GCSE Chemistry OCR B J258

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C1.1
How has the Earth's atmosphere changed over time, and why?
C1.2
Why are there temperatures changes in chemical reactions?
C1.3
What is the evidence for climate change, why is it occurring?
C1.4
How can scientists help improve the supply of potable water?
C2.1
How have our ideas about atoms developed over time?
C2.2
What does the Periodic Table tell us about the elements?
C2.3
How do metals and non-metals combine to form compounds?
C2.4
How are equations used to represent chemical reactions?
C2.5
What are the properties of transition metals?
C3.1
How are the atoms held together in a metal?
C3.2
How are metals with different reactivities extracted?
C3.3
What are electrolytes and what happens during electrolysis?
C3.4
Why is crude oil important as a source of new materials?
C4.1
How is data used to choose a material for a particular use?
C4.2
What are the different types of polymers?
C4.3
How do bonding and structure affect properties of materials?
C4.4
Why are nanoparticles so useful?
C4.5
What happens to products at the end of their useful life?
C5.1
How are chemicals separated and tested for purity?
C5.2
How do chemists find the composition of unknown samples?
C5.3
How are the amounts of substances in reactions calculated?
C5.4
How are the amounts of chemicals in solution measured?
C6.1
What useful products can be made from acids?
C6.2
How do chemists control the rate of reactions?
C6.3
What factors affect the yield of chemical reactions?
C6.4
How are chemicals made on an industrial scale?
C7.IaS1
What needs to be considered when investigating a phenomenon scientifically?
C7.IaS2
What conclusions can we make from data?
C7.IaS3
How are scientific explanations developed?
C7.IaS4
How do science and technology impact society?
C8.PAG
Practical skills