Which force keeps the earth in its place in the solar system?

• Friction

• Magnetism

• Push

• Gravity

Gravity is a force which pulls things down to earth. What is true about the force of gravity on the moon compared to earth?

• It is stronger.

• It is weaker.

• It is the same.

• There is no gravity on the moon.

Gravitational forces are always

• Attractive

• Pushing

• repulsive

• objects

The matter in an object, which affects gravitational forces

• Gravitational force

• Force

• Mass

• Weight

Why do the planets and other celestial objects in our solar system revolve around the Sun?

• The Sun has the greatest mass of any object in the solar system and therefore the greatest gravity

• The sun is the center of the universe

• The sun is the brightest thing in space and everything is attracted to it.

• The Sun has the greatest weight so everything pushes towards it

The gravitational force between two objects can be very small, unless which of the following is true?

• The objects must be very far apart.

• One of the objects must have a very large mass.

• Both objects must have very large masses.

• Both objects must be in the solid state of matter.

Which piece of evidence best supports this statement: Gravity is felt between objects across a distance.

• Heavier objects have less gravity acting on them.

• An object at rest on the ground doesn’t respond to gravity.

• The Moon orbits Earth due to a gravitational field.

• Objects float freely in space where there is no gravity.

Why do some planets have moons in our solar system?

• They are close to the sun

• They have enough gravity to hold a moon in orbit

• They are special

• All planets have moons

What force played a major role in the formation of the solar system?

• Magnetism

• Push

• Pull

• Gravity

Which of the following has the

strongest gravitational pull?

• Earth

• Sun

• Moon

• Mars