Oxford AQA International A-level · Geography (9635)

Water and carbon cycles as natural systems: Practice Questions

4 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Water and carbon cycles as natural systems.

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Question 1

1 mark

In the context of Water and carbon cycles as natural systems, which of the following best describes the concept of dynamic equilibrium in a drainage basin?

Question 2

1 mark

In the context of the global carbon cycle, how does the process of carbon sequestration in the oceans primarily function as a long-term store?

Question 3

1 mark

Evaluate the impact of deforestation on the water balance of a tropical rainforest drainage basin. Which of the following best describes the resulting shift in the water balance equation (\(P = Q + E \pm \Delta S\))?

Question 4

1 mark

When analyzing a flood hydrograph for a drainage basin that has undergone extensive urbanization, which change is most characteristic compared to its rural state?

Question 5

5 marks

Analyze the carbon budget of a tropical peatland; how does the disruption of photosynthesis and decomposition rates due to anthropogenic drainage lead to a shift from a carbon sink to a carbon source?

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Question 6

6 marks

Evaluate how dynamic equilibrium in a forest ecosystem is disrupted by human-induced combustion and land use change, specifically referring to the resulting shifts in the carbon budget between the biosphere and the atmosphere.

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Question 7

7 marks

Water and carbon cycles as natural systems

The magnitude of water and carbon stores varies significantly across different scales.

(a) Compare the residence times of water in the cryosphere and the atmosphere, explaining how these differences influence the global water cycle. (3)

(b) Explain how the process of carbon sequestration in the oceans acts as a long-term store in the carbon cycle and the potential impact of rising ocean temperatures on this process. (4)

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