Big Idea 13 Forces and Changes in Motion

What force pulls objects to the center of Earth?

• motion

• balanced force

• magnetism

• gravity

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A magnet will attract which of the following objects?

• rubber

• metal

• plastic

• paper

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What force resists motion and produces heat?

• friction

• pull

• push

• gravity

Which means a change in position?

• force

• velocity

• motion

• speed

When an object is in motion, its ______ is changing.

• frame of reference

• position

• weight

• mass

Which measures a change in position over a period of time?

• periodic motion

• speed

• friction

• forces

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How can you tell if a car is moving?

• The car is changing its position.

• The car has wheels.

• The car is in the driveway.

• The car has a motor.

Which of the following can be used to measure an object's motion?

• The object's speed

• all of these

• the distance the object traveled

• the time the object has been traveling

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Which of the following forces can both attract and repel some objects without touching them?

• spring scale

• friction

• magnetism

• gravity

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What is a balanced force?

• when no force is being applied

• when the object changes its position

• when one side has a larger amount of force being applied

• when the same amount of force is being applied to opposing sides

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