| A | B |
|---|
| energy | ability to do work |
| potential energy | stored energy |
| kinetic energy | energy of motion |
| mechanical energy | energy related to matter in motion |
| light energy | energy from the sun and part of the electromagnetic spectrum |
| chemical energy | energy in food, fuel and other compounds |
| electric energy | energy in an electric current |
| heat energy | energy resulting from the motion of particles of matter |
| nuclear energy | energy in nuclei of atoms |
| law of conservation of energy | idea stating that energy can be changed from one form to another, but the total amount of energy remains the same |
| reaction | chemical change in which substances combine and form new substances |
| exothermic reaction | chemical change during which energy is released |
| endothermic reaction | chemical change during which energy is absorbed |
