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Stars and Galaxies

Practice Test
  1.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute magnitude  
  b.   apparent magnitude  
  c.   apparent measure  
  d.   absolute measure  
  2.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   apparent magnitude  
  b.   apparent strength  
  c.   absolute magnitude  
  d.   absolute solitude  
  3.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a supernova  
  b.   a giant  
  c.   a galaxy  
  d.   a white dwarf  
  4.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Betelgeuse  
  b.   Polaris  
  c.   Sirius  
  d.   Orion  
  5.Another way to define "nebula" is __________.  
  a.   young star  
  b.   old star  
  c.   dying star  
  d.   exploding star  
  6.When fusion occurs, the mass lost is converted into __________.  
  a.   energy  
  b.   liquid  
  c.   matter  
  d.   mass  
  7.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   friction  
  b.   gravity  
  c.   inertia  
  d.   forces  
  8.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   elements  
  b.   dust  
  c.   gases  
  d.   clusters  
  9.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.  
  10.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   size  
  b.   parallel  
  c.   parallax  
  d.   brightness  
  11.Which, if any, of the three types of galaxies occur the most often?  
  a.   elliptical  
  b.   They occur in equal amounts.  
  c.   spiral  
  d.   irregular  
  12.What does CME stand for?  
  a.   Central Mass Ejections  
  b.   Coronal Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Emissions  
  13.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  
  14.When a star becomes a supernova its brightness __________.  
  a.   vanishes  
  b.   doesn't change  
  c.   increases  
  d.   decreases  
  15.A binary system is composed of ___________ stars.  
  a.   five  
  b.   two  
  c.   three  
  d.   four  
  16.Energy produced by the sun reaches the Earth through _________.  
  a.   convection  
  b.   conduction  
  c.   convection and radiation  
  d.   radiation  
  17.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Fusion  
  c.   Parallax  
  d.   Blue shift  
  18.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 closest  
  d.   because they are the brightest stars  
  19.Our sun is considered a star of__________ temperature.  
  a.   medium  
  b.   cool  
  c.   low  
  d.   hot  
  20.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their age  
  b.   their weight  
  c.   their temperature  
  d.   gravity  

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