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4th grade WYLIE Science Unit B_ch 2

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
force   a push or a pull on an object that can cause it to change motion  
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gravity   a force that pulls any two objects toward one another, such as you toward the center of the earth  
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inertia   the tendency of a moving object to stay in motion or a resting object to stay at rest  
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friction   a force that slows the motion of moving objects  
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energy   the ability to do work  
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potential energy   energy that an objects has because of position  
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kinetic energy   energy of motion  
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mechanical energy   the kind of energy an object has because it can move or because it is moving  
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chemical energy   energy that comes from chemical changes  
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electrical energy   energy that comes from the flow of electricity  
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work   the result of a force moving an object  
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simple machine   a machine made of one or two parts  
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compound machine   a machine made of two or mote simple machines  
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complex machines   a machine made of many simple and compound machines  
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Created by: Wylie
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