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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.   Orion  
  c.   Sirius  
  d.   Betelgeuse  
  2.A binary system is composed of ___________ stars.  
  a.   two  
  b.   four  
  c.   five  
  d.   three  
  3.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   the Sun's rotation  
  b.   the rotation of the galaxy  
  c.   the magnetic field associated with sunspots  
  d.   Earth's magnetic field  
  4.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the solar system  
  b.   It doesn't orbit.  
  c.   the Milky Way  
  d.   the universe  
  5.Our sun is considered a star of__________ temperature.  
  a.   cool  
  b.   low  
  c.   medium  
  d.   hot  
  6.__________ is the process that creates energy in the sun.  
  a.   Blue shift  
  b.   Fission  
  c.   Fusion  
  d.   Parallax  
  7.Energy produced by the sun reaches the Earth through _________.  
  a.   convection  
  b.   conduction  
  c.   radiation  
  d.   convection and radiation  
  8.Circumpolar constellations __________.  
  a.   are always located above the North Pole.  
  b.   never appear around the North Pole.  
  c.   appear to circle around the North Star as the Earth rotates.  
  d.   are located in a circular constellation.  
  9.Fusion occurs when __________ and __________ combine to make energy.  
  a.   carbon, oxygen  
  b.   hydrogen, oxygen  
  c.   carbon, helium  
  d.   hydrogen, helium  
  10.When fusion occurs, the mass lost is converted into __________.  
  a.   mass  
  b.   matter  
  c.   energy  
  d.   liquid  
  11.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   gravity  
  b.   their age  
  c.   their temperature  
  d.   their weight  
  12.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   inertia  
  b.   gravity  
  c.   friction  
  d.   forces  
  13.Another way to define "nebula" is __________.  
  a.   old star  
  b.   exploding star  
  c.   young star  
  d.   dying star  
  14.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   elements  
  b.   clusters  
  c.   gases  
  d.   dust  
  15.An aurora, like the aurora borealis is caused by  
  a.   solar flares  
  b.   CME's  
  c.   particles from solar flares  
  d.   solarwind  
  16.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   photosphere  
  b.   corona  
  c.   chromosphere  
  d.   surface  
  17.When a star becomes a supernova its brightness __________.  
  a.   decreases  
  b.   vanishes  
  c.   increases  
  d.   doesn't change  
  18.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Coronal Materials Ejections  
  c.   Central Mass Ejections  
  d.   Coronal Mass Ejections  
  19.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  
  20.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute magnitude  
  b.   absolute measure  
  c.   apparent magnitude  
  d.   apparent measure  

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