| A | B |
| m/s | unit for speed |
| gravity | force the pulls objects toward eachother |
| mass | as this increases, inertia increases |
| motion | the state at which an object's distance from position is changing |
| seconds | unit for time |
| meters | unit for distance |
| frame of reference | point from which movement is determined |
| distance | measurement from one point to the next |
| distance | scientific unit is meters |
| displacement | distance and direction of object's change in position |
| speed | distance divided by time |
| speed | units are m/s or km/hr |
| constant speed | speed doesn't change |
| changing speed | result of speeding up or slowing down |
| average speed | total distance traveled divided by total time of travel |
| instantaneous speed | result of speedometer reading |
| velocity | speed in a definite direction |