Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards
share
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

Seasons

Earth's seasons & motion

TermDefinition
sphere Any round object that has a surface that is the same distance from its center at all points
hemisphere 1/2 of a sphere or globe
equator An imaginary line around the middle of the Earth at an equal distance from the North Pole and the South Pole
axis The imaginary straight line through the Earth in which it rotates around
tilt To slant such as the Earth's slant of 23 1/2 degrees
orbit The path followed by any heavenly body as it travels around another body, such as the earth around the sun
rotate To turn around a center axis
solstice The two times of the year when the sun is farthest from the equator in the north or south
equinox The two times of the year when the sun crosses the earth's equator and day and night are of equal length
year The length of time it takes earth to revolve around the sun 365 1/4 days
day The length of time it takes the earth to rotate once on its axis 24 hours
winter solstice The shortest day of the year in which the sun is at it's southernmost point below the equator, Dec 21
summer solstice The longest day of the year when the sun is at it's northernmost point above the equator, June 21
spring equinox The day of the year when the sun is directly over the equator, also called the vernal equinox, March 21
fall equinox The day of the year when the sun is directly over the equator, also called the autumnal equinox, Sept 21
Created by: dmiles