AIMS Science Practice Test

What are the reactants of photosynthesis?

Carbon dioxide and water Oxygen and glucose Carbon monoxide and water Nitrogen and water

Correct Answer:

Carbon dioxide and water

Explanation:

Photosynthesis uses carbon dioxide from the air and water from the soil as the starting materials that plants convert into sugar and oxygen using light energy. In this process, carbon dioxide and water are the reactants, and oxygen and glucose are the products. The idea is that the plant takes in CO2 and H2O, powered by light, to build sugars for energy and growth, releasing oxygen in the process. The other options mix up substances that are produced (oxygen and glucose) or aren’t part of this reaction (carbon monoxide or nitrogen).

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