Quiz 3

• 1. Masses of galaxies are determined by
  
  
  • a. Motion of binary galaxies
  • b. Motion of galaxies within clusters
  • c. Galaxy rotation curves
  • d. All of the above
  
  
  
  
• 2. Galaxies in clusters
  
  
  • b. Sometimes collide
  
  
  
  
• 3. The evolutionary path of galaxies
  
  
  • c. is not simple, depending on the details of collisions
  
  
  
  
• 4. A galaxy composed almost exclusively of dark matter is called
  
  
  • d. a dark galaxy