STARS
What is a ball of gas held together by gravity called?
A Star.
What is on the x-axis of the H-R diagram? What unit is it in?
Temperature (Kelvin)
A cloud of gas and dust is called what? (First stage of the life cycle)
Stellar Nebula
Name the 3 types of galaxies
elliptical, spiral, irregular.
What is hotter a red giant star or a white dwarf star?
White dwarf.
What color is a cool star?
red.
What is on the y-axis of the H-R diagram? What unit is it in?
Luminosity (1=sun)
How many different paths are there in a stars life cycle?
2 path ways
The Milky Way Galaxy
What does irregular galaxy mean?
What is the name of the closest star to earth?
The Sun.
Where on the H-R diagram would be find a super giant like Betelgeuse?
What determines what path a stars life cycle will go?
mass
What type of galaxy is made up of older stars that are clumped together?
elliptical
list the color of stars from hot to cool
blue, white, yellow, red
What does it mean if you the star is the "most luminous"
It is the brightest.
If I had a cool dim star where would I find it on the H-R diagram? What kind of star would this be classified?
In the bottom right corner.
Main sequence.
Name 3 possible final stages of a stars life cycle. List in order from largest to smallest in size.
Black hole, neutron star, white dwarf.
What kinds of stars make up the bulge of the spiral galaxy?
Old stars
What are the two types of elements that fuel nuclear fusion on the sun?
hydrogen and helium.
When a giant star explodes, what is formed? (2 options) How would you get each of them?
more mass left behind - black hole
less mass left behind - neutron star
What is unique about the x-axis the H-R diagram?
The values decrease instead of increasing like a typical graph would.
Write out the path of a star's life cycle. (either one is fine, must include 5 names)
Stellar nebula, main sequence, red giant, planetary nebula, white dwarf.
Stellar nebula, main sequence, super giant, super nova, black hole/neutron star
What can be found in the center of most spiral shaped galaxies
a super massive black hole.
What is nuclear fusion
When the the nucleus of 2 atoms fuse together.