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

Unit 7:S and S

Eighth Grade Science

TermDefinition
Equinox Daytime hours are equal to nighttime hours. March 21 is the vernal equinox, and September 21 is the autumnal equinox
Solstice December 21 (Winter) is the shortest day of the year, and June 21 (Summer) is the longest day of the year
Nuclear Fusion How a star makes enormous amounts of energy
Nebula A large cloud of gas and dust that spread out in an immense volume
Protostar A contracting cloud of gas and dust with enough mass to form a star
Axial Tilt 45 degree angle, that is the reason for our seasons
Brightness The amount of light energy falling on a surface. As distance increases, this decreases
Luminosity A total amount of light given off in all directions. Distance affects brightness, but not this
Main Sequence The stage of life that our Sun is currently in
Red Giant When a main sequence star starts to run out of fuel, it becomes this. Someday, our Sun will become this
White Dwarf A dying red giant becomes this. Someday, our Sun will become this
Created by: FutureFarmer