Energy (Chapter 15 Phy) 1. 2. 3. 4. 5. What is energy Forms of energy Energy changes Wasted energy Fuels Energy changes Energy can change from one form to another. For example chemical energy might change to heat energy. Light energy can change to chemical energy. ... It is this chemical energy which helps the plant grow. Wasted energy 'Wasted' energy. Energy cannot be created or destroyed. It can only be transferred from one form to another or moved. Energy that is 'wasted', like the heat energy from an electric lamp, does not disappear.