Gravity and Motion

Newton's first law of ______________ says that an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by another force

• inertia
• gravity
• matter
• mass

Inertia and _________ combine to keep Earth in orbit around the sun and the moon in orbit around the Earth

• mass
• gravity
• weight
• matter

Newton's law of ___________ gravitation states that every object in the universe attracts every other object.

• gravity
• the solar system
• universal
• astronaut

Gravity decreases to __________ of its original value if the distance between two objects doubles.

• one-half (1/2)
• twice
• double
• one fourth (1/4)

Earth's gravity pulls the moon ______________

• outward
• inward
• toward the sun
• around Jupiter

The amount of matter in an object is its _________.

• mass
• weight
• gravitational pull
• inertia

__________ attracts all objects toward each other.

• inertia
• weight
• gravity
• solar system

An object with greater _______________ is more difficult to stop or start.

• mass
• gravity
• inertia
• distance

The __________ of two objects and their distance from each other determine the gravitational force between them.

• mass
• size
• force
• inertia

The measure of force on an object is its ___________.

• satellite
• mass
• gravity
• weight