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Quizzes Quiz
Stars and Galaxies

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

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