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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 35

Explain how the rapid proliferation of photosynthetic marine organisms during the Great Oxidation Event altered the atmospheric percentages of carbon dioxide and oxygen.

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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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