Essential Chemistry for IGCSE - Air And Water (Section 2 - No. 9)
Which statement about the carbon cycle is correct?
The carbon cycle keeps the concentration of carbon dioxide in the atmosphere approximately constant.
The amount of carbon dioxide produced in respiration is not balanced by what is absorbed in photosynthesis.
Burning fossil fuels and deforestation do not impact the carbon cycle.
The uptake of carbon dioxide from the atmosphere into the oceans is not roughly balanced by the carbon dioxide released back to the atmosphere from the oceans.
Explanation
The carbon cycle maintains a near-constant level of carbon dioxide in the atmosphere through balanced processes.
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