| A | B |
|---|
| Things around you that you use to describe motion | frame of reference |
| Motion that is described based on a frame of reference | relative motion |
| Metric unit of force | newton |
| Measure of the force of gravity on an object | weight |
| Force that keeps two objects that are touching from easily sliding past each other | friction |
| Describes a certain place | position |
| Any change of position | motion |
| Measure of an object's change of position during a unit of time | speed |
| Any push or pull | force |
| Change in the speed or direction of an object's motion | acceleration |
| Force that pulls all objects toward each other | gravity |
