| A | B |
|---|
| automatically | movement that starts and continues, or stops on its own |
| balanced forces | forces that are equal and do not cause movement |
| buoyancy | upward pushing force of water and other liquids on objects |
| chemical energy | energy from food or fuel |
| direct force | a force that touches an object directly |
| direction | which way an object is moving |
| energy | forces depend on energy, which makes things go and makes things happen |
| force | a push or a pull |
| friction | the rubbing and pushing of two objects against each other |
| gravity | the pull of objects toward a planet |
