H-R Diagram and star life cycle

Which group of stars is the brightest but not neccessarily the hottest?

• supergiants

• white dwarfs

• main sequence

Which star on the diagram would be the most reddish in color?

• Rigel

• Betelgeuse

• Sirius A

• Sirius B

To which group do most stars belong

• giants

• super giants

• white dwarfs

• main sequence

COmpared to Betelgeuse, Sirius B is what?

• cooler, brighter and bigger

• cooler, dimmer, smaller

• hotter, brighter, smaller

• hotter, dimmer, smaller

Main sequence stars show that as temperature increases what else happens?

• color reddens

• brightness increases

• size increases

• brightness decreases

This diagram does NOT show what feature?

• color

• temperature

• brightness

• location in sky

• size

Red Giants are different from main-sequence stars because why?

• They are cool but bright

• they are bright but hot

• they are big but dim

• they are hot and bright

Sirius B is NOT a main sequence star because why?

• It is hot but dim

• it is hot but bright

• it is cool but dim

• it is too small

Which of these stars has more luminosity than the sun?

• Sirius B

• North Star

• Bernard's Star

Which of these stars is hottest?

• Algol

• Betelguese

• NGC-5882

• Bernards Star