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