| A | B |
| Potential energy | Stored energy |
| Light energy | Energy produced by the motion of waves of light |
| Electrical energy | Energy produced and carried by the electrons in a substance |
| Chemical energy | Energy stored in molecules |
| Condensation | The process by which gas turns into a liquid |
| Nuclear fission | The splitting of atomic nuclei, resulting in great energy release |
| Mechanical energy | Energy produced by the moving parts of a machine |
| Heat energy | Energy produced by the motion of molecules |
| Kinetic energy | Energy in movment |
| Nuclear Fusion | The joining of atomic nuclei, resulting in great energy release |
| Energy | The ability to do work |
| Nuclear energy | Energy stored in the nucleus of an atom |
| Conduction | The transfer of heat from one object to another |