| A | B |
|---|
| energy | ability to cause changes in matter |
| kinetic energy | energy of motion, or energy in use |
| potential energy | energy an object has because of where it is or because of its condition |
| electric charge | when an object gains or loses electrons |
| electric force | attraction or repulsion of objects due to their charges |
| electric current | the flow of electrons |
| conductor | material that conducts electrons easily |
| insulator | material that doesn't carry electrons |
| resistors | materials that resist electric current |
| electromagnet | a temporary magnet made by passing electric current through a wire coiled around an iron bar |
| reflection | the light energy that bounces off objects |
| refraction | bending of light rays |
| lens | a piece of clear material that bends, or refracts, light rays passing through it |
| pitch | an element of sound determined by the speed at which sound waves move |
| volume | the loudness of a sound |
| temperature | the average kinetic energy of all the molecules in an object |
| heat | the transfer of thermal energy from one substance to another |
| conduction | direct transfer of thermal energy between objects that touch |
| convection | thermal energy transfer as a results of the mixing of a liquid or a gas. |
| radiation | transfer of thermal energy by electromagnetic waves |
