| A | B |
|---|
| contain | to hold something |
| transfer | to move from one place to another |
| transform | change |
| conversion | a change from one form to another |
| renew | to make new again |
| fuel | source of energy: coal, wood, gas |
| gravity | force that pulls things down to the earth |
| velocity | speed in a certain direction |
| accelerate | to go faster |
| position | the place where someone is |
| action | something that happens; motion |
| friction | a force that stops objects from moving |
| directions | the way an object moves |
| inertia | a force that keeps objects in motion |
| force | power that makes an object move |
| Isaac Newton | a scientist who studied motion |
| laws | rules |
| speed | how fast an object moves |
| motion | the act of moving |
| reaction | something that happens because of something |
