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