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Stars and Galaxies

Practice Test
      
  1.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the Sun's rotation  
  b.   the magnetic field associated with sunspots  
  c.   Earth's magnetic field  
  d.   the rotation of the galaxy  
  Hint    
      
  2.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Blue shift  
  c.   Parallax  
  d.   Fusion  
  Hint    
      
  3.Our sun is considered a star of__________ temperature.  
  a.   cool  
  b.   medium  
  c.   hot  
  d.   low  
  Hint    
      
  4.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   chromosphere  
  b.   surface  
  c.   corona  
  d.   photosphere  
  Hint    
      
  5.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Orion  
  b.   Sirius  
  c.   Betelgeuse  
  d.   Polaris  
  Hint    
      
  6.Why are circumpolar constellations visible all year long?  
  a.   because they are the closest  
  b.   because they are the brightest stars  
  c.   because they are located directly above the North Pole  
  d.   All constellations are visible all year long.  
  Hint    
      
  7.Energy produced by the sun reaches the Earth through _________.  
  a.   conduction  
  b.   radiation  
  c.   convection  
  d.   convection and radiation  
  Hint    
      
  8.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    
      
  9.Another way to define "nebula" is __________.  
  a.   dying star  
  b.   old star  
  c.   exploding star  
  d.   young star  
  Hint    
      
  10.A binary system is composed of ___________ stars.  
  a.   four  
  b.   two  
  c.   three  
  d.   five  
  Hint    
      
  11.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   gases  
  c.   dust  
  d.   elements  
  Hint    
      
  12.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a white dwarf  
  b.   a galaxy  
  c.   a giant  
  d.   a supernova  
  Hint    
      
  13.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Coronal Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Central Mass Ejections  
  Hint    
      
  14.When a star becomes a supernova its brightness __________.  
  a.   decreases  
  b.   increases  
  c.   vanishes  
  d.   doesn't change  
  Hint    
      
  15.When fusion occurs, the mass lost is converted into __________.  
  a.   energy  
  b.   matter  
  c.   liquid  
  d.   mass  
  Hint    
      
  16.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallel  
  b.   parallax  
  c.   size  
  d.   brightness  
  Hint    
      
  17.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   hydrogen, oxygen  
  c.   carbon, oxygen  
  d.   carbon, helium  
  Hint    
      
  18.An aurora, like the aurora borealis is caused by  
  a.   particles from solar flares  
  b.   CME's  
  c.   solarwind  
  d.   solar flares  
  Hint    
      
  19.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   forces  
  b.   friction  
  c.   inertia  
  d.   gravity  
  Hint    
      
  20.Circumpolar constellations __________.  
  a.   never appear around the North Pole.  
  b.   are located in a circular constellation.  
  c.   are always located above the North Pole.  
  d.   appear to circle around the North Star as the Earth rotates.  
  Hint    

 
   
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