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Stars and Galaxies

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

 
   
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