Gravity and Inertia

Gravity attracts all objects towards one another.

• False
• True
• It depends

Because of inertia, a moving object will keep ________.

• at rest
• moving
• in one spot
• inertia 

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

• rest
• a constant speed
• school
• inertia 

the tendency of an object to resist a change in its motion

• acceleration
• inertia
• mass
• frame of reference

A force which tries to pull two objects towards each other is

• gravity

• inertia

• mass

• speed

Anything with ____________ also has a gravitational pull.

• mass

• size

• depth

• light

What is weight?

• how much fat is on your body

• how strong you are

• how strongly your body is being pulled down by gravity

• when you have to stand in line

Gravity is based on an object's

• mass

• size

• roundness

• brightness

Inertia tells us that we need ____________ to get an object moving or to make it stop.

• a force

• gravity

• friction

• strength

What keeps the planets in orbit around the sun?

• gravity and inertia together

• gravity

• inertia

• neither gravity or inertia