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Physical Science

Fourth Grade CORE Physical Science Words

TermDefinition
velocity the speed and direction an object is moving
motion the change in position of an object
force any push or pull
reference point a place or object used to determine if an object is in motion
friction a force that acts when two objects rub together
speed the rate at which an object changes position
gravity the force that pulls all objects toward each other
lift a pushing force from below that keeps an airplane in the air
drag friction caused by the air as an object moves through it
thrust force that pushes or pulls an object forward
Created by: lynnkeller
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