Which process in the carbon cycle converts CO2 into organic matter?

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Study for the Grade 9 Environmental Chemistry Test. Use a blend of multiple-choice questions and detailed explanations. Master key concepts and prepare effectively!

Multiple Choice

Which process in the carbon cycle converts CO2 into organic matter?

Explanation:
Photosynthesis is the process that converts CO2 into organic matter. In photosynthesis, plants use CO2 along with water and sunlight to synthesize sugars, building the biomass that stores carbon as organic molecules. This step fixes inorganic carbon from the atmosphere into living tissue, which is why it creates organic matter. The other processes either release CO2 back into the air or involve burning carbon-containing material rather than building new organic carbon. For example, respiration and decomposition return CO2 to the atmosphere, and combustion releases CO2 by burning fuels.

Photosynthesis is the process that converts CO2 into organic matter. In photosynthesis, plants use CO2 along with water and sunlight to synthesize sugars, building the biomass that stores carbon as organic molecules. This step fixes inorganic carbon from the atmosphere into living tissue, which is why it creates organic matter. The other processes either release CO2 back into the air or involve burning carbon-containing material rather than building new organic carbon. For example, respiration and decomposition return CO2 to the atmosphere, and combustion releases CO2 by burning fuels.

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