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Stars and Galaxies

Practice Test
      
  1.An aurora, like the aurora borealis is caused by  
  a.   solar flares  
  b.   particles from solar flares  
  c.   solarwind  
  d.   CME's  
  Hint    
      
  2.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Sirius  
  b.   Orion  
  c.   Polaris  
  d.   Betelgeuse  
  Hint    
      
  3.Our sun is considered a star of__________ temperature.  
  a.   hot  
  b.   low  
  c.   medium  
  d.   cool  
  Hint    
      
  4.When fusion occurs, the mass lost is converted into __________.  
  a.   matter  
  b.   liquid  
  c.   energy  
  d.   mass  
  Hint    
      
  5.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   dust  
  b.   gases  
  c.   elements  
  d.   clusters  
  Hint    
      
  6.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 located directly above the North Pole  
  d.   because they are the brightest stars  
  Hint    
      
  7.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   gravity  
  b.   their temperature  
  c.   their age  
  d.   their weight  
  Hint    
      
  8.Energy produced by the sun reaches the Earth through _________.  
  a.   convection  
  b.   conduction  
  c.   convection and radiation  
  d.   radiation  
  Hint    
      
  9.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   size  
  b.   parallax  
  c.   brightness  
  d.   parallel  
  Hint    
      
  10.What does CME stand for?  
  a.   Coronal Mass Ejections  
  b.   Coronal Mass Emissions  
  c.   Coronal Materials Ejections  
  d.   Central Mass Ejections  
  Hint    
      
  11.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a giant  
  b.   a galaxy  
  c.   a supernova  
  d.   a white dwarf  
  Hint    
      
  12.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the magnetic field associated with sunspots  
  b.   Earth's magnetic field  
  c.   the Sun's rotation  
  d.   the rotation of the galaxy  
  Hint    
      
  13.Another way to define "nebula" is __________.  
  a.   old star  
  b.   dying star  
  c.   young star  
  d.   exploding star  
  Hint    
      
  14.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent strength  
  b.   absolute solitude  
  c.   apparent magnitude  
  d.   absolute magnitude  
  Hint    
      
  15.Which, if any, of the three types of galaxies occur the most often?  
  a.   They occur in equal amounts.  
  b.   spiral  
  c.   irregular  
  d.   elliptical  
  Hint    
      
  16.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, oxygen  
  b.   hydrogen, helium  
  c.   carbon, helium  
  d.   hydrogen, oxygen  
  Hint    
      
  17.__________ is the process that creates energy in the sun.  
  a.   Blue shift  
  b.   Parallax  
  c.   Fusion  
  d.   Fission  
  Hint    
      
  18.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   forces  
  b.   inertia  
  c.   friction  
  d.   gravity  
  Hint    
      
  19.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    
      
  20.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    

 
   
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