Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

Chapter 11 Vocab

The Sun- Earth- Moon System Vocabulary

Sphere A round three dimensional object who's surface is the same distance from the center at all points.
Axis An imaginary line around which earth spins.
Rotation The spinning if earth on its axis, which causes day and night to occur.
Revolution Earths yearly orbit around the sun.
Ellipse Elongates, closed curve that describes earths year long orbit around the sun.
Solstice An astronomical event that occurs twice each year as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere.
Equinox The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about September 22 and March 20).
Moon Phase The different forms the moon takes in its appearance from earth.
New Moon The phase of the moon when it is in conjunction with the sun and invisible from earth, or shortly thereafter when it appears as a slender crescent.
Waxing When the illuminated part of the moon is growing.
Full Moon The phase of the moon in which its whole disk is illuminated.
Waning When the illuminated section of the moon is decreasing in size.
Created by: GageBro