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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 18

The concentration of methane (CH4CH_4CH4​) in the atmosphere can be measured in parts per billion (ppb).

Table 1 shows the global average measurements of methane in July 2011 and July 2021.

Table 1

Month and YearConcentration of methane in ppb
July 20111801.34
July 20211895.78

Calculate the increase in the concentration, in ppb, of methane from July 2011 to July 2021.

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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