Stars_HR Diagram

Which of the stars is oldest in terms of the life cycle?

• a)

• b)

• c)

• d)

• e)

Which of the stars is (are) burning hydrogen as fuel? (identify all)

• a)

• b)

• c)

• d)

• e)

Which of the stars is (are) burning Helium as fuel?

• a)

• b)

• c)

• d)

• e)

Which of the stars is closest to death?

• a)

• b)

• c)

• d)

• e)

Which of the stars has the highest luminosity?

• a)

• b)

• c)

• d)

• e)

What causes the star with the highest luminosity to be the brightest?

• a) surface temperature

• b) size

Which of the stars has the lowest luminosity?

• a)

• b)

• c)

• d)

• e)

The star with the lowest luminosity is dimmest because of size or surface temperature?

• a) surface temperature

• b) size

Which has the highest surface temperature?

• a)

• b)

• c)

• d)

• e)

Main Sequence stars will become Red Giants when they run out of which fuel?

• a) helium

• b) carbon

• c) hydrogen