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

Stars and HR Diagram

Stars and the HR Diagram

TermDefinition
star A massive, luminous sphere of burning gas that is held together by gravity.
gravity A force of attraction between objects that is due to their masses.
mass Amount of matter in an object; bigger stars will have more; smaller stars will have less.
nebula A large cloud of dust and gas in space. New stars can be born here. It is also what is left when a star dies.
main sequence star A star in the main part of its life, our sun is in this phase.
red giant A smaller main sequence star becomes this later in its life. It is now bigger, brighter, and red.
supergiant A larger main sequence star becomes this later in its life. It is now really big and really bright.
white dwarf A small, hot, dim star that is the leftover center of an old red giant star.
dim Does not give off much light. Stars at the bottom of the HR Diagram
supernova A powerful explosion that occurs when a supergiant star dies, releasing lots of dust and gas. The center of a supernova can turn into a neutron star or a black hole.
black hole An object in space whose gravity is so strong not even light can escape. Some supernovas can turn into black holes.
Where on the HR Diagram are the Blue Giants located? Top Left
Where on the HR Diagram are the Red Giants and Super-giants located? Top Right
Where on the HR Diagram are the White Dwarfs located? Bottom Left
Where on the HR Diagram are the Main Sequence stars located? Throughout the middle
What does the HR Diagram Show? The temperature and luminosity (brightness) of stars.
Where would our star the sun be located? Main Sequence
Where on the HR Diagram are hottest stars located? Left Side
Where on the HR Diagram are the coolest stars located? Right Side
Where on the HR Diagram are the brightest stars located? Top
Where on the HR Diagram are the dimmest stars located? Bottom
Which star types on the HR Diagram are the hottest stars? Blue Giants and White Dwarfs
Which star types on the HR Diagram are the coolest stars? Red Giants and orange or red Main Sequence
What is another word for luminosity? Brightness
Which star types on the HR Diagram are the brightest stars? Blue Giants and Red Giants
Which star types on the HR Diagram are the dimmest stars? White Dwarfs and Some Main Sequence Stars
Created by: jeannamartinez
Popular Physical 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