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9.1 The composition and evolution of the Earth's atmosphere

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Question 3

Some homes are heated using natural gas. Long ago, carbon atoms now in this fuel were present in the atmosphere as carbon dioxide.

a.

What collective name is given to natural gas, coal and crude oil?

[1]
b.

Name the process that moved carbon from atmospheric carbon dioxide into living biomass.

[1]
c.

Describe what happened after this biomass died to produce a long-term store of carbon in natural gas.

[2]
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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