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 (0)
Remaining cards (0)
Know (0)
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


Movements in the System

Rotation Movement of an object on its axis
Revolution Movement of an object around another object
Orbit Path an object takes around another object
Gravitational Force Force of attraction between objects of mass; larger mass = more gravitational pull
Season Yearly changes on Earth due to its axial tilt and revolution
Lunar Cycle Repeated sequence of the moon revolving around Earth
Axis The imaginary line that goes through the poles of any object
Moon Phase Changes in the appearance of the Moon as it revolves around Earth
About 24 hours The time it takes Earth to complete one full rotation
About 365 days The time it takes Earth to complete one full revolution
About 29 1/2 days The time it takes the Moon to complete one full revolution (and rotation)
23 1/2 degrees The tilt of Earth on its axis
Spring, Summer, Fall, Wintert The pattern of seasonal changes from some places on Earth
Counterclockwise The direction Earth rotates and revolves
New, First Quarter, Full, Last Quarter, New Moon The cycle of phases for a lunar cycle
Created by: EThames20


Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then tap the card to flip it. If you knew the answer, tap the green Know box. Otherwise, tap the red Don't know box.

When you've placed seven or more cards in the Don't know box, tap "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards