Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
Stars and Galaxies

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

McGraw-Hill / Glencoe
The McGraw-Hill Companies