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Stars and Galaxies

Practice Test
      
  1.Our sun is considered a star of__________ temperature.  
  a.   low  
  b.   hot  
  c.   cool  
  d.   medium  
  Hint    
      
  2.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the solar system  
  b.   the universe  
  c.   It doesn't orbit.  
  d.   the Milky Way  
  Hint    
      
  3.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Blue shift  
  c.   Fusion  
  d.   Parallax  
  Hint    
      
  4.Circumpolar constellations __________.  
  a.   never appear around the North Pole.  
  b.   appear to circle around the North Star as the Earth rotates.  
  c.   are always located above the North Pole.  
  d.   are located in a circular constellation.  
  Hint    
      
  5.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    
      
  6.Which, if any, of the three types of galaxies occur the most often?  
  a.   irregular  
  b.   They occur in equal amounts.  
  c.   spiral  
  d.   elliptical  
  Hint    
      
  7.An aurora, like the aurora borealis is caused by  
  a.   particles from solar flares  
  b.   solarwind  
  c.   solar flares  
  d.   CME's  
  Hint    
      
  8.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    
      
  9.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallel  
  b.   size  
  c.   parallax  
  d.   brightness  
  Hint    
      
  10.A binary system is composed of ___________ stars.  
  a.   four  
  b.   three  
  c.   five  
  d.   two  
  Hint    
      
  11.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   hydrogen, oxygen  
  c.   carbon, helium  
  d.   carbon, oxygen  
  Hint    
      
  12.Energy produced by the sun reaches the Earth through _________.  
  a.   radiation  
  b.   conduction  
  c.   convection  
  d.   convection and radiation  
  Hint    
      
  13.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent magnitude  
  b.   absolute magnitude  
  c.   absolute measure  
  d.   apparent measure  
  Hint    
      
  14.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   gravity  
  b.   friction  
  c.   forces  
  d.   inertia  
  Hint    
      
  15.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Orion  
  b.   Sirius  
  c.   Betelgeuse  
  d.   Polaris  
  Hint    
      
  16.When a star becomes a supernova its brightness __________.  
  a.   decreases  
  b.   vanishes  
  c.   increases  
  d.   doesn't change  
  Hint    
      
  17.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Coronal Materials Ejections  
  c.   Coronal Mass Ejections  
  d.   Central Mass Ejections  
  Hint    
      
  18.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   surface  
  b.   chromosphere  
  c.   corona  
  d.   photosphere  
  Hint    
      
  19.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   gases  
  b.   elements  
  c.   dust  
  d.   clusters  
  Hint    
      
  20.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent magnitude  
  b.   absolute magnitude  
  c.   absolute solitude  
  d.   apparent strength  
  Hint    

 
   
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