Quiz 1 Answers

• 1. A small cluster of galaxies of which the Milky Way is a member is the
  
  
  • a. Local Group
  • b. Pluto
  • c. Sagittarius
  • d. Coma cluster
  
  
  
  
• 2. The rotation curve of our galaxy supports the thesis that
  
  
  • a. stars are rotating in both directions around the galaxy
  • b. the rotating motion of the corona is jerky and uneven
  • c. about 90% of the mass of our galaxy is dark matter
  • d. all of the above
  
  
  
  
• 3. The globular clusters of the galaxy are located primarily in the
  
  
  • a. Sagittarius spiral arm
  • b. halo of the galaxy
  • c. disk of the galaxy
  • d. central galactic bulge
  
  
  
  
• 4. The galaxy type which most often has grown larger through galactic cannibalism is
  
  
  • a. irregular
  • b. normal
  • c. elliptical
  • d. over-grown
  
  
  
  
• 5. The kind of stars most useful in determining distances within the local group of galaxies are:
  
  
  • a. white dwarfs (like Sirius B)
  • b. blue wizards (like Oz)
  • c. supernovae (like SN1987A)
  • d. variable stars (like Cepheids)
  
  
  
  
• 6. The disk of the Milky Way differs from the halo in that the disk contains many
  
  
  • a. Population I stars
  • b. Population II stars
  • c. Population III stars
  • d. Population IV stars
  • e. Population V stars