Syllabus Edition

First teaching 2024

First exams 2026

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Biogeochemical Cycles (DP IB Environmental Systems & Societies (ESS): SL): Exam Questions

33 mins10 questions
12 marks

State two storages in the carbon cycle.

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22 marks

State two flows in the carbon cycle.

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31 mark

Define the term biogeochemical cycle.

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41 mark

Identify one organic store of carbon.

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51 mark

Outline one way carbon can move between stores in an ecosystem.

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61 mark

Outline one way human activities impact the carbon cycle.

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1a2 marks

Part of the carbon cycle is shown in the diagram below.

screenshot-2023-07-26-at-10-21-43

Identify processes X and Y in the diagram.

1b3 marks

Describe how carbon is released during process Y.

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2a2 marks

Carbon from fossil fuels enters the atmosphere during combustion.

Explain how this process contributes to rising average global temperatures.

2b2 marks

Cutting down trees during deforestation increases the problem described in part a.

Explain how.

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17 marks

Explain how different components of the carbon cycle act as stores, sinks or sources.

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29 marks

Discuss how managing carbon stores and sinks contributes to climate change mitigation.

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