4. Stored chemical energy; sugar

The chemical energy in sugar is stored in the covalent bonds between the atoms that make up the sugar molecule. ... During cellular respiration, the glucose and oxygen gas that are made during photosynthesis are converted into water, carbon dioxide gas, and an energy source called ATP (adenosine triphosphate).

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >