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Quizzes Quiz
Stars and Galaxies

Practice Test
  1.Which, if any, of the three types of galaxies occur the most often?  
  a.   They occur in equal amounts.  
  b.   irregular  
  c.   elliptical  
  d.   spiral  
  2.The __________ __________of a star is a measure of the amount of light it gives off.  
  a.   absolute magnitude  
  b.   apparent magnitude  
  c.   apparent strength  
  d.   absolute solitude  
  3.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   gases  
  b.   dust  
  c.   clusters  
  d.   elements  
  4.An aurora, like the aurora borealis is caused by  
  a.   solarwind  
  b.   particles from solar flares  
  c.   solar flares  
  d.   CME's  
  5.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   size  
  b.   brightness  
  c.   parallel  
  d.   parallax  
  6.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   It doesn't orbit.  
  b.   the solar system  
  c.   the universe  
  d.   the Milky Way  
  7.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, oxygen  
  b.   carbon, oxygen  
  c.   carbon, helium  
  d.   hydrogen, helium  
  8.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   friction  
  b.   gravity  
  c.   forces  
  d.   inertia  
  9.Once stars run out of hydrogen and the temperature begins to increase, these stars are said to be __________.  
  a.   a white dwarf  
  b.   a giant  
  c.   a supernova  
  d.   a galaxy  
  10.Why are circumpolar constellations visible all year long?  
  a.   because they are the brightest stars  
  b.   because they are the closest  
  c.   All constellations are visible all year long.  
  d.   because they are located directly above the North Pole  
  11.A binary system is composed of ___________ stars.  
  a.   four  
  b.   two  
  c.   three  
  d.   five  
  12.What does CME stand for?  
  a.   Coronal Mass Emissions  
  b.   Central Mass Ejections  
  c.   Coronal Materials Ejections  
  d.   Coronal Mass Ejections  
  13.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   corona  
  b.   chromosphere  
  c.   surface  
  d.   photosphere  
  14.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Polaris  
  b.   Sirius  
  c.   Orion  
  d.   Betelgeuse  
  15.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  
  16.Prominence, or huge arching columns of gas, are thought to be caused by__________.  
  a.   Earth's magnetic field  
  b.   the rotation of the galaxy  
  c.   the Sun's rotation  
  d.   the magnetic field associated with sunspots  
  17.Circumpolar constellations __________.  
  a.   are located in a circular constellation.  
  b.   appear to circle around the North Star as the Earth rotates.  
  c.   never appear around the North Pole.  
  d.   are always located above the North Pole.  
  18.Our sun is considered a star of__________ temperature.  
  a.   hot  
  b.   medium  
  c.   low  
  d.   cool  
  19.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Blue shift  
  c.   Parallax  
  d.   Fusion  
  20.Another way to define "nebula" is __________.  
  a.   young star  
  b.   old star  
  c.   dying star  
  d.   exploding star  

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