| A | B |
|---|
| motion | object's change in position over time when compared with a reference point |
| reference point | an object that appears to stay in place in relation to an object being observed for motion |
| speed | the rate at which an object moves; speed depends on the distance traveled and the time taken to travel that distance |
| slope | the ratio of the change in the y-axis to the change in the x-axis, or "rise over run" |
| velocity | The speed of an object in a particular direction (always include a reference direction) |
| average speed | the overall rate at which an object moves (average speed = distance/time |
| constant speed | maintaining the same rate of movement |
| rate | ratio of distance over time |
| time-distance graph | a line graph that shows speed |
