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Sara's quiz
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19
Science
6th Grade
02/14/2011

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Term
acceleration
Definition
The change in velocity during a particular time period.
Term
air resistance
Definition
the friction from air molecules hitting an object as the object moves through the air.
Term
balanced forces
Definition
Equal forces acting in opposite directions.
Term
force
Definition
A push or a pull.
Term
frame of reference
Definition
The object an observer uses to detect motion.
Term
friction
Definition
A force between surfaces that resists the movement of one surface past the other surface.
Term
gravity
Definition
The force of attraction that exists between any two objects.
Term
inertia
Definition
The resistance of an object to change in its state of motion.
Term
instantaneous speed
Definition
The speed at any given point.
Term
law
Definition
A statement that describes events or relationships that exist in nature.
Term
mass
Definition
The amount of matter in an object.
Term
net force
Definition
The combination of all the forces acting on an object.
Term
newton
Definition
In the metric system, the unit used to measure force or weight.
Term
relative motion
Definition
The change in position of one object compared to the position of another.
Term
relative motion
Definition
The change in position of one object compares to the position of another.
Term
speed
Definition
The distance an object moves in a certain period of time.
Term
speedometer
Definition
A device that shows instantaneous speed.
Term
velocity
Definition
A measure of both the speed and direction of a moving object.
Term
weight
Definition
A measure of the pull of gravity on an object's mass.
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