Star Classification

Which of the following characteristics determines the color of a star?

• Luminosity

• Temperature

• Distance

• Mass

Answer explanation

Temperature determines color.

HR diagrams are most useful for

• Locating stars

• Classifying stars

• Locating galaxies

• Classifying galaxies

Tags

NGSS.HS-ESS1-3

According to the HR diagram, what is the approximate surface temperature of Alcor?

• 3,000 K

• 5,000 K

• 10,000 K

• 20,000 K

Most of the stars on the HR diagram (90%) are classified as

• Main sequence stars

• Supergiants

• Giants

• White dwarfs

A star that is several thousand times brighter than the Sun with a temperature lower

than 4,000 K would be classified as —

Select the group and spectral class. Two correct answers.

Tags

NGSS.HS-ESS1-3

Which spectral class does our star, the sun, belong to?

• M

• K

• G

• F

A star that is several thousand times brighter than the Sun with a temperature lower

than 4,000 K would be classified as —

Select TWO correct answers.

Tags

NGSS.HS-ESS1-3

What color of star is the hottest?

• Blue

• Red

• Yellow

• Orange

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

What color of star is the coolest?

• Red

• Yellow

• Blue

• White

Most stars are made of which gases?

• Hydrogen only

• Hydrogen and Lithium

• Hydrogen and Sodium

• Hydrogen and Helium

Tags

NGSS.HS-ESS1-3