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Stars and Galaxies

Practice Test
      
  1.Why are circumpolar constellations visible all year long?  
  a.   because they are the brightest stars  
  b.   because they are the closest  
  c.   because they are located directly above the North Pole  
  d.   All constellations are visible all year long.  
  Hint    
      
  2.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   friction  
  b.   forces  
  c.   inertia  
  d.   gravity  
  Hint    
      
  3.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    
      
  4.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   parallel  
  b.   size  
  c.   parallax  
  d.   brightness  
  Hint    
      
  5.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, oxygen  
  b.   carbon, oxygen  
  c.   hydrogen, helium  
  d.   carbon, helium  
  Hint    
      
  6.An aurora, like the aurora borealis is caused by  
  a.   solar flares  
  b.   particles from solar flares  
  c.   CME's  
  d.   solarwind  
  Hint    
      
  7.__________ is the process that creates energy in the sun.  
  a.   Parallax  
  b.   Fusion  
  c.   Fission  
  d.   Blue shift  
  Hint    
      
  8.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the universe  
  b.   the solar system  
  c.   It doesn't orbit.  
  d.   the Milky Way  
  Hint    
      
  9.A binary system is composed of ___________ stars.  
  a.   three  
  b.   five  
  c.   four  
  d.   two  
  Hint    
      
  10.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their temperature  
  b.   their weight  
  c.   their age  
  d.   gravity  
  Hint    
      
  11.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   elements  
  b.   dust  
  c.   gases  
  d.   clusters  
  Hint    
      
  12.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    
      
  13.Circumpolar constellations __________.  
  a.   appear to circle around the North Star as the Earth rotates.  
  b.   never appear around the North Pole.  
  c.   are always located above the North Pole.  
  d.   are located in a circular constellation.  
  Hint    
      
  14.Another way to define "nebula" is __________.  
  a.   dying star  
  b.   young star  
  c.   old star  
  d.   exploding star  
  Hint    
      
  15.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   surface  
  b.   photosphere  
  c.   corona  
  d.   chromosphere  
  Hint    
      
  16.Our sun is considered a star of__________ temperature.  
  a.   cool  
  b.   medium  
  c.   low  
  d.   hot  
  Hint    
      
  17.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent strength  
  b.   apparent magnitude  
  c.   absolute magnitude  
  d.   absolute solitude  
  Hint    
      
  18.When fusion occurs, the mass lost is converted into __________.  
  a.   mass  
  b.   energy  
  c.   liquid  
  d.   matter  
  Hint    
      
  19.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the Sun's rotation  
  b.   the magnetic field associated with sunspots  
  c.   the rotation of the galaxy  
  d.   Earth's magnetic field  
  Hint    
      
  20.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Polaris  
  b.   Sirius  
  c.   Betelgeuse  
  d.   Orion  
  Hint    

 
   
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