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Stars and Galaxies

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

 
   
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