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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 31

Carbon dioxide is a greenhouse gas found in the Earth's atmosphere.

Various physical and chemical processes can alter the concentration of carbon dioxide in the atmosphere.

Draw one straight line from each change in the amount of carbon dioxide to the process causing the change.

change in the amount of carbon dioxide

  • increase
  • decrease

process causing the change

  • photosynthesis in plants
  • combustion of natural gas
  • cracking of long-chain hydrocarbons
  • deposition of sand on beaches
  • melting of polar ice caps
[2]
Markscheme

9.2 Earth and atmospheric science Questions

  1. GCSE
  2. /Chemistry
  3. /9.2 Earth and atmospheric science

97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.

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