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.
Don't know
remaining cards
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 22

12 vocab words

black hole An object whose gravity is so strong that nothing, not even light, can escape.
fusion Creation of energy by joining the nuclei of two hydrogen atoms to form helium.
Doppler effect An observed change in the frequency of a wave when the source or observer is moving
convection Heat transfer in a gas or liquid by the circulation of currents from one region to another
corona The outer layer of the sun's atmosphere.
light year The distance light travels in one year
nebula a large cloud of dust and gas that can break apart into smaller pieces and form stars
Main sequence the stage in which stars produce energy through the fusion of hydrogen into helium
Neutron star may occur when a supergiant collapses to a very dense core
parallex An apparent shift in the position of an object when viewed from different locations
solar wind A stream of electrically charged particles produced by the sun's corona
sunspot a cooler darker spot appearing periodically on the sun's photosphere
Created by: mrgan_greil