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Stars and Galaxies

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

 
   
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