Discuss each question with your team. Be prepared to explain the reasoning behind your team's answers after the quiz.

1. Which star is hottest?
   • An F8 horizontal branch giant
   • An F3 main sequence star
   • A K2 supergiant
   • A G5 main sequence star
2. There are two G2 V stars. One is 9 times as bright as the other. What’s the distance to the dimmer star with respect to the brighter star?
   • 3 times closer
   • 9 times closer
   • 3 times further away
   • 9 times further away
3. What does a color index of B-V = -0.11 mean for a star?
   • The star is more blue than red, so it is a hot star
   • The star is more blue than red, so it is a cool star
   • The star is more red than blue, so it is a hot star
   • The star is more red than blue, so it is a cool star
4. When a main sequence star becomes a red giant, it _________
   • increases in temperature and luminosity.
   • decreases in temperature and luminosity.
   • increases in temperature and decreases in luminosity.
   • decreases in temperature and increases in luminosity.