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Science Final
Ch. 13 Vocabulary
7
Science
8th Grade
05/05/2009

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Term
gravity
Definition
a force of attraction between objects that is due to their masses
Term
weight
Definition
a measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe
Term
mass
Definition
a measure of the amount of matter in an object
Term
terminal velocity
Definition
the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
Term
free fall
Definition
the motion of a body when only the force of gravity is acting on the body
Term
projectile motion
Definition
the curved path that an object follows when thrown, launched, or otherwise projected near the surface of the earth
Term
inertia
Definition
the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object
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