9.1 The Composition & Evolution of the Earth's Atmosphere
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These flashcards cover specification point 4.9.1 The Composition & Evolution of the Earth's Atmosphere in Topic 9 - Chemistry of the Atmosphere for AQA GCSE Chemistry. This includes: 4.9.1.1 The Proportions of Different Gases in the Atmosphere , 4.9.1.2 The Earth's Early Atmosphere , 4.9.1.3 How Oxygen Increased , 4.9.1.4 How Carbon Dioxide Decreased.
Last updated 6:50 AM on 3/9/26
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5 Terms
1
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How much nitrogen is approximately in the atmosphere?
80%
2
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How much oxygen is approximately in the atmosphere?
20%
3
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Other than nitrogen and oxygen, what other gases are present in the Earth’s atmosphere? (3)
Carbon dioxide
Water vapour
Noble gases
4
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no
no
5
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