Stars and Galaxies
  • 1. What color star has the highest surface temperature?
A) white
B) yellow
C) red
D) blue
  • 2. Which means the same as luminosity?
A) absolute brightness
B) brightness
C) intrinsic brightness
D) apparent brightness
  • 3. Which is not part of a spiral galaxy?
A) super cluster
B) nuclueus
C) spiral arms
D) halo
  • 4. What is the most important factor that causes matter in a nebula to form clumps?
A) heating
B) gravitational attraction
C) molecular motion
D) rotation
  • 5. Which magnitude describes the brightest star?
A) 2.5
B) 1.3
C) -2.5
D) -0.5
  • 6. What is measured on the Y-axis?
A) diameter
B) temperature
C) luminosity
D) color
  • 7. Which type of star is located in the bottom center of the diagram?
A) white dwarf
B) main sequence star
C) giant
D) supergiant
  • 8. What type of star is topmost in the diagram?
A) white dwarf
B) supergiant
C) Sun-like
D) giant
  • 9. About how long does it take light from the Sun to reach Earth?
A) 8 minutes
B) 8 hours
C) 8 days
D) 8 seconds
  • 10. The most massive stars end their lives as which type of object?
A) white dwarf
B) black dwarf
C) black hole
D) neutron star
  • 11. Which is a group of stars, gas, and dust held together by gravity?
A) constellation
B) black hole
C) supergiant
D) galaxy
  • 12. Which is the most abundant element in the Sun?
A) hydrogen
B) oxygen
C) helium
D) carbon
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