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Lesson: Classifying Stars by Brightness and Temperature

Sample Question Videos

Worksheet • 9 Questions • 1 Video

Q1:

An astronomer looks at the light coming from two stars: star A and star B. Star B is emitting bluer light than star A. Which star is hotter?

  • AStar A
  • BStar B

Q2:

The diagram shows six stars. Each star is colored approximately according to the light that it emits.

Which star is the hottest?

  • A(c)
  • B(b)
  • C(a)
  • D(f)
  • E(d)

Which star is the coolest?

  • A(e)
  • B(f)
  • C(a)
  • D(b)
  • E(d)

Which star emits light that is most similar to the Sun?

  • A(f)
  • B(b)
  • C(a)
  • D(c)
  • E(d)

Q3:

The table shows the absolute magnitudes of several nearby stars.

Star Gliese 687 Epsilon Eridani Ross 614 Procyon A
Absolute Magnitude 10.9 6.2 16.2 2.7

Which star is the brightest?

  • AProcyon A
  • BGliese 687
  • CEpsilon Eridani
  • DRoss 614

Which star is the dimmest?

  • ARoss 614
  • BEpsilon Eridani
  • CGliese 687
  • DProcyon A

Q4:

The lower the value of the absolute magnitude of a star, the that star is. The higher the value of the absolute magnitude of a star, the that star is.

  • Abrighter, dimmer
  • Bfurther, closer
  • Cdimmer, brighter
  • Ddimmer, cooler
  • Ebrighter, hotter

Q5:

The diagram shows six stars. Each star is colored approximately according to the light that it emits. List the stars in order from lowest to highest temperature.

  • A(e), (a), (d), (b), (f), (c)
  • B(c), (e), (a), (d), (b), (f)
  • C(e), (a), (d), (b), (c), (f)
  • D(f), (e), (a), (d), (b), (c)
  • E(e), (a), (b), (d), (f), (c)

Q6:

The diagram shows the axes for a Hertzsprung-Russell diagram and four regions within the diagram.

What types of stars are found in region A?

  • AWhite dwarfs
  • BBlack holes
  • CMain sequence stars
  • DRed supergiants
  • ERed giants

What types of stars are found in region B?

  • AMain sequence stars
  • BNeutron stars
  • CWhite dwarfs
  • DRed supergiants
  • ERed giants

What type of stars are found in region D?

  • ARed giants
  • BBlack dwarfs
  • CWhite dwarfs
  • DNeutron stars
  • EMain sequence stars

Q7:

The table shows the colors and absolute magnitudes of some nearby stars.

Star Absolute Magnitude Color
Proxima Centauri 15.5 Orange
Sirius A 1.4 Blue
Procyon B 13.0 Yellow
Gliese 832 10.2 Red

Which star is the hottest?

  • ASirius A
  • BProxima Centauri
  • CGliese 832
  • DProcyon B

Which star is the coolest?

  • AGliese 832
  • BProcyon B
  • CSirius A
  • DProxima Centauri

Which star is the brightest?

  • ASirius A
  • BProxima Centauri
  • CGliese 832
  • DProcyon B

Which star is the dimmest?

  • AProxima Centauri
  • BSirius A
  • CGliese 832
  • DProcyon B

Q8:

The higher the surface temperature of a star is, the the light coming from it. The lower the surface temperature of a star is, the the light coming from it.

  • Abluer, redder
  • Bgreener, bluer
  • Credder, bluer
  • Dredder, greener
  • Ebluer, bluer

Q9:

Star A has an absolute magnitude of 13.1 and Star B has an absolute magnitude of 2.8. Which star is brighter?

  • AStar A
  • BStar B
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