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Stars and Galaxies

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

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