| A | B |
| source of energy | the place where energy comes from |
| energy | the ability to work |
| solar energy | energy from the sun |
| mechanical energy | the energy of motion |
| thermal energy | heat energy that causes a change in temperature between materials |
| electrical energy | energy made by electric charges |
| chemical energy | energy stored in chemical bonds |
| light energy | energy that can be seen by the eye and stored for use |
| sound energy | energy produced from vibration that you can hear |