Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Earth Science Gr7

Chapter 22

TermDefinition
spectroscope an instrument that spreads light into different wavelengths
astronomical unit the average distance from Earth to the Sun--about 150 million km
light-year the distance light travels in one year
apparent magnitude a measure of how bright an object appears from Earth
luminosity the true brightness of an object
nuclear fusion a process that occurs when the nuclei of several atoms combine into one larger nucleus
star a large sphere of hydrogen gas, held together by gravity, that is hot enough for nuclear reactions to occur in its core
radiative zone a shell of cooler hydrogen above a star's core
convection zone layer of a star where hot gas moves up toward the surface and cooler gas moves deeper into the interior
photosphere the apparent surface of a star
chromosphere the orange-red layer above the photosphere of a star
corona the wide, outermost layer of a star's atmosphere
Hertzsprung-Russel diagram a graph that plots luminosity v. temperature of stars
nebula a cloud of gas and dust
white dwarf a hot, dense, slowly cooling sphere of carbon
supernova an enormous explosion that destroys a star
neutron star a dense core of neutrons that remains after a supernova
black hole an object whose gravity is so great that no light can escape
galaxy a huge collection of stars, gas, and dust
dark matter matter that emits no light at any wavelength
Big Bang theory the scientific theory that states that the universe began from one point and has been expanding and cooling ever since
Doppler shift the shift to a different wavelength on the electromagnetic spectrum
Created by: carriel
Popular Earth Science sets

 

 



Voices

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:
Retries:
restart all cards