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

 
   
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