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9.1 The composition and evolution of the Earth's atmosphere

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Question 16

A volcanic-atmosphere model estimates that the percentage of nitrogen in the atmosphere became 320 times greater between an earlier stage and a later stage of Earth's history. At the later stage, nitrogen made up 80% of the atmosphere.

What percentage of the atmosphere did nitrogen make up at the earlier stage, according to the model?

[1]
A

0.025%

B

0.25%

C

2.5%

D

4%

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

79 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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