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Quizzes Quiz
Stars and Galaxies

Practice Test
  1.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   elements  
  c.   gases  
  d.   dust  
  2.Particles that escape from the sun's __________ move through space as solar wind.  
  a.   photosphere  
  b.   surface  
  c.   chromosphere  
  d.   corona  
  3.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute measure  
  b.   apparent measure  
  c.   absolute magnitude  
  d.   apparent magnitude  
  4.An aurora, like the aurora borealis is caused by  
  a.   solarwind  
  b.   solar flares  
  c.   particles from solar flares  
  d.   CME's  
  5.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 universe  
  d.   the Milky Way  
  6.Another way to define "nebula" is __________.  
  a.   exploding star  
  b.   old star  
  c.   young star  
  d.   dying star  
  7.What holds planets, stars, gas, and dust together in a galaxy?  
  a.   gravity  
  b.   friction  
  c.   inertia  
  d.   forces  
  8.Which, if any, of the three types of galaxies occur the most often?  
  a.   elliptical  
  b.   spiral  
  c.   They occur in equal amounts.  
  d.   irregular  
  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 galaxy  
  c.   a supernova  
  d.   a giant  
  10.Energy produced by the sun reaches the Earth through _________.  
  a.   conduction  
  b.   radiation  
  c.   convection and radiation  
  d.   convection  
  11.When fusion occurs, the mass lost is converted into __________.  
  a.   mass  
  b.   liquid  
  c.   energy  
  d.   matter  
  12.__________ is the process that creates energy in the sun.  
  a.   Fission  
  b.   Parallax  
  c.   Fusion  
  d.   Blue shift  
  13.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   their weight  
  b.   gravity  
  c.   their temperature  
  d.   their age  
  14.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  
  15.What does CME stand for?  
  a.   Coronal Mass Ejections  
  b.   Central Mass Ejections  
  c.   Coronal Mass Emissions  
  d.   Coronal Materials Ejections  
  16.A binary system is composed of ___________ stars.  
  a.   five  
  b.   three  
  c.   two  
  d.   four  
  17.When a star becomes a supernova its brightness __________.  
  a.   increases  
  b.   doesn't change  
  c.   decreases  
  d.   vanishes  
  18.Circumpolar constellations __________.  
  a.   appear to circle around the North Star as the Earth rotates.  
  b.   are located in a circular constellation.  
  c.   never appear around the North Pole.  
  d.   are always located above the North Pole.  
  19.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  
  20.Our sun is considered a star of__________ temperature.  
  a.   hot  
  b.   low  
  c.   medium  
  d.   cool  

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