Carbon cycle: past paper questions
Real questions on carbon cycle
The newest 14 of 14 written questions. Open one to see it on the real paper.
- 0973/42 · May/June 2026 · Q3c(ii)[3]
Bacteria are important in the carbon cycle. Figure 3.1 shows a simplified carbon cycle. carbon dioxide in the atmosphere carbon in producers carbon in consumers \ carbon in fossil fuel ——_§_—_ carbon in dead organisms Figure 3.1 Bacteria are involved in process A. State the name of process A and explain why process A i...
See it on the paper → - 0973/41 · October/November 2025 · Q3b(i)[2]
Explain how deforestation can increase the concentration of carbon dioxide in the atmosphere.
See it on the paper → - 0973/32 · May/June 2024 · Q10a[3]
Identify the processes occurring at X, Y and Z in Fig. 10.1. X Y Z
See it on the paper → - 0973/32 · May/June 2024 · Q10b[2]
The concentration of carbon dioxide in the atmosphere is increasing. Use Fig. 10.1 to state two ways humans could increase the removal of carbon dioxide from the atmosphere.
See it on the paper → - 0973/31 · May/June 2023 · Q11b(i)[1]
This soil treatment adds carbon dioxide to the atmosphere. State one other reason why the amount of carbon dioxide in the atmosphere is increasing.
See it on the paper → - 0973/31 · May/June 2023 · Q11b(ii)[1]
Describe how an increase in carbon dioxide in the atmosphere affects the environment.
See it on the paper → - 0973/42 · May/June 2022 · Q4a(i)[1]
Identify process E in Fig. 4.1.
See it on the paper → - 0973/42 · May/June 2022 · Q4a(ii)[1]
Draw one arrow on Fig. 4.1 to represent the process of feeding.
See it on the paper → - 0973/42 · May/June 2022 · Q4a(iv)[2]
Name process D in Fig. 4.1 and describe its effect on the atmosphere. name effect on atmosphere
See it on the paper → - 0973/31 · October/November 2021 · Q10a[1]
Name the process occurring at X in Fig. 10.1.
See it on the paper → - 0973/31 · October/November 2021 · Q10b(ii)[2]
Stopping deforestation will reduce the build-up of carbon dioxide in the atmosphere. Use the information in Fig. 10.1 to suggest two other ways we can reduce the build-up of carbon dioxide in the atmosphere.
See it on the paper → - 0973/41 · October/November 2020 · Q5c[2]
State two other processes that produce carbon dioxide.
See it on the paper → - 0973/42 · May/June 2020 · Q8c[1]
Ethene burns in oxygen to form carbon dioxide. Carbon dioxide is a greenhouse gas. State an effect of increased concentrations of greenhouse gases in the atmosphere.
See it on the paper → - 0973/41 · May/June 2019 · Q4b[3]
Describe how slash-and-burn agriculture can increase the carbon dioxide concentration in the atmosphere.
See it on the paper →
What examiners said
Deforestation and burning carbon-containing fuels in cars were common correct responses.
— Examiner report, May/June 2023, 0973/31 Q11(b)(i) (Cambridge)
Few candidates suggested climate change or global warming as consequences of an increase in carbon dioxide in the atmosphere. Many candidates incorrectly referred to ozone depletion.
— Examiner report, May/June 2023, 0973/31 Q11(b)(ii) (Cambridge)
Respiration, or a process involving respiration, was often correctly suggested as a process producing carbon dioxide. Where combustion was suggested, reference had to be made to a carbon containing substance or a named example.
— Examiner report, October/November 2020, 0973/41 Q5(c) (Cambridge)
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