| Term | Definition |
| Energy | the ability to cause change |
| Kinetic energy | energy an object has due to its motion |
| Potential energy | energy sourced in a object due to its position |
| Thermal energy | the energy of an object that increases as temperature increases |
| Chemical energy | energy storedd in chemical bonds |
| Radiant energy | energy carried by light |
| Electrical energy | energy carried by the electric current that comes out of batteries and electrical outlets |
| Nuclear energy | energy in the nucleus of every atom |
| Law of conservation of energy | states that energy can change it's form but can never be created of formed |
| nonrenewable resource | energy source that is used up much faster than it can be replaced |
| renewable resource | energy sources that is replaced continually |
| alternative resource | new renewable or inexhaustible energy sources |
| Inexhaustible resource | energy source that cannot be used up by humans |
| Photovoltaic | device that transforms radiant energy directly into electrical energy |