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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 30

The early atmosphere of the Earth was formed by gases released from intense volcanic activity.

Table 1 shows the relative abundances of some gases in Earth's early atmosphere.

GasRelative abundance in early atmosphere
Water vapourLarge
Carbon dioxideLarge
NitrogenSmall
AmmoniaTrace

Explain why the amount of water vapour in the atmosphere decreased significantly over geological time.

[2]
Markscheme

9.2 Earth and atmospheric science Questions

  1. GCSE
  2. /Chemistry
  3. /9.2 Earth and atmospheric science

97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.

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