7.2.6 Chemical Reactions in Organisms

the process cells use to gain energy from sugar

a molecule that plants build and organisms use for energy

the process producers use to capture energy from light

A chemical change occurs during photosynthesis.

The balanced chemical equation for photosynthesis shows that the same number of carbon, hydrogen, and oxygen atoms are present in both the reactants and products.

During a chemical change, the atoms of the reactants are rearranged to form new substances in the products. The balanced equation shows that the same atoms form new substances.