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Stars and Galaxies

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

 
   
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