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9.2 Carbon dioxide and methane as greenhouse gases

9.2 Carbon dioxide and methane as greenhouse gases

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Question 11

An Earth-sized exoplanet, TOI-700 d, is found to have an atmosphere containing methane, CH4\text{CH}_4CH4​, and trace amounts of propene, C3H6\text{C}_3\text{H}_6C3​H6​.

a.

Explain how methane acts as a greenhouse gas to keep the surface of TOI-700 d warmer than it would be without an atmosphere. You must refer to radiation wavelength in your answer.

[3]
b.

Explain how an astrochemical probe landing on the surface could chemically demonstrate that the trace propene is an unsaturated hydrocarbon. Describe the test and the positive result.

[2]
Markscheme

9.2 Carbon dioxide and methane as greenhouse gases Questions

  1. GCSE
  2. /Chemistry
  3. /9.2 Carbon dioxide and methane as greenhouse gases

13 exam-style questions on AQA GCSE Chemistry 9.2 Carbon dioxide and methane as greenhouse gases, covering 9.2.1 Greenhouse gases, 9.2.2 Human activities which contribute to an increase in greenhouse gases in the atmosphere, 9.2.3 Global climate change, and 9.2.4 The carbon footprint and its reduction. Each one has a worked solution and a mark scheme showing where the marks go.

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