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12 Cards in this Set
- Front
- Back
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the state in which one object’s distance from another is changing
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Motion
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- a place or object used for comparison to determine if an object is in motion
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Reference Point
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a system of measurements based on multiples of ten and on established measures of mass, length, and time
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International Sytem of Units
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- the basic SI unit of length
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Meter
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the distance an object travels per unit of time
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speed
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- the overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by total time
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average speed
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the speed of an object at one instant of time
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Instantaneous speed
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- speed in a given direction
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velocity
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the on a graph, equal to its vertical change divided by its horizontal change steepness of a line
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slope
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one of the major pieces that make up Earth’s upper layer
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plate
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the theory that pieces of Earth’s outer layer are in constant motion
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theory of plate tectonics
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the rate at which velocity changes
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acceloration
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