3) #58 This video covers how to solve equations that contain [--] inequality signs. For example how to get and unknown letter like x by itself. This is part [--] of our [--] part series on inequalities. Part [--] - Introduction to inequalities Part [--] - Solving Algebraic Inequalities - With [--] Inequality Sign Part [--] - Solving Algebraic Inequalities - With [--] Inequality Signs (this video) Part [--] - Inequalities on Graphs This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation -"
YouTube Link 2020-09-03T09:00Z 870K followers, 131.5K engagements
"GCSE Physics - Radio Waves In this video we cover: - How radio waves can be transmitted using oscilloscopes transmitters and receivers - How the transmission of radio waves can be used to transfer information - The three different types of radio waves and how they're used Exam board specific info: AQA - Suitable for all courses IGCSE Edexcel - Suitable for all courses Edexcel - Suitable for all courses OCR 21st Century - Suitable for all courses OCR Gateway - Suitable for all courses GCSE Chemistry playlist: https://www.youtube.com/watchv=fN8kH9Vvqo0&list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W"
YouTube Link 2020-01-02T14:30Z 1.1M followers, 464.8K engagements
"GCSE Biology - Sexual vs Asexual Reproduction - What is Asexual Reproduction How do organisms reproduce Well it depends on the organism. We explore the two main types - sexual and asexual and consider the consequences of each. Cell cycle chromosomes and mitosis video: https://www.youtube.com/watchv=RHyZVmbiA78 Binary fission video: https://www.youtube.com/watchv=OAcz-tFGY0Y Meiosis video: https://youtu.be/micUPynqx9k"
YouTube Link 2019-01-02T15:02Z 1M followers, 371.8K engagements
"GCSE Chemistry - Conservation of Mass Whether we look at the mass Mr or number of atoms the mass is always conserved in chemical reactions. However it may sometimes appear as if the mass changes if some of our reactants or products are gases. We can fix this problem though by doing our reactions in a sealed container. This video is suitable for: - Higher and Foundation tiers - All exam boards (although based on AQA) - Triple and combined science"
YouTube Link 2019-03-04T13:48Z 1.1M followers, 291.6K engagements
"GCSE Maths - How to Find the Area of a Triangle https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The two main formulas for calculating the area of a triangle. [--]. How to identify the base (b) and vertical height (h) for the first formula. [--]. How to identify the two sides (a b) and the included angle (C) for the second formula. [--]. Solving problems where an extra step is needed before applying an area formula. * Using Pythagoras' theorem to find a missing side first. * Using the angle sum of a triangle (180) to find a missing angle first. *** EXAM BOARD INFO *** This video is suitable for"
YouTube Link 2025-02-12T08:15Z 1.1M followers, 18.9K engagements
"GCSE Chemistry - Atom Economy https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Introduction to chemical reactions in industry. [--]. Definition and purpose of Atom Economy. [--]. The equation for calculating Atom Economy. [--]. Worked example calculating Atom Economy. * Calculating the Mr of reactants and the desired product. * Calculating the final percentage atom economy. [--]. Interpreting Atom Economy values. [--]. Example of a reaction with 100% Atom Economy [--]. Reasons why considering Atom Economy is important. * Economic factors. * Sustainability. * Environmental factors. [--]. Potential solutions for"
YouTube Link 2020-02-06T00:00Z 1.1M followers, 139.2K engagements
"GCSE Maths - How to Find the Midpoint of a Line https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding the midpoint of a line segment. [--]. Method 1: Finding the midpoint visually on a graph. [--]. Method 2: Using the midpoint formula. [--]. Worked examples applying the midpoint formula. * Including examples with negative coordinates. * Representing answers as fractions or decimals. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - Not on your course GCSE Foundation - All on your course GCSE Higher - All on your course A-Level - All on your course ***"
YouTube Link 2020-10-25T09:00Z 1.1M followers, 204.6K engagements
"GCSE Maths - What Are Simultaneous Equations https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Understanding linear equations with two variables. * Why single linear equations with two variables have infinite solutions. * Examples of finding possible solution pairs (x y). [--]. Visualising linear equations on graphs. [--]. The concept of simultaneous equations. [--]. Introduction to the three methods for solving simultaneous equations. * Solving by plotting graphs. * Solving using the substitution method. * Solving using the elimination method. *** EXAM BOARD INFO *** This video is suitable for maths"
YouTube Link 2020-09-15T08:45Z 1.1M followers, 180.7K engagements
"GCSE Physics - Visible & Ultraviolet Light - Characteristics Uses (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Visible Light * The relationship between the colour of light and its wavelength. * How visible light is used for communication in optical fibres. * The process of transmitting encoded information using reflection in fibres. [--]. Ultraviolet (UV) Radiation * Common sources and effects of UV light including from the sun. * The scientific principle of fluorescence. * How fluorescent lights use fluorescence to produce visible light efficiently. *"
YouTube Link 2025-10-08T14:15Z 1.1M followers, [---] engagements
"GCSE Chemistry - Fuel Cells - Structure How they Work Half Equations Pros & Cons https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The function of a fuel cell as an electrochemical cell. * Converting chemical energy from a fuel and oxygen into electrical energy. * An introduction to the common hydrogen-oxygen fuel cell. [--]. The structure of a hydrogen-oxygen fuel cell. * The roles of the negative anode and positive cathode. * The function of the electrolyte and porous carbon electrodes. [--]. The chemical reactions that generate electricity. * The oxidation of hydrogen at the anode. * The"
YouTube Link 2025-07-22T14:15Z 1.1M followers, [---] engagements
"GCSE Biology - Food Chains & Predator Prey Cycles #85 For ecosystems to function they need energy; and we can see how this energy moves through ecosystems with food chains. We also explore how the populations of predators and prey vary over time with predator prey cycles"
YouTube Link 2019-01-23T13:59Z 865K followers, 141.7K engagements
"GCSE Chemistry - Development of the Periodic Table https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Dmitri Mendeleev's contribution to the periodic table * Its development in the mid-19th century * Prediction of new elements [--]. Basic structure and interpretation of the periodic table * Arrangement by increasing atomic number (number of protons) * Understanding information in element boxes (nuclear symbol atomic number mass number) [--]. Organisation into periods and groups * Periods as horizontal rows showing repeating property patterns * Groups as vertical columns with elements sharing"
YouTube Link 2025-06-04T14:12Z 1.1M followers, [----] engagements
"GCSE Chemistry - Nanoparticles - Uses Risks https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The definition of nanoparticles * An explanation of their size (1-100 nanometres) * The field of nanoscience [--]. Key properties of nanoparticles * A high surface area to volume ratio and why this occurs [--]. The various uses of nanoparticles * As catalysts to speed up chemical reactions * In nanomedicine for targeted drug delivery (e.g. fullerenes) * For creating tiny electrical circuits and computer chips * The antibacterial properties of silver nanoparticles in surgical masks and wound dressings 4."
YouTube Link 2025-06-24T14:15Z 1.1M followers, [----] engagements
"GCSE Maths - What Does Inversely Proportional Mean https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition of Inverse Proportionality. * Understanding the rate of change. [--]. Graphical Representation of Inverse Proportionality. * Recognising the characteristic downward-sloping curve. * Interpreting points on the graph in context. [--]. Algebraic Representation of Inverse Proportionality. * Expressing the relationship using the proportionality symbol. * Forming an equation using the constant of proportionality (k). * Using the inverse proportion equation to find unknown values. *** EXAM"
YouTube Link 2021-01-20T10:30Z 1.1M followers, 288.5K engagements
"GCSE Biology - Control of Blood Glucose Concentration Learn how the body controls it's blood glucose concentration using the hormones insulin and glucagon. We'll also see how these two hormones interact in a negative feedback loop"
YouTube Link 2018-12-21T14:12Z 1M followers, 512.8K engagements
"GCSE Physics - Geothermal Power This video covers: - What geothermal energy is - How it can be used to heat water or generate electricity - It's pros and cons General info: - Only relevant to AQA and IGCSE Edexcel Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Not relevant to your course :( OCR 21st Century - Not relevant to your course :( OCR Gateway - Not relevant to your course :("
YouTube Link 2019-07-21T14:17Z 1.1M followers, 171.1K engagements
"GCSE Chemistry - Formation of Ions This video covers how atoms gain or lose electrons to form ions why they bother and how to tell which ion they'll become. Based on AQA course but suitable for all exam boards"
YouTube Link 2019-02-15T13:02Z 1.1M followers, 549.9K engagements
"GCSE Chemistry - Potable Water In today's vid you'll learn: - What potable water is - How we can get it by treating fresh water sources - How we can get it by desalinating sea water"
YouTube Link 2019-05-31T12:32Z 1.1M followers, 237.3K engagements
"GCSE Biology - Exercise & Oxygen Debt #22 This video covers the effects of exercise on the body including details about respiration and the oxygen debt"
YouTube Link 2018-12-17T13:20Z 872K followers, 286.9K engagements
"GCSE Physics - Geothermal Power - How it Works Pros & Cons https://www.cognito.org/ *** WHAT'S COVERED *** [--]. The origin of geothermal energy * Thermal energy from the Earth's crust. * Sources include the initial formation of the planet and radioactive decay. [--]. How geothermal energy is harnessed * Used directly for heating homes by pumping water underground. * Used to generate electricity by converting underground water to steam to turn turbines. [--]. The advantages and disadvantages of geothermal power * Pros: renewable reliable and low pollution. * Cons: high building costs and only viable"
YouTube Link 2025-08-14T14:15Z 1.1M followers, [---] engagements
"GCSE Physics - The difference between Speed and Velocity & Distance and Displacement This video covers: - The difference between scalar and vector quantities - Why speed is scalar but velocity is a vector - The difference between distance and displacement - How to calculate speed and velocity - Common speeds you need to remember General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course"
YouTube Link 2019-11-28T13:10Z 1.1M followers, 700.4K engagements
"GCSE Chemistry - How to Find the Volume of a Gas This video covers: - How to calculate the volume of a gas using the equal: volume = moles x [--] - How to find the volume of a product when you're told the volume of a reactant Exam board specific info: AQA - Separate science and higher tier only IGCSE Edexcel - Separate science and higher tier only Edexcel - Separate science and higher tier only OCR 21st Century - Separate science and higher tier only OCR Gateway - Separate science and higher tier only GCSE Chemistry playlist:"
YouTube Link 2020-01-23T13:15Z 1.1M followers, 254.4K engagements
"GCSE Biology - Cell cycles Chromosomes & Mitosis In order to survive and grow organisms require a constant supply of new cells. In this video we explore how these cells are generated through the cell cycle with a particular focus on mitosis. We will also look at the role chromosomes play and the different forms they take. In this video we'll look at: - How new cells are generated by the cell cycle - What mitosis is and how it works - The role of chromosomes and the different forms they take"
YouTube Link 2018-09-24T14:47Z 1M followers, 692.3K engagements
"GCSE Chemistry - Metals and Non-Metals This video covers the difference between the properties of metals and non-metals and takes a look at transition metals"
YouTube Link 2019-02-12T13:11Z 1.1M followers, 636.4K engagements
"GCSE Chemistry - Rates of Reaction In this video we'll look at: - Some examples of reactions that happen at different rates - The different ways we can calculate the rate of a reaction - Some examples of calculating the rate of reaction using decimetres cubed and minutes (higher tier)"
YouTube Link 2019-04-02T13:29Z 1M followers, 726.7K engagements
"GCSE Biology - Land Use - Deforestation & Peat Bogs In this video we explore how destroying forests and peat bogs affects the environment and the consequences it has for biodiversity"
YouTube Link 2019-01-29T13:11Z 1M followers, 97.2K engagements
"GCSE Physics - Charge Current & Time This video covers: - What charge is - How to use the Q = I x t equation - Examples General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and foundation tiers - Suitable for triple and combined science Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
YouTube Link 2019-09-09T13:00Z 1.1M followers, 302.2K engagements
"GCSE Physics - Vector Diagrams and Resultant Forces This video covers: - How to represent forces with scale diagrams - Finding the resultant force from vectors - How to resolve vectors by splitting them into horizontal and vertical components General info: - Suitable for all GCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Free body diagrams are higher tier only IGCSE Edexcel - You don't need to know this content Edexcel - Drawing and using free body"
YouTube Link 2019-11-10T13:52Z 1.1M followers, 474K engagements
"GCSE Biology - Why Do We Get Heart Disease and How to Treat It - Cardiovascular Disease (CVD) Cardiovascular disease encompasses a group of diseases. Explore what each of these are and how we can treat them. Diseases: Coronary artery disease Heart attacks Faulty valves Heart failure Treatments: Stents Statins Replacement valves Replacement hearts Learn everything you need to know of GCSE Biology (based on AQA) Our video on the heart: https://www.youtube.com/watchv=zU90AkcTJEs"
YouTube Link 2018-11-22T13:42Z 995K followers, 270.8K engagements
"GCSE Maths - Finding the Equation of a Straight Line From [--] Sets of Coordinates https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Finding the equation of a straight line when given two coordinates. [--]. How to use the three-step method: * Step 1: Calculate the gradient (m) using the formula. * Step 2: Substitute the gradient (m) and one of the coordinates to find the y-intercept (c). * Step 3: Write the final equation by substituting the calculated values into y = mx + c. [--]. Two worked examples demonstrating the method. *** EXAM BOARD INFO *** This video is suitable for maths courses around"
YouTube Link 2020-10-14T09:30Z 1.1M followers, 198K engagements
"GCSE Maths - How to Plot a Straight Line Using a Table of Coordinates (2026/27 exams) Check out our website https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Plotting straight-line graphs using a table of values. [--]. How to plot graphs when the equation is not initially in the form y = mx + c. [--]. Plotting a straight-line graph only within a specified range of x-values. [--]. Why using three points is a good way to check your working. *** EXAM BOARD INFO *** This video is suitable for maths courses around the world. KS3 - All on your course GCSE Foundation - All on your course GCSE Higher - All"
YouTube Link 2020-10-18T09:00Z 1.1M followers, 139.1K engagements
"GCSE Biology - How Enzymes Work #19 Learn what enzymes are why we need them and how they work (lock and key model vs induced fit model)"
YouTube Link 2018-11-07T14:45Z 628K followers, 371.3K engagements
"GCSE Biology - Levels of Organisation - Cells Tissues Organs and Organ Systems #13 The body is complex Learn how it is organised into cells tissues organs and organ systems"
YouTube Link 2023-10-18T18:56Z 658K followers, 276.8K engagements
"A Level Biology - Carbohydrate Tests Test For Reducing & Non-Reducing Sugars Starch https://www.cognito.org/ *** WHAT'S COVERED *** [--]. Definition and examples of reducing sugars * Ability to donate electrons * Includes all monosaccharides (e.g. glucose) and some disaccharides (e.g. maltose lactose) [--]. Definition and examples of non-reducing sugars and carbohydrates * Inability to donate electrons without prior hydrolysis * Includes most disaccharides (e.g. sucrose) and all polysaccharides (e.g. starch) [--]. How to test for reducing sugars (Benedict's Test) * Procedure involving Benedict's"
YouTube Link 2025-04-24T14:30Z 1M followers, [----] engagements
"GCSE Biology - Variation and Evolution Explore all the terms around evolution including 'natural selection' 'variation' and 'survival of the fittest'. And see how Darwins came up with the theory of evolution despite not even knowing what DNA or mutation were"
YouTube Link 2019-01-10T13:19Z 1M followers, 393K engagements
"GCSE Physics - Contact and Non-Contact Forces This video covers: - What contact forces are - Examples - friction air resistance tension normal reaction force - What non-contact forces are - Examples - gravitational electrostatic magnetic General info: - Suitable for all GCSE and IGCSE courses - See below for whether it is higher or foundation tier for your exam board - See below for whether it is triple or combined for your exam board Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Not tested directly but it is helpful to understand the concepts Edexcel -"
YouTube Link 2019-11-03T13:57Z 1.1M followers, 637.8K engagements
"GCSE Physics - Kinetic Energy In this video you'll learn: - How speed and mass affect kinetic energy - How to use the kinetic energy equation General info: - You need to memorise the equation for kinetic energy - Suitable for all GCSE and IGCSE courses Exam board specific info: AQA - Everything is relevant to your course IGCSE Edexcel - Everything is relevant to your course Edexcel - Everything is relevant to your course OCR 21st Century - Everything is relevant to your course OCR Gateway - Everything is relevant to your course"
YouTube Link 2019-05-22T07:20Z 1.1M followers, 644.5K engagements
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