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Quizzes Quiz
Stars and Galaxies

Practice Test
  1.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Polaris  
  b.   Betelgeuse  
  c.   Orion  
  d.   Sirius  
  2.Which, if any, of the three types of galaxies occur the most often?  
  a.   spiral  
  b.   irregular  
  c.   elliptical  
  d.   They occur in equal amounts.  
  3.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a giant  
  b.   a galaxy  
  c.   a white dwarf  
  d.   a supernova  
  4.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   brightness  
  b.   parallax  
  c.   parallel  
  d.   size  
  5.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Fusion  
  c.   Parallax  
  d.   Blue shift  
  6.Another way to define "nebula" is __________.  
  a.   old star  
  b.   young star  
  c.   exploding star  
  d.   dying star  
  7.Our sun is considered a star of__________ temperature.  
  a.   medium  
  b.   hot  
  c.   low  
  d.   cool  
  8.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   gases  
  c.   elements  
  d.   dust  
  9.When fusion occurs, the mass lost is converted into __________.  
  a.   liquid  
  b.   mass  
  c.   matter  
  d.   energy  
  10.Circumpolar constellations __________.  
  a.   are located in a circular constellation.  
  b.   appear to circle around the North Star as the Earth rotates.  
  c.   are always located above the North Pole.  
  d.   never appear around the North Pole.  
  11.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   surface  
  b.   photosphere  
  c.   chromosphere  
  d.   corona  
  12.A binary system is composed of ___________ stars.  
  a.   four  
  b.   five  
  c.   two  
  d.   three  
  13.The __________ __________ is a measure of the amount of light received on earth.  
  a.   apparent magnitude  
  b.   absolute magnitude  
  c.   absolute measure  
  d.   apparent measure  
  14.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   hydrogen, oxygen  
  c.   carbon, helium  
  d.   carbon, oxygen  
  15.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  
  16.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   inertia  
  b.   forces  
  c.   gravity  
  d.   friction  
  17.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Central Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Ejections  
  18.Why are circumpolar constellations visible all year long?  
  a.   because they are the closest  
  b.   because they are the brightest stars  
  c.   All constellations are visible all year long.  
  d.   because they are located directly above the North Pole  
  19.An aurora, like the aurora borealis is caused by  
  a.   CME's  
  b.   solarwind  
  c.   particles from solar flares  
  d.   solar flares  
  20.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   Earth's magnetic field  
  b.   the magnetic field associated with sunspots  
  c.   the Sun's rotation  
  d.   the rotation of the galaxy  

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