| A | B |
| potential energy | stored energy |
| kinetic energy | energy in the form of motion |
| work | transfer of energy through motion |
| energy | the ability to cause change |
| mechanical energy | total amount of kinetic and potential energy in a system |
| law of conservation of energy | energy may change from one form to another, but it canot be created or destroyed under ordinary conditions |
| a moving skateboard | KE |
| a rock at the edge of a cliff | PE |
| a glass of milk | PE |
| gasoline | PE |
| a basketball passing through the hoop | KE |
| a dry cell of a battery | PE |
| an acorn hanging from an oak tree | PE |
| a person climbing a ladder | KE |
| a piece of celery | PE |
| blowing wind | KE |