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Quizzes Quiz
Stars and Galaxies

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

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