Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Your email address is only used to allow you to reset your password. See 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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (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



Rotation turning on an axis
Revolution something goes around something else
Orbit when something spins around
Geocentric Theory Earth is the center of the universe
Heliocentric Theory The Sun was the center of the solar system
Astronomy the science of observing the sky
Solar System the sun, its planets, and all other objects in orbit around the sun or planets
Telescope a device built to observe distant objects, like stars, by making them appear closer
Comet a loose collection of ice, dust, and small rocky particles with a long, narrow orbit of the sun
Gravity the force that pulls objects toward each other
Astronomer a scientist who universe beyond Earth
NASA National Aeronautic and Space Administration
Axis what supports the earth
Tilt causes the lengths of days and nights of the year
Meteors a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
Constellation patterns in the stars' positions
Vernal Equinox begins on March 21
Autumnal Equinox begins on September 22
Summer Solstice begins on June 21
Winter Solstice begins on December 21
Created by: 1964362684
Popular Earth Science sets




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

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

If you've accidentally put the card in the wrong box, just click 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