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