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Gravity
The force that attracts all objects to each other
Inertia
The tendency of an object to resist a change in motion
Newton's Universal Law of Gravitation
All matter has gravity
Every object in the universe attracts every other object
Mass and Distance
Two factors that affect the gravitational pull between two objects.
Force
A push or pull
Mass
The amount of matter in an object
Orbit
The path of one object revolving around another
Matter
Anything that takes up space
Newton's First Law of Motion
A body in motion will stay in motion and a body at rest will stay at rest unless acted on by another force