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science
ch 5 section 1
| Word | Deff. |
|---|---|
| motion | when an object changes pattern over time relative to a reference point |
| speed | the distance traveled by an object divided by the time taken to travel that distance. |
| velocity | the speed of an object in a particular direction. |
| acceleration | the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change. |