Classifying Stars

Red dwarf stars are the _______.

• smallest

• largest

• hottest

• farthest away

Using the figure, name the star that is very dim and red in color.

• Barnard's Star

• Mira

• Betelgeuse

• Alpha Centauri A

Tags

NGSS.HS-ESS1-3

What color are the hottest stars?

• red

• yellow

• orange

• blue

A student classifies stars using the Hertzsprung-Russell diagram.

One star has an intrinsic brightness similar to Rigel and a surface temperature similar to Spica. What is the star’s classification?

• Main Sequence

• Supergiant

• Red Giant

• White Dwarf

A newly discovered star was determined to be of similar surface temperature and intrinsic brightness as the sun. Based on the Hertzsprung-Russell diagram in question #1, what is a prediction for the color of this star?

• Blue

• White

• Red

• Yellow

Hertzsprung and Russell based their diagram on scientific evidence. The diagram is very important to the scientific community because it helps astronomers classify stars. Many astronomers use the diagram to-

• learn more about the field of astronomy

• explain how galaxies behave

• determine temperatures of nebulae

• organize information and analyze patterns

Which component(s) of the universe can be classified by brightness and surface temperature?

• Galaxies only

• Stars only

• Galaxies and stars

• Galaxies, nebulae, and stars

Tags

NGSS.HS-ESS1-3

Based on the H-R Diagram, which list accurately places various stars in order from highest to lowest average surface temperature?

• C, B, E, A, D

• C, D, A, B, E

• D, A, E, B, C

• E, B, D, A, C

What kind of star would have a spectral class of A and an absolute magnitude of -10?

• Main sequence

• Giants

• Super giant

• White dwarf

Based on this diagram, which type of stars would belong to spectral class B and have a low luminosity?

• Supergiants

• Giants

• Main Sequence

• White Dwarfs