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Stars and Galaxies

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

 
   
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