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science chapter 9
motion
Question | Answer |
---|---|
motion | the state in which one object's distance from another is changing |
reference point | a place or object used for comparison to determine if an object is in motion |
international system of units | the system of units used by scientists to measure the properties of matter |
meter | the basic SI unit of length |
speed | the distance an object travels per unit of time |
average speed | the overall rate of speed at which an object moves |
instantaneous speed | the speed of an object at one distant of time |
velocity | speed in a given direction |
slope | the steepness of a line on a graph, equal to its vertical change divided by its horizontal change |
acceleration | the rate at which velocity changes |