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