| A | B |
|---|
| motion | a change of position relative to a reference point |
| reference point | a place or object used for comparison to determine if something is in motion |
| International System of Units | (SI) the system of measurement based on the number 10 that scientists use to communicate information clearly |
| meter | the basic SI unit of length |
| average speed | the total distance traveled divided by the total time |
| velocity | speed in a given direction |
| plate | one of the major pieces of Earth's crust |
| acceleration | the rate at which velocity changes |
| speed | the distance an object travels in one unit of time (speed=distance divided by time) |
| graph | pictorial representation of data |
| deceleration | usually refers to when velocity slows down |
