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IB Biology SL C4.2.18 Carbon Sinks and Sources Questions

Classify forests, soils, oceans, peat and combustion as carbon sinks or sources, then interpret carbon-budget changes in IB Biology SL C4.2.18.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify carbon sinks and sources by deciding whether a reservoir or process absorbs and stores more carbon than it releases, or releases more than it absorbs.
  • Interpret carbon-budget or ecosystem data to explain how forests, soils, oceans, peat and fossil-fuel combustion change atmospheric carbon storage.

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Study C4.2.18—Carbon sinks and sources conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL C4.2.18 Carbon Sinks and Sources Questions question 1

[Maximum number: 1]

Carbon sinks are any reservoirs that absorb and store carbon dioxide from the atmosphere. Which process increases the size of the carbon sink in oceans?

A

Photosynthesis

B

Respiration

C

Ocean acidification

D

Decomposition

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