Star Classification

What is the relationship between temperature and magnitude for stars on the main sequence?

• As the temperature decreases, the magnitude increases.

• As the temperature increases, the magnitude increases.

• As the temperature increases, the magnitude decreases.

• As the temperature increases, the magnitude stays the same.

Which group of stars varies the most in temperature and luminosity?

• White dwarf

• supergiant

• Main sequence

• giant

As a star changes color from red to blue, describe what happens to its surface temperature.

• The surface temperature increases.

• The surface temperature decreases.

• The surface temperature does not change.

A main sequence star that is 10,000 times more luminous than the sun most likely has a temperature of ____

• 3500

• 15000

• 1000

• 25,000 K.

A white dwarf star with a temperature of approximately 10,000 K would have a luminosity of

• 10,000-100,000,000

• 10-1000

• 1-100

• 0.01 - 0.0001.

A massive star with a temperature of 20,000 K and a luminosity of nearly 1,000,000 would be classified as what type of star?

• supergiant

• white dwarf

• main sequence

• giant

What is the temperature of the sun?

• 5,700 K

• 10,000 K

• 2,000 K

• 1,750 K

What is the luminosity of sun?

• 1000

• 100

• 10

• 1

What type of star is the sun?

• supergiant

• white dwarf

• main sequence

• giant

Which of the following is not a piece of information given by a H-R diagram?

• Chemical Composition

• Luminosity

• Age

• Temperature