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Stars and Galaxies

Practice Test
      
  1.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   dust  
  b.   elements  
  c.   gases  
  d.   clusters  
  Hint    
      
  2.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallax  
  b.   brightness  
  c.   size  
  d.   parallel  
  Hint    
      
  3.What does CME stand for?  
  a.   Coronal Mass Ejections  
  b.   Coronal Materials Ejections  
  c.   Central Mass Ejections  
  d.   Coronal Mass Emissions  
  Hint    
      
  4.When a star becomes a supernova its brightness __________.  
  a.   doesn't change  
  b.   decreases  
  c.   increases  
  d.   vanishes  
  Hint    
      
  5.__________ is the process that creates energy in the sun.  
  a.   Fusion  
  b.   Fission  
  c.   Blue shift  
  d.   Parallax  
  Hint    
      
  6.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, oxygen  
  b.   hydrogen, oxygen  
  c.   hydrogen, helium  
  d.   carbon, helium  
  Hint    
      
  7.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   absolute magnitude  
  b.   absolute solitude  
  c.   apparent strength  
  d.   apparent magnitude  
  Hint    
      
  8.Circumpolar constellations __________.  
  a.   are always located above the North Pole.  
  b.   never appear around the North Pole.  
  c.   appear to circle around the North Star as the Earth rotates.  
  d.   are located in a circular constellation.  
  Hint    
      
  9.Our sun is considered a star of__________ temperature.  
  a.   medium  
  b.   low  
  c.   cool  
  d.   hot  
  Hint    
      
  10.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   friction  
  b.   gravity  
  c.   inertia  
  d.   forces  
  Hint    
      
  11.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent measure  
  b.   absolute magnitude  
  c.   apparent magnitude  
  d.   absolute measure  
  Hint    
      
  12.Another way to define "nebula" is __________.  
  a.   dying star  
  b.   exploding star  
  c.   young star  
  d.   old star  
  Hint    
      
  13.An aurora, like the aurora borealis is caused by  
  a.   CME's  
  b.   solarwind  
  c.   solar flares  
  d.   particles from solar flares  
  Hint    
      
  14.A binary system is composed of ___________ stars.  
  a.   three  
  b.   five  
  c.   two  
  d.   four  
  Hint    
      
  15.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the rotation of the galaxy  
  b.   the magnetic field associated with sunspots  
  c.   the Sun's rotation  
  d.   Earth's magnetic field  
  Hint    
      
  16.Which, if any, of the three types of galaxies occur the most often?  
  a.   elliptical  
  b.   irregular  
  c.   spiral  
  d.   They occur in equal amounts.  
  Hint    
      
  17.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   chromosphere  
  b.   surface  
  c.   corona  
  d.   photosphere  
  Hint    
      
  18.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the solar system  
  b.   the Milky Way  
  c.   It doesn't orbit.  
  d.   the universe  
  Hint    
      
  19.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a giant  
  b.   a supernova  
  c.   a white dwarf  
  d.   a galaxy  
  Hint    
      
  20.Why are circumpolar constellations visible all year long?  
  a.   because they are the brightest stars  
  b.   All constellations are visible all year long.  
  c.   because they are located directly above the North Pole  
  d.   because they are the closest  
  Hint    

 
   
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