| A | B |
|---|
| energy | the ability to do work |
| stored energy | energy that can change into a form that can do work |
| motion energy | the energy moving objects have |
| insulator | a material through which energy cannot flow easily |
| conductor | a materail through which energy flows easily |
| fuel | a material that is burned to produce useful heat |
| ray | a thin line of light |
| reflect | to bounce back |
| temperature | a measure of how hot a place or object is (in degrees) |
| lens | a piece of material that bends light rays that pass through it |
| electric charge | tiny amounts of electricity present in all matter |
| electric current | the flow of electric charges |
| electromagnet | a metal that becomes a magnet when electricity passes through wire wrapped around it |
| electric circuit | the path along which electric current moves |
