Unit 8 Gravity

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 on by a force.

• inertia
• gravity
• movement
• motion

Newton’s law of _________ gravitation states that every object in the universe attracts every other object.

• limited
• universal
• planetary
• motion

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

• stars
• gravity
• asteroids
• friction

Gravity plays an important role in forming __________, stars, and planets.

• galaxies
• asteroids
• solar systems
• an accretion

In which direction does Earth’s gravity pull the moon?

• outward
• inward
• it does not pull the moon
• sideways

What attracts all objects toward each other?

• magnets
• attractive people
• gravity
• inertia

What is the measure of the force of gravity on an object called?

• weight
• height
• mass
• density

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

• mass
• inertia
• density
• weight

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

• length
• distances
• masses
• densities

What is the amount of matter in an object? 

• atoms
• density
• mass