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Chapter 3 Science Review
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What is the measure of gravity on an object?
Weight
What is an example of velocity?
25mph.North
Name three types of acceleration.
a. Starting b. Speeding up c. Slowing down
Any change in speed or direction of an object’s motion
Acceleration
What combines both the speed and the direction an object is moving?
Velocity
To find an object’s average speed...
Divide the distance the object moves by the total time spent moving.
What is the rate at which an object changes position?
Speed
Objects move at different _______.
speeds
What changes on the moon, mass or weight?
Weight
The force of gravity increases when objects get
closer
The force of gravity increases as objects increase in
Mass
The strength of the force of gravity depends on...
the masses of the objects and how much distance is between them.
The force that pulls all objects toward each other.
Gravity
More force is needed to change the motion of an object...
with more mass
What acts in opposite directions cancel each other?
Balanced Forces
The amount of force acting on an object affects how the object changes...
speed, direction, or both
Explain why an object does not move when pulled with the same force in opposite directions?
Balanced Forces. The forces cancel each other out.
All forces have ...
size and direction
What can change both the position and the motion of an object?
Pushing or pulling
A force that must touch an object to affect it.
Contact Force
What are 4 ways a force can affect the motion of an object?
1.) Start to move 2.) Move faster 3.) Slow down or stop 4.) Change direction
Any push or pull.
Force
What makes objects move or stop?
Forces
A reference point is...
a place or object used to determine if an object is in motion.
What is like your point of view?
Frame of Reference
The change in one object’s position compared with another object’s position
Relative motion
Everyday we compare objects that change positions ...
with objects that do not (reference point)
An object that is standing still is called ____________.
Fixed Object
What is a change in the position of an object?
Motion
Objects can move in 4 ways. List the ways.
a. In a straight line b. In a curved path c. As a vibration (back and forth) d. As a rotation


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