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9.1 The composition and evolution of the Earth's atmosphere

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Question 7
F

Crude oil and natural gas were formed from the remains of which organisms?

[1]
A

Trees buried in thick swamp deposits

B

Algae floating at the top of the oceans

C

Shells settling slowly on the sea bed

D

Plankton buried under the sea bed

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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