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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 22

Nitrogen is the most abundant gas in the Earth's atmosphere today. What is the approximate percentage of the second most abundant gas, oxygen, in today's dry atmosphere?

A

0.04%0.04\%0.04%

B

0.9%0.9\%0.9%

C

21%21\%21%

D

78%78\%78%

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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