Chemistry A (9-1) - Gateway Science Suite J248 9-1: Global challenges Topical Past Paper Questions
OCR GCSE (9-1) Chemistry A (9-1) - Gateway Science Suite J248 (9-1) past-paper questions on Global challenges, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
The Earth's early atmosphere is thought to have been mainly carbon dioxide, with smaller amounts of water vapour. (a) Describe how the amounts of these gases changed over time to develop an oxygen-rich atmosphere. (b) The graph shows how the percentages of different gases in the…
A life-cycle assessment looks at the potential environmental impact at each stage of the life of a product. A car manufacturer does a life-cycle assessment for cars made from • steel • aluminium. The table gives information about the life-cycle impact of cars made from steel and…
This question is about polymers. (a) Many biological substances are polymers. Complete the table to state the type of monomer which forms each of the biological polymers. (b) Look at the structure of the polymer called poly(styrene). [3] This polymer is made from a monomer. Draw…
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