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9.1 The composition and evolution of the Earth's atmosphere

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Question 9
F

Which change in the atmosphere happened at the same time as the percentage of oxygen increased?

[1]
A

The percentage of carbon dioxide decreased

B

The percentage of nitrogen decreased sharply

C

The percentage of water vapour increased

D

The percentage of noble gases decreased

Markscheme

9.1 The composition and evolution of the Earth's atmosphere Questions

  1. GCSE
  2. /Chemistry
  3. /9.1 The composition and evolution of the Earth's atmosphere

40 exam-style questions on AQA GCSE Chemistry 9.1 The composition and evolution of the Earth's atmosphere, covering 9.1.1 The proportions of different gases in the atmosphere, 9.1.2 The Earth's early atmosphere, 9.1.3 How oxygen increased, and 9.1.4 How carbon dioxide decreased. Each one has a worked solution and a mark scheme showing where the marks go.

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