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GCSE Chemistry - Evolution of the Atmosphere #67
In this video, we'll look at: - What the early atmosphere was like on earth - How that atmosphere changed to be suitable for life - The processes responsible for features of the earth we see today
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GCSE Chemistry - Conservation of Mass #26
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...
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GCSE Biology - Photosynthesis #48
Photosynthesis. What is it? How does it work? Why do plants do it? What is all that glucose used for?
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GCSE Biology - Gas Exchange and Lungs #26
Learn how the lungs and alveoli are adapted to carry out gas exchange.
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GCSE Chemistry - Alcohols #57
This video covers: - Alcohols are a homologous series of organic compounds with an OH functional group - How to name them - Their properties: flammable, soluble and they can be oxidised - Their uses: as fuels and solvents Exam board...
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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.
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GCSE Biology - Specialised Exchange Surfaces
This video covers: - What exchange surfaces are - The key features of exchange surfaces - Specific examples including alveoli, villi, root hair cells, and leaves
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GCSE Biology - Exercise & Oxygen Debt #22
This video covers the effects of exercise on the body, including details about respiration and the oxygen debt.
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GCSE Biology - Blood Vessels #24
Learn the roles of arteries, capillaries and veins and how they are adapted to those roles; as well how to calculated the rate of blood flow.
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GCSE Chemistry - Electrolysis P2 - Electrolysis to Extract Metals From Oxides - Explained #41
This video covers: - How to extract reactive metals from their oxides using electrolysis - Recap of extracting unreactive metals with 'reduction by carbon' - The specific example of extracting aluminium from aluminium oxide - Writing...
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GCSE Chemistry - Differences Between Compounds, Molecules & Mixtures #3
This video covers: 0:21 - What a molecule is 1:11 - What a compound is 3:11 - How to use brackets in a chemical formula 4:48 - What a mixture is This video is suitable for: - All tiers - All exam boards - Triple and combined science
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GCSE Chemistry - Air Pollution #70
In this video, we cover: - What air pollution is - What substances count as air pollutants - How those substances are made - Why they're harmful / the problems they cause
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GCSE Biology - The Heart #23
This video covers the structure and function of the heart, the double circulatory system, the associated blood vessels, pacemaker cells and the coronary arteries.
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GCSE Chemistry - What is Corrosion and How to Stop it #71
This video covers: - Why do things rust? What are the conditions for rusting? - Whats the chemical equation for rusting? - Corrosion experiment - How to prevent rusting by using the barrier method or sacrificial method - What is...
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GCSE Chemistry - What is a Limiting Reactant? Limiting/Excess Reactants Explained #27
Limiting and Excess Reactants Explained. Often, in chemical reactions there will be less of one reactant that the other - we call this one the limiting reactant because how much reaction can take place. Whereas the more abundant reactant...
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GCSE Chemistry - Relative Formula Mass #24
This video covers how to find the 'relative formula mass', which is the sum of the relative atomic masses of all the atoms within a molecule or compound. It also covers how to find the the percentage mass of a particular element in a...
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GCSE Chemistry - Oxidation and Reduction - Redox Reactions #39 (Higher Tier)
In this video we cover: - Oxidation and reduction in terms of oxygen and electrons - Redox reactions - Displacement reactions - Ionic equations - Half equations This video is suitable for: - Higher tier only - All exam boards - Triple...
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GCSE Chemistry - Group 1 Alkali Metals #11
What are alkali metals? Why are they so reactive? What are the trends as you go down the group? How do they react with water, oxygen and chlorine? Learn all this and more!
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GCSE Chemistry - Fuel Cells #45
This video covers: - What fuel cells are - How they work - How to write half equations and full equations for fuel cells - The pro's and con's of hydrogen fuel cells Exam board specific info: AQA - Separate/triple science only IGCSE...
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GCSE Chemistry - Waste Water #57
In today's video we'll cover: - What waste water is - The different sources of waste water - How we can treat waste water
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GCSE Chemistry - The Mole (Higher Tier) #25
This video covers the term 'mole', explains 'Avogadros constant', and runs through examples of the sort of calculations you might have to do with moles. This video is suitable for: - Higher tier only - All exam boards - Triple and...
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GCSE Chemistry - Percentage Yield #33
This video covers: - The difference between 'actual yield' and 'theoretical yield' - Why the actual yield may be less than the theoretical yield - How to calculate the percentage yield Exam board specific info: AQA - Separate/triple...
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GCSE Physics - Atmospheric Pressure #50
This video covers: - Which gases make up our atmosphere - Why atmosphere pressure decreases with increasing altitude - Why it is difficult to breathe at high altitudes General info: - Suitable for all GCSE courses - See below for whether...
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GCSE Chemistry - How to Test for Gases - Testing for Chlorine / Oxygen / Hydrogen / CO2 #64
In this video, you'll learn: - The test for detecting chlorine gas - The test for detecting oxygen gas - The test for detecting hydrogen gas - The test for detecting carbon dioxide gas