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Quizzes Quiz
Stars and Galaxies

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

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