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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 20

The Earth's atmosphere today is a mixture of different gases.

Which of these options lists the three most abundant gases in clean, dry air, in order from the highest percentage to the lowest percentage?

A

oxygen, nitrogen, carbon dioxide

B

nitrogen, oxygen, argon

C

nitrogen, carbon dioxide, oxygen

D

oxygen, nitrogen, argon

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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