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