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Stars and Galaxies

Practice Test
      
  1.Circumpolar constellations __________.  
  a.   appear to circle around the North Star as the Earth rotates.  
  b.   are located in a circular constellation.  
  c.   never appear around the North Pole.  
  d.   are always located above the North Pole.  
  Hint    
      
  2.Another way to define "nebula" is __________.  
  a.   young star  
  b.   old star  
  c.   dying star  
  d.   exploding star  
  Hint    
      
  3.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the Milky Way  
  b.   the solar system  
  c.   It doesn't orbit.  
  d.   the universe  
  Hint    
      
  4.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent magnitude  
  b.   absolute measure  
  c.   apparent measure  
  d.   absolute magnitude  
  Hint    
      
  5.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their temperature  
  b.   their age  
  c.   gravity  
  d.   their weight  
  Hint    
      
  6.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   elements  
  b.   clusters  
  c.   dust  
  d.   gases  
  Hint    
      
  7.What does CME stand for?  
  a.   Coronal Mass Ejections  
  b.   Coronal Materials Ejections  
  c.   Coronal Mass Emissions  
  d.   Central Mass Ejections  
  Hint    
      
  8.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Sirius  
  b.   Polaris  
  c.   Orion  
  d.   Betelgeuse  
  Hint    
      
  9.An aurora, like the aurora borealis is caused by  
  a.   solar flares  
  b.   CME's  
  c.   solarwind  
  d.   particles from solar flares  
  Hint    
      
  10.When a star becomes a supernova its brightness __________.  
  a.   doesn't change  
  b.   decreases  
  c.   vanishes  
  d.   increases  
  Hint    
      
  11.Energy produced by the sun reaches the Earth through _________.  
  a.   radiation  
  b.   convection and radiation  
  c.   conduction  
  d.   convection  
  Hint    
      
  12.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent magnitude  
  b.   apparent strength  
  c.   absolute solitude  
  d.   absolute magnitude  
  Hint    
      
  13.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   Earth's magnetic field  
  b.   the Sun's rotation  
  c.   the rotation of the galaxy  
  d.   the magnetic field associated with sunspots  
  Hint    
      
  14.Which, if any, of the three types of galaxies occur the most often?  
  a.   elliptical  
  b.   spiral  
  c.   They occur in equal amounts.  
  d.   irregular  
  Hint    
      
  15.A binary system is composed of ___________ stars.  
  a.   three  
  b.   five  
  c.   two  
  d.   four  
  Hint    
      
  16.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, oxygen  
  b.   hydrogen, oxygen  
  c.   carbon, helium  
  d.   hydrogen, helium  
  Hint    
      
  17.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   forces  
  b.   inertia  
  c.   friction  
  d.   gravity  
  Hint    
      
  18.Our sun is considered a star of__________ temperature.  
  a.   medium  
  b.   low  
  c.   cool  
  d.   hot  
  Hint    
      
  19.Why are circumpolar constellations visible all year long?  
  a.   because they are located directly above the North Pole  
  b.   because they are the brightest stars  
  c.   because they are the closest  
  d.   All constellations are visible all year long.  
  Hint    
      
  20.When fusion occurs, the mass lost is converted into __________.  
  a.   energy  
  b.   mass  
  c.   liquid  
  d.   matter  
  Hint    

 
   
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