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Stars and Galaxies

Practice Test
      
  1.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Betelgeuse  
  b.   Orion  
  c.   Polaris  
  d.   Sirius  
  Hint    
      
  2.Energy produced by the sun reaches the Earth through _________.  
  a.   radiation  
  b.   convection and radiation  
  c.   conduction  
  d.   convection  
  Hint    
      
  3.When a star becomes a supernova its brightness __________.  
  a.   decreases  
  b.   increases  
  c.   doesn't change  
  d.   vanishes  
  Hint    
      
  4.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   carbon, oxygen  
  c.   carbon, helium  
  d.   hydrogen, oxygen  
  Hint    
      
  5.A binary system is composed of ___________ stars.  
  a.   two  
  b.   three  
  c.   five  
  d.   four  
  Hint    
      
  6.Why are circumpolar constellations visible all year long?  
  a.   All constellations are visible all year long.  
  b.   because they are the brightest stars  
  c.   because they are the closest  
  d.   because they are located directly above the North Pole  
  Hint    
      
  7.When fusion occurs, the mass lost is converted into __________.  
  a.   liquid  
  b.   energy  
  c.   matter  
  d.   mass  
  Hint    
      
  8.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   gravity  
  b.   friction  
  c.   forces  
  d.   inertia  
  Hint    
      
  9.Our sun is considered a star of__________ temperature.  
  a.   low  
  b.   cool  
  c.   hot  
  d.   medium  
  Hint    
      
  10.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    
      
  11.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    
      
  12.Another way to define "nebula" is __________.  
  a.   old star  
  b.   young star  
  c.   dying star  
  d.   exploding star  
  Hint    
      
  13.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a galaxy  
  b.   a white dwarf  
  c.   a supernova  
  d.   a giant  
  Hint    
      
  14.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Central Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Ejections  
  Hint    
      
  15.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   brightness  
  b.   parallax  
  c.   parallel  
  d.   size  
  Hint    
      
  16.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   corona  
  b.   chromosphere  
  c.   surface  
  d.   photosphere  
  Hint    
      
  17.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   It doesn't orbit.  
  b.   the Milky Way  
  c.   the universe  
  d.   the solar system  
  Hint    
      
  18.An aurora, like the aurora borealis is caused by  
  a.   solarwind  
  b.   solar flares  
  c.   particles from solar flares  
  d.   CME's  
  Hint    
      
  19.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 rotation of the galaxy  
  d.   the Sun's rotation  
  Hint    
      
  20.__________ is the process that creates energy in the sun.  
  a.   Blue shift  
  b.   Fusion  
  c.   Parallax  
  d.   Fission  
  Hint    

 
   
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