Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Gravity and Motion

Chapter 1 Astronomy- gravity and Motion

force A push or pull exerted on an object
gravity The attractive force between objects; its strength depends on their masses and the distance between them
Laws of universal gravitation The scientific law that states that every object in the universe attracts every other object
mass The amount of matter in an object
weight The force of gravity on an object
inertia The tendency of an object to resist a change in motion
Newton's first law of motion The scientific law that states an object at rest will stay at rest, an object in motion will stay in motion, in a straight line, unless acted upon by an outside force.
orbital motion Newton concluded that both gravity and inertia combine to keep the Earth in orbit around the sun, and the moon in orbit around the Earth.
Created by: hallet