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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 17

The Earth's early atmosphere contained a very high percentage of carbon dioxide. Explain how the formation of oceans decreased the percentage of carbon dioxide in the atmosphere.

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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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