| A | B |
|---|
| energy | the ability to do work |
| heat | when a force causes an object to move |
| kinetic energy | the energy of motion |
| potential energy | the energy due to position |
| gravitational potential energy | energy due to position and gravity |
| waves | the way energy travels |
| sun | the source of most of Earth's energy |
| law of conservation of energy | energy is never created or destroyed |
| law of conservation of matter | matter is never created or destroyed |
| thermal energy | the energy of molecules moving |
| chemical energy | the energy stored in food, wood, oil and gas |
| light energy | travels in waves, produces different colors |
| sound energy | energy of vibration |
| energy transfer | when energy moves from one place to another |
| wax, a match, dynamite, gasoline | examples of chemical energy |
| energy used to take pictures of your bones | x-ray |
| energy that heats the oceans comes from | the sun |
| can't travel though space | sound energy |
| tiny waves used to heat food | microwaves |
| UV radiation | causes sunburns and skin cancer |
