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.

White dwarves, and neutron stars

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
What is a white dwarf?   A dead corpse of a low-mass star  
🗑
The most massive white dwarf is the __________.   Smallest  
🗑
What kind of pressure keeps a white dwarf from contraction by gravity?   Electron degeneracy pressure  
🗑
If a white dwarf is in a close binary, what happen?   The white dwarf gets hydrogen from its companion (a star) and develops accretion disk around it.  
🗑
What happens when a hydrogen gas falls onto a white dwarf's surface?   The white dwarf will light up as a novae.  
🗑
What is a difference between a novae and a supernovae?   A novae is much dimmer in the sky than a supernovae.  
🗑
Altough a white dwarf doesn't shine much in visible and infrared light, it shines in ________ and ________.   Ultraviolet and X-Rays light  
🗑
What happens if we bring a sample of a white dwarf to Earth?   It will sink through the surface because it is very dense.  
🗑
What is a limit to a white dwarf? (* It is also known as the Chandraesekhar limit)   1.4 Mass times the Sun  
🗑
If there is no friction, the accretion disk will ___________   Orbit indefinitely  
🗑
As the materials encircles around the white dwarf, they eventually become __________ due to higher orbital speed.   Hotter  
🗑
How does the white dwarf shine as a nova when hydrogen gas falls onto its surface?   The high temperature begins hydrogen fusion in the layer .  
🗑
When a white dwarf shines as a novae, accreted matter ____________   Blast into space  
🗑
What is a neutron star?   A dead corpse of a high-mass star; ball of neutrons that is left over from a supernova.  
🗑
What keeps a neutron star from being crushed by gravity?   Neutron degeneracy pressure  
🗑
How are neutron stars and white dwarves similar?   They are very dense and have strong gravity  
🗑
Pulsars are .....   Neutron stars  
🗑
How do pulsars come out of neutron stars?   Their fast rotation strengthens its magnetic fields and send out a beam of radiation.  
🗑
Though pulsars are neutron stars, can all neutron stars be pulsars as well?   No  
🗑
If a white dwarf spins as fast as a neutron star,   It will break apart.  
🗑
When a white dwarf approaches the Chandraesekhar limit and began fusing carbon, it will become .......   White dwarf supernova  
🗑
Although a white dwarf novae fuses hydrogen and leaves the dwarf intact, the white dwarf supernova ______________   Is a complete explosion of a white dwarf, leaving nothing there.  
🗑


   

Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
 
To hide a column, click on the column name.
 
To hide the entire table, click on the "Hide All" button.
 
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
 
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.

 
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
Created by: U0105006
Popular Science sets