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Quizzes Quiz
Stars and Galaxies

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

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