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9.1 The composition and evolution of the Earth's atmosphere

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Question 5

A classroom contains green plants beside a sunny window. A student considers the changes in the amounts of carbon dioxide and oxygen caused by photosynthesis.

Which statement describes these changes?

[1]
A

The amount of carbon dioxide increases and the amount of oxygen decreases.

B

The amounts of carbon dioxide and oxygen both decrease.

C

The amounts of carbon dioxide and oxygen both increase.

D

The amount of carbon dioxide decreases and the amount of oxygen increases.

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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