GCSEOCRJ260

OCR GCSE Combined Science B (Twenty First Century Science) — Chemistry — Foundation (J260)

Explore the **Foundation-tier chemistry content** within OCR Combined Science B (Twenty First Century Science), **J260**. Follow the course and tier confirmed by your school.

C1.1How has the Earth’s atmosphere changed over time, and why?

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C1.2Why are there temperature changes in chemical reactions?

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C1.3What is the evidence for climate change, why is it occurring?

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C1.4How can scientists help improve the supply of potable water?

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C2.1How have our ideas about atoms developed over time?

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C2.2What does the Periodic Table tell us about elements?

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C2.3How do metals and non-metals combine to form compounds?

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C3.1How are the atoms held together in a metal?

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C3.2How are metals with different reactivities extracted?

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C3.3What are electrolytes and what happens during electrolysis?

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C4.1How is data used to choose a material for a particular use?

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C4.2How do bonding and structure affect properties of materials?

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C4.3Why are nanoparticles so useful?

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C5.1How are chemicals separated and tested for purity?

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C5.2How are the amounts of substances in reactions calculated?

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C5.3How are the amounts of chemicals in solution measured?

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C6.1What useful products can be made from acids?

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C6.2How do chemists control the rate of reactions?

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C6.3What factors affect the yield of chemical reactions?

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IaS1What needs to be considered when investigating a phenomenon scientifically?

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IaS2What processes are needed to draw conclusions from data?

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IaS3How are scientific explanations developed?

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