Gravity and Motion

A push or a pull is called a _______

• force
• motion
• action
• reaction

This is a force that attracts all objects toward each other.

• friction
• gravity
• inertia
• unbalanced force

Gravity is different from other forces because

• the objects do not have to be in contact with each other
• the objects do not have to be the same size
• the objects do not have to be made of the same materials
• gravitational force involves friction

"Every object in the universe attracts every other object"  This is known as

• the law of universal gravitation
• Newton's law of gravity
• Newton's law of gravitational force
• the e-harmony law

The strength of the force of gravity depends upon two things:

• mass and distance
• mass and weight
• weight and distance
• gravity and force

The amount of matter in an object is called _____

• mass
• weight
• volume
• gravity

Why do you weigh more on Earth than you would on Pluto?

• Earth has more mass, therefore more gravitational pull
• Earth is closer to the Sun
• Earth contains water which increases the gravitational pull
• Earth has a denser atmosphere which pushes down on you, therefore increasing the gravitational pull

If distance increases between two objects, what happens to the force of gravity?

• it increases
• it decreases
• it stays the same

If distance decreases between two objects, what happens to the force of gravity?

• it increases
• it decreases
• it stays the same

_______ is the tendency of an object to resist a change in motion.

• weight
• gravity
• inertia
• force