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IB Biology SL C4.2.18 Carbon Sinks and Sources Questions

Carbon sinks absorb more carbon than they release; forests, soils and oceans are examples. Carbon sources release more than they absorb, such as fossil-fuel combustion.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify a carbon sink by net carbon storage and distinguish it from a source that releases more carbon than it absorbs.
  • Use forests and oceans as sink examples and fossil-fuel combustion as a source based on net carbon transfer.

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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