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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 52

The average concentration of methane (CH4\text{CH}_4CH4​) in the Earth's atmosphere is commonly measured in parts per billion (ppb).

The table below shows the average concentration of methane in the atmosphere in July 2002 and in July 2022.

DateAverage concentration of methane in ppb
July 20021774.83
July 20221915.48

Calculate the increase in the average concentration of methane in the atmosphere, in ppb, from July 2002 to July 2022.

Give your answer to the nearest whole number.

[2]
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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