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Stars and Galaxies

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

 
   
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