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.
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

Course 3 Topic 9

Lesson 3: Phases and Eclipses

Phases The different shapes of the moon.
New moon When the moon is between Earth and the sun.
Waxing crescent Moon is getting bigger, more light.
First quarter When the moon is half lit and half dark, we only see the right half.
Waxing gibbous We see about 3/4 of the moon. The right sdie is lit. Moon is getting bigger, more light.
Full moon When we see the full sunlit side of the moon.
Waning gibbous We see about 3/4 of the moon. The left side is lit. Moon is getting smaller, less light.
Last/Third quarter Sun is shining on the opposite side of the first quarter moon. Left half is lit.
Waning crescent We only see a small crescent moon; most of the lit part is facing away from Earth. Getting smaller, less light.
Eclipse The partial or total blocking of one object in space by another.
Umbra The darkest part of a shadow.
Penumbra The part of a shadow surrounding the darkest part.
Tide The periodic rise and fall of the level of water in the ocean.
Spring tide The tide with the GREATEST difference between consecutive low and high tides.
Neap tide The tide with the LEAST difference between consecutive low and high tides.
rotate The spinning motion of a planet on its axis.
revolve The movement of an object around another object.
Created by: KHow424



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