| A | B |
|---|
| potential energy | stored energy an object has because of its position |
| kinetic energy | the energy of motion |
| mechanical energy | energy that can move objects |
| electric energy | energy carried by electricity |
| radiant energy | energy that can flow through empty space |
| chemical energy | energy released by chemical changes |
| nuclear energy | energy released when nuclei of atoms split of join |
| dry cell | a battery that changes chemical energy to electric energy in a nonliquid material |
| wet cell | a battery that changes chemical energy to electric energy in a liquid |
| generator | a device that uses a magnet to change mechanical energy into electricity |
| power | energy divided by time |
| watt | a unit for measuring power |
| kilowatt-hour | 1,000 watts used over a period of one hour |
| fuse | a safety device that melts and opens a circuit when too much current is flowing |
| circuit breaker | a safety device that switches off and opens a circuit when too much current is flowing |
| force | anything that changes the speed or direction of an object |
| newton | the unit for measuring force |
| joule | a unit for measuring work and energy |
