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Stars and Galaxies

Practice Test
      
  1.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent strength  
  b.   absolute solitude  
  c.   apparent magnitude  
  d.   absolute magnitude  
  Hint    
      
  2.Which, if any, of the three types of galaxies occur the most often?  
  a.   spiral  
  b.   They occur in equal amounts.  
  c.   elliptical  
  d.   irregular  
  Hint    
      
  3.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Polaris  
  b.   Orion  
  c.   Betelgeuse  
  d.   Sirius  
  Hint    
      
  4.What does CME stand for?  
  a.   Central Mass Ejections  
  b.   Coronal Mass Emissions  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Ejections  
  Hint    
      
  5.Another way to define "nebula" is __________.  
  a.   old star  
  b.   young star  
  c.   exploding star  
  d.   dying star  
  Hint    
      
  6.When fusion occurs, the mass lost is converted into __________.  
  a.   mass  
  b.   liquid  
  c.   matter  
  d.   energy  
  Hint    
      
  7.An aurora, like the aurora borealis is caused by  
  a.   solar flares  
  b.   CME's  
  c.   particles from solar flares  
  d.   solarwind  
  Hint    
      
  8.Our sun is considered a star of__________ temperature.  
  a.   hot  
  b.   cool  
  c.   low  
  d.   medium  
  Hint    
      
  9.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   Earth's magnetic field  
  b.   the rotation of the galaxy  
  c.   the magnetic field associated with sunspots  
  d.   the Sun's rotation  
  Hint    
      
  10.When a star becomes a supernova its brightness __________.  
  a.   increases  
  b.   doesn't change  
  c.   vanishes  
  d.   decreases  
  Hint    
      
  11.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   dust  
  b.   elements  
  c.   gases  
  d.   clusters  
  Hint    
      
  12.Energy produced by the sun reaches the Earth through _________.  
  a.   convection and radiation  
  b.   conduction  
  c.   radiation  
  d.   convection  
  Hint    
      
  13.A binary system is composed of ___________ stars.  
  a.   four  
  b.   three  
  c.   five  
  d.   two  
  Hint    
      
  14.Why are circumpolar constellations visible all year long?  
  a.   All constellations are visible all year long.  
  b.   because they are the closest  
  c.   because they are the brightest stars  
  d.   because they are located directly above the North Pole  
  Hint    
      
  15.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   brightness  
  b.   parallel  
  c.   parallax  
  d.   size  
  Hint    
      
  16.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   photosphere  
  b.   surface  
  c.   chromosphere  
  d.   corona  
  Hint    
      
  17.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, oxygen  
  b.   hydrogen, helium  
  c.   carbon, oxygen  
  d.   carbon, helium  
  Hint    
      
  18.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   forces  
  b.   friction  
  c.   inertia  
  d.   gravity  
  Hint    
      
  19.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent measure  
  b.   absolute magnitude  
  c.   apparent magnitude  
  d.   absolute measure  
  Hint    
      
  20.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a supernova  
  b.   a white dwarf  
  c.   a galaxy  
  d.   a giant  
  Hint    

 
   
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