When a low-mass star runs out of helium to fuse into carbon, what will it do?



start fusing carbon into other elements



die and form a planetary nebula



die and go supernova



grab material from a red giant and form a nova





.


3 points



Question 6






The sun will become a red giant in a few million years after it is done fusing helium into carbon.


True


False




.


2 points



Question 7






The sun is considered a main-sequence star, because it is still fusing hydrogen into helium.


True


False




.


2 points



Question 8






Main sequence stars have decreasing brightness with temperature.


True


False




.


2 points



Question 9






An HR diagram plots a star’s luminosity and surface temperature.


True


False




.


2 points



Question 10






The graph that shows the differences in stars’ temperatures, magnitudes, and stages in life cycles is called what?



Heismann-Rudolph Diagram



Hertzprung-Russell Diagram



Einstein-Newton Diagram



Henderson-Hasselbach Diagram






been stuck on these for 2 days