Use the drop-down menus to complete the statements. During photosynthesis, energy from sunlight is used to start a reaction with
and water.

These reactions produce
, which stores energy.
is also produced and released into the atmosphere.

During cellular respiration, oxygen is used to break down glucose molecules into carbon dioxide, water, and
.

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.