Lab #3: Properties of Stars H-R Diagram

What are the four main categories of stars shown on the H-R Diagram?

• Red Dwarfs, Blue Giants, Main Sequence, Supergiants

• White Dwarfs, Main Sequence, Giants, Supergiants

• Protostars, Main Sequence, Red Giants, Neutron Stars

• Black Holes, White Dwarfs, Main Sequence, Supergiants

How is the luminosity of stars represented on the H-R Diagram relative to the Sun?

• Stars above the Sun's luminosity are dimmer, and stars below are brighter.

• Stars above the Sun's luminosity are brighter, and stars below are dimmer.

• Luminosity is only shown for stars larger than the Sun.

• Luminosity is measured in Kelvin, not relative to the Sun.

What is the relationship between a star's size and its lifespan?

• Larger stars have longer lifespans.

• Smaller stars have shorter lifespans.

• There is an inverse relationship: as star size increases, lifespan decreases.

• Star size and lifespan are directly proportional.

Which type of star is generally the hottest based on its surface temperature and color?

• Red stars (M class)

• Yellow stars (F, G class)

• Orange stars (K class)

• Blue stars (O, B class)

Why would a white dwarf star be so dim despite its high temperature?

• It is far from Earth.

• It is very small.

• It is very large.

• It is very cool.

Why would a red giant star be so bright despite its low temperature?

• It is close to Earth.

• It is very small.

• It is very large.

• It is very hot.