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9.2 Earth and atmospheric science

9.2 Earth and atmospheric science

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Question 16

The concentration of nitrous oxide (N2ON_2ON2​O) in the atmosphere can be measured in parts per billion (ppb).

Table 1 shows the global average measurements of nitrous oxide in July 2015 and July 2020.

Table 1

Month and YearConcentration of nitrous oxide in ppb
July 2015328.23
July 2020333.15

Calculate the increase in the concentration, in ppb, of nitrous oxide from July 2015 to July 2020.

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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