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Quizzes Quiz
Stars and Galaxies

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

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