| A | B |
| Potential Energy(PE) | Energy of position |
| Kinetic Energy(KE) | Energy of motion |
| Gravitational PE | The type of energy an object above the Earth's surface has |
| Joule | The SI unit for energy |
| Elastic energy | A type of PE that is stored in an object that is compressed or can be stretched |
| Chemical energy | A type of PE that is stored in chemical bonds |
| Mechanical energy | The sum of PE + KE in a system |
| Law of conservation of energy | Total amount of energy in the universe remains the same. |
| Nuclear fission | Nuclei are broken apart |
| Nuclear fusion | Nuclei are combined |