Section #: 31.2 Other Galaxies in the Universe

Practice Test
      
  1.The redshift of quasars measures __________.  
  a.   their age of formation  
  b.   their shape  
  c.   their distance from Earth  
  d.   their intensity  
  Hint    
      
  2.Most of the mass in cluster galaxies is __________.  
  a.   spinning  
  b.   visible  
  c.   pulsating  
  d.   invisible  
  Hint    
      
  3.The smallest galaxies are called __________ and the largest are called __________.  
  a.   dwarf ellipticals, giant spirals  
  b.   dwarf spirals, giant ellipticals  
  c.   dwarf ellipticals, giant ellipticals  
  d.   irregular, ellipticals  
  Hint    
      
  4.Which galaxy shape is not a part of Hubble's classification system?  
  a.   spiral  
  b.   spherical  
  c.   elliptical  
  d.   irregular  
  Hint    
      
  5.What was the first galaxy to be discovered outside of Earth's galaxy?  
  a.   the Virgo  
  b.   the Andromeda Galaxy  
  c.   the Local Group  
  d.   the Sagittarius Galaxy  
  Hint    
      
  6.Which of the galaxies shown has an elliptical shape?



 
  a.   A  
  b.   B  
  c.   C  
  d.   D  
  Hint    
      
  7.Galaxies that are extremely bright are called __________.  
  a.   radio galaxies  
  b.   spiral galaxies  
  c.   active galactic nuclei  
  d.   superclusters  
  Hint    
      
  8.Galaxies are organized into large groups called __________.  
  a.   variable galaxies  
  b.   super galaxies  
  c.   solar systems  
  d.   superclusters  
  Hint    
      
  9.Which of the following did Hubble discover?  
  a.   radio galaxies  
  b.   Earth's universe is expanding.  
  c.   the inflationary universe model  
  d.   quasars  
  Hint    
      
  10.How did Hubble categorize galaxies?  
  a.   shapes  
  b.   luminosity  
  c.   distance from the Milky Way  
  d.   pulsating variable stars  
  Hint    
      
  11.Which of the galaxies shown has the same shape of our galaxy?



 
  a.   A  
  b.   B  
  c.   C  
  d.   D  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies