The document discusses three main types of energy: potential energy, kinetic energy, and chemical energy. It provides examples of each type. Potential energy is stored energy that an object has due to its position or state. Kinetic energy is the energy of motion that an object has due to its movement. Chemical energy is stored in the bonds of compounds and released through chemical reactions like combustion and digestion. The energy stored in food is converted to chemical energy when organisms digest and use food.