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WYLIE Science UB_2

4th grade WYLIE Science Unit B_ch 2

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