Astronomy Quiz 1 Review

What two variables determine the gravity of an object?

• Weight

• Mass

• Inertia

• Distance

Which statement about gravity is true?

• gravity causes objects to pull towards one another

• gravity causes objects to push away from each other

• gravity only takes place between planets

• the moon doesn't have any gravity

The amount of matter in an object.

• force 
• mass
• weight 
• pressure 

As distance increases, gravitational forces:

• Decrease

• increase

• Disappear

• Stay the same

How long does it take the Earth to make one REVOLUTION around the Sun?

• 12 hours
• 24 hours
• 365 days
• 29.5 days

Which image has the greater gravitational pull between the two objects?

• Image 1

• Image 2

• There is no difference in the gravitational pull in image 1 and 2

Which factors, when combined allow objects to stay in orbit?

• Weight

• Gravity

• Inertia

• Mass

As mass increases, gravitational forces:

• Increase

• decrease

• stay the same

• disappear

Because of inertia, a resting object will remain at ________.

• rest

• a constant speed

• moving

• inertia

Gravity is ____________

• The tendency of an object to resist a change in motion

• A force that pulls objects towards each other

• The amount of matter inside of an object

• How compact the matter inside an object is