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Force and Motion Week 4

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
friction:   A force that opposes the motion of a body across a surface or through a gas or liquid.  
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gravity:   A force that exists between any two objects that have mass.  
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speed:   Distance traveled per unit of time.  
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velocity:   The speed and direction of moving objects.  
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acceleration:   A change in the velocity (speed, direction, or both) of a body.  
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deceleration:   slowing down  
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Scale:   description of the relative size or amount of 2 or more things; a device used for measuring weight  
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Resist:   to push or act against  
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Kilogram:   metric unit for describing mass  
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Attract:   to pull towards  
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