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Causes of climate change

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Question 8

Choose the correct statement from A, B, C, D to complete the following sentence:

The ocean carbon-sink feedback loop accelerates global temperature rise because...

A

warming surface waters increase the density of the upper ocean, accelerating the thermohaline circulation and the downwelling of dissolved carbon.

B

increased atmospheric CO2\text{CO}_2CO2​ acidifies the ocean, which stimulates the rapid calcification of marine organisms, causing them to store more carbon.

C

warmer ocean waters have a lower solubility for carbon dioxide, reducing the ocean's capacity to absorb CO2\text{CO}_2CO2​ from the atmosphere and accelerating the greenhouse effect.

D

increased ocean evaporation removes massive volumes of dissolved CO2\text{CO}_2CO2​ from the water column, converting it permanently into atmospheric oxygen.

Markscheme

Causes of climate change Questions

  1. GCSE
  2. /Geography
  3. /Causes of climate change

18 exam-style questions on OCR A GCSE Geography Causes of climate change. Each one has a worked solution and a mark scheme showing where the marks go.

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