Classifying Stars

What color are the hottest star?

• Red

• Orange

• Yellow

• Blue

What color are the coolest stars?

• Red

• Yellow

• Orange

• Blue

Where on the HR star diagram are the main sequence stars?

• Top right

• Middle

• Bottom left

What does the luminosity of a star indicate about its brightness?

• If it's a negative number, it's a bright star

• If it's a positive number, it's a dim star

• Its how many times brighter the star is compared to our sun

What does the absolute magnitude/ luminosity indicate about a star?

• Its color

• It's the actual brightness of a star

• It tells how many times brighter it is compared to our sun

What stage of life is OUR SUN in on the HR Diagram?

• Dwarf

• Giant

• Main Sequence

Approximately what is our sun's absolute magnitude/ luminosity?

• 0

• 1

• 4.5

• -4.5

Which location represents a star with average brightness and temperature?

• A

• B

• C

• D

Tags

NGSS.HS-ESS1-3

Compared to the temperature and luminosity of the star Polaris, the star Sirius is

• hotter and more luminous

• hotter and less luminous

• cooler and more luminous

• cooler and less luminous

Tags

NGSS.HS-ESS1-3

Compared to the surface temperature and luminosity of massive stars in the Main sequence, the smaller stars in the Main Sequence are

• hotter and less luminous

• hotter and more luminous

• cooler and less luminous

• cooler and more luminous