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Stars and Galaxies

Practice Test
      
  1.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Polaris  
  b.   Betelgeuse  
  c.   Orion  
  d.   Sirius  
  Hint    
      
  2.Which, if any, of the three types of galaxies occur the most often?  
  a.   spiral  
  b.   irregular  
  c.   elliptical  
  d.   They occur in equal amounts.  
  Hint    
      
  3.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a giant  
  b.   a galaxy  
  c.   a white dwarf  
  d.   a supernova  
  Hint    
      
  4.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   brightness  
  b.   parallax  
  c.   parallel  
  d.   size  
  Hint    
      
  5.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Fusion  
  c.   Parallax  
  d.   Blue shift  
  Hint    
      
  6.Another way to define "nebula" is __________.  
  a.   old star  
  b.   young star  
  c.   exploding star  
  d.   dying star  
  Hint    
      
  7.Our sun is considered a star of__________ temperature.  
  a.   medium  
  b.   hot  
  c.   low  
  d.   cool  
  Hint    
      
  8.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   gases  
  c.   elements  
  d.   dust  
  Hint    
      
  9.When fusion occurs, the mass lost is converted into __________.  
  a.   liquid  
  b.   mass  
  c.   matter  
  d.   energy  
  Hint    
      
  10.Circumpolar constellations __________.  
  a.   are located in a circular constellation.  
  b.   appear to circle around the North Star as the Earth rotates.  
  c.   are always located above the North Pole.  
  d.   never appear around the North Pole.  
  Hint    
      
  11.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   surface  
  b.   photosphere  
  c.   chromosphere  
  d.   corona  
  Hint    
      
  12.A binary system is composed of ___________ stars.  
  a.   four  
  b.   five  
  c.   two  
  d.   three  
  Hint    
      
  13.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent magnitude  
  b.   absolute magnitude  
  c.   absolute measure  
  d.   apparent measure  
  Hint    
      
  14.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   hydrogen, oxygen  
  c.   carbon, helium  
  d.   carbon, oxygen  
  Hint    
      
  15.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   absolute magnitude  
  b.   apparent strength  
  c.   apparent magnitude  
  d.   absolute solitude  
  Hint    
      
  16.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   inertia  
  b.   forces  
  c.   gravity  
  d.   friction  
  Hint    
      
  17.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Central Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Ejections  
  Hint    
      
  18.Why are circumpolar constellations visible all year long?  
  a.   because they are the closest  
  b.   because they are the brightest stars  
  c.   All constellations are visible all year long.  
  d.   because they are located directly above the North Pole  
  Hint    
      
  19.An aurora, like the aurora borealis is caused by  
  a.   CME's  
  b.   solarwind  
  c.   particles from solar flares  
  d.   solar flares  
  Hint    
      
  20.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   Earth's magnetic field  
  b.   the magnetic field associated with sunspots  
  c.   the Sun's rotation  
  d.   the rotation of the galaxy  
  Hint    

 
   
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