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9.1 The composition and evolution of the Earth's atmosphere

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Question 1
F

The table shows the approximate percentage of two gases in the Earth's atmosphere today.

Table: The approximate percentage of two gases in the Earth's atmosphere today

GasPercentage (%) of the atmosphere
Nitrogen
Oxygen
a.

Complete the table.

[2]
b.

Name two other gases that are found in the Earth's atmosphere today.

[2]
c.

Give the length of time for which the proportions of the gases in the Earth's atmosphere have been much the same as they are today.

[1]
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

40 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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