Classifying Stars

Which statement describes the general relationship between the temperature and the luminosity of main sequence stars?

• As temperature decreases, luminosity increases

• As temperature decreases, luminosity remains the same

• As temperature increases, luminosity increases

• As temperature increases, luminosity remains the same

The Hertzsprung-Russell diagram shows that main-sequence stars:

• increase in brightness as they increase in temperature

• are mostly hot and dim

• decrease in brightness as they increase in temperature

• are mostly cool and bright

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

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

• 0

• 1

• 4.5

• -4.5

The color of a star tells us its

• magnitude

• temperature

• size

• age

Which list shows stars in order of increasing temperature?

• Barnard's Star, Polaris, Sirius, Rigel

• Aldebaran, the Sun, Rigel, Procyon B

• Rigel, Polaris, Aldebaran, Barnard's Star

• Procyon B, Alpha Centauri, Polaris, Betelgeuse

Characteristics used to classify stars include:

• size, distance, and brightness

• distance, size, and color

• size, brightness, and temperature

• color, brightness, and distance

Name the stars on the diagram that are blue or blue-white.

• Algol, Van Maanen, and Deneb

• Canopus, Procyon, and Sun

• Mira, Betelgeuse, and Barnard's Star

• Algol, Regulus, and Spica

Describe the features of the star Deneb.

• Bright, white in color, 10,000 C

• Dim, yellow in color, 6,000 C

• Semi-bright, white in color, 8,000 C

• Bright, blue-white in color, 20,000 C

Tags

NGSS.HS-ESS1-3

What object forms by the collapse of a large sphere of gases causing the nuclear fusion of lighter elements into heavier element?

• a comet

• a planet

• a star

• a moon

Tags

NGSS.HS-ESS1-1