1
Q
What happens when a main sequence star runs out of hydrogen
A
It becomes a red giant
2
Q
Mass____ as stars go through their lives
A
Decrease due to strong winds blowing mass of the star away
3
Q
The luminosity of a star ____ as it evolves on the main sequence
A
Increases
4
Q
What energy sources power a star along the red giant branch
A
Gravitational contraction, hydrogen shell fusion
Astronomy
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