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Stars and Galaxies

Practice Test
      
  1.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a galaxy  
  b.   a giant  
  c.   a white dwarf  
  d.   a supernova  
  Hint    
      
  2.What does CME stand for?  
  a.   Coronal Mass Ejections  
  b.   Coronal Mass Emissions  
  c.   Central Mass Ejections  
  d.   Coronal Materials Ejections  
  Hint    
      
  3.Our sun is considered a star of__________ temperature.  
  a.   hot  
  b.   medium  
  c.   low  
  d.   cool  
  Hint    
      
  4.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   inertia  
  b.   forces  
  c.   gravity  
  d.   friction  
  Hint    
      
  5.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Orion  
  b.   Polaris  
  c.   Sirius  
  d.   Betelgeuse  
  Hint    
      
  6.Energy produced by the sun reaches the Earth through _________.  
  a.   radiation  
  b.   convection  
  c.   convection and radiation  
  d.   conduction  
  Hint    
      
  7.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the universe  
  b.   the solar system  
  c.   the Milky Way  
  d.   It doesn't orbit.  
  Hint    
      
  8.When fusion occurs, the mass lost is converted into __________.  
  a.   energy  
  b.   matter  
  c.   mass  
  d.   liquid  
  Hint    
      
  9.Which, if any, of the three types of galaxies occur the most often?  
  a.   spiral  
  b.   irregular  
  c.   They occur in equal amounts.  
  d.   elliptical  
  Hint    
      
  10.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   elements  
  c.   dust  
  d.   gases  
  Hint    
      
  11.Another way to define "nebula" is __________.  
  a.   exploding star  
  b.   dying star  
  c.   young star  
  d.   old star  
  Hint    
      
  12.An aurora, like the aurora borealis is caused by  
  a.   solarwind  
  b.   solar flares  
  c.   CME's  
  d.   particles from solar flares  
  Hint    
      
  13.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, helium  
  b.   hydrogen, oxygen  
  c.   hydrogen, helium  
  d.   carbon, oxygen  
  Hint    
      
  14.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   photosphere  
  b.   chromosphere  
  c.   surface  
  d.   corona  
  Hint    
      
  15.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   absolute solitude  
  b.   absolute magnitude  
  c.   apparent magnitude  
  d.   apparent strength  
  Hint    
      
  16.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the rotation of the galaxy  
  b.   the Sun's rotation  
  c.   Earth's magnetic field  
  d.   the magnetic field associated with sunspots  
  Hint    
      
  17.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their age  
  b.   gravity  
  c.   their temperature  
  d.   their weight  
  Hint    
      
  18.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallel  
  b.   brightness  
  c.   parallax  
  d.   size  
  Hint    
      
  19.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute magnitude  
  b.   apparent magnitude  
  c.   absolute measure  
  d.   apparent measure  
  Hint    
      
  20.When a star becomes a supernova its brightness __________.  
  a.   doesn't change  
  b.   increases  
  c.   vanishes  
  d.   decreases  
  Hint    

 
   
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