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9.1 The composition and evolution of the Earth's atmosphere

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Question 13
F

How did the formation of the oceans reduce the proportion of carbon dioxide in the atmosphere?

[1]
A

Carbon dioxide reacted with the water to produce oxygen and carbonates

B

Carbon dioxide was used by algae in the water to make sedimentary rock

C

Carbon dioxide condensed with the water vapour and fell as rain to the sea

D

Carbon dioxide dissolved in the water and carbonates were precipitated

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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