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Stars and Galaxies

Practice Test
  1.Fusion occurs when __________ and __________ combine to make energy.  
  a.   hydrogen, helium  
  b.   hydrogen, oxygen  
  c.   carbon, oxygen  
  d.   carbon, helium  
  2.Which, if any, of the three types of galaxies occur the most often?  
  a.   spiral  
  b.   They occur in equal amounts.  
  c.   elliptical  
  d.   irregular  
  3.Energy produced by the sun reaches the Earth through _________.  
  a.   conduction  
  b.   convection and radiation  
  c.   radiation  
  d.   convection  
  4.Circumpolar constellations __________.  
  a.   never appear around the North Pole.  
  b.   are always located above the North Pole.  
  c.   are located in a circular constellation.  
  d.   appear to circle around the North Star as the Earth rotates.  
  5.When stars are located closer to one another, their attraction to one another increases due to __________.  
  a.   gravity  
  b.   their weight  
  c.   their temperature  
  d.   their age  
  6.Our sun is considered a star of__________ temperature.  
  a.   cool  
  b.   hot  
  c.   low  
  d.   medium  
  7.Astronomers use a star's __________ to determine how far it is from Earth.  
  a.   size  
  b.   parallel  
  c.   brightness  
  d.   parallax  
  8.When fusion occurs, the mass lost is converted into __________.  
  a.   energy  
  b.   liquid  
  c.   matter  
  d.   mass  
  9.The __________ __________ is a measure of the amount of light received on earth.  
  a.   absolute measure  
  b.   apparent magnitude  
  c.   absolute magnitude  
  d.   apparent measure  
  10.By studying a star's spectra, scientists can determine __________ found in the star's atmosphere.  
  a.   clusters  
  b.   elements  
  c.   gases  
  d.   dust  
  11.When a star becomes a supernova its brightness __________.  
  a.   increases  
  b.   vanishes  
  c.   decreases  
  d.   doesn't change  
  12.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  
  13.Why are circumpolar constellations visible all year long?  
  a.   because they are the closest  
  b.   because they are located directly above the North Pole  
  c.   All constellations are visible all year long.  
  d.   because they are the brightest stars  
  14.A binary system is composed of ___________ stars.  
  a.   five  
  b.   four  
  c.   two  
  d.   three  
  15.An aurora, like the aurora borealis is caused by  
  a.   solarwind  
  b.   CME's  
  c.   solar flares  
  d.   particles from solar flares  
  16.The Moon orbits Earth and Earth orbits the Sun. What does the Sun orbit?  
  a.   the universe  
  b.   It doesn't orbit.  
  c.   the solar system  
  d.   the Milky Way  
  17.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  
  18.What does CME stand for?  
  a.   Coronal Materials Ejections  
  b.   Coronal Mass Ejections  
  c.   Coronal Mass Emissions  
  d.   Central Mass Ejections  
  19.Another way to define "nebula" is __________.  
  a.   old star  
  b.   young star  
  c.   exploding star  
  d.   dying star  
  20.The North Star,___________, is positioned almost directly over the North Pole.  
  a.   Betelgeuse  
  b.   Orion  
  c.   Polaris  
  d.   Sirius  

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