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Stars and Galaxies

Practice Test
      
  1.Energy produced by the sun reaches the Earth through _________.  
  a.   convection  
  b.   radiation  
  c.   conduction  
  d.   convection and radiation  
  Hint    
      
  2.__________ is the process that creates energy in the sun.  
  a.   Blue shift  
  b.   Fusion  
  c.   Parallax  
  d.   Fission  
  Hint    
      
  3.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, helium  
  b.   hydrogen, helium  
  c.   carbon, oxygen  
  d.   hydrogen, oxygen  
  Hint    
      
  4.When a star becomes a supernova its brightness __________.  
  a.   vanishes  
  b.   increases  
  c.   decreases  
  d.   doesn't change  
  Hint    
      
  5.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their temperature  
  b.   gravity  
  c.   their age  
  d.   their weight  
  Hint    
      
  6.Which, if any, of the three types of galaxies occur the most often?  
  a.   elliptical  
  b.   They occur in equal amounts.  
  c.   irregular  
  d.   spiral  
  Hint    
      
  7.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   inertia  
  b.   gravity  
  c.   friction  
  d.   forces  
  Hint    
      
  8.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   absolute solitude  
  b.   absolute magnitude  
  c.   apparent magnitude  
  d.   apparent strength  
  Hint    
      
  9.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Sirius  
  b.   Orion  
  c.   Polaris  
  d.   Betelgeuse  
  Hint    
      
  10.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   photosphere  
  b.   surface  
  c.   chromosphere  
  d.   corona  
  Hint    
      
  11.Circumpolar constellations __________.  
  a.   are located in a circular constellation.  
  b.   are always located above the North Pole.  
  c.   appear to circle around the North Star as the Earth rotates.  
  d.   never appear around the North Pole.  
  Hint    
      
  12.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   gases  
  b.   dust  
  c.   clusters  
  d.   elements  
  Hint    
      
  13.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a white dwarf  
  b.   a giant  
  c.   a supernova  
  d.   a galaxy  
  Hint    
      
  14.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Coronal Materials Ejections  
  c.   Central Mass Ejections  
  d.   Coronal Mass Ejections  
  Hint    
      
  15.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the magnetic field associated with sunspots  
  b.   Earth's magnetic field  
  c.   the rotation of the galaxy  
  d.   the Sun's rotation  
  Hint    
      
  16.Why are circumpolar constellations visible all year long?  
  a.   because they are the closest  
  b.   because they are the brightest stars  
  c.   because they are located directly above the North Pole  
  d.   All constellations are visible all year long.  
  Hint    
      
  17.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute measure  
  b.   absolute magnitude  
  c.   apparent measure  
  d.   apparent magnitude  
  Hint    
      
  18.An aurora, like the aurora borealis is caused by  
  a.   particles from solar flares  
  b.   solarwind  
  c.   solar flares  
  d.   CME's  
  Hint    
      
  19.When fusion occurs, the mass lost is converted into __________.  
  a.   mass  
  b.   liquid  
  c.   energy  
  d.   matter  
  Hint    
      
  20.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallel  
  b.   size  
  c.   parallax  
  d.   brightness  
  Hint    

 
   
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