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Atmosphere

Practice Test
      
  1.What preceded the growth and survival of green plants on Earth?  
  a.   human life  
  b.   the formation of severe weather  
  c.   the formation of an ozone layer  
  d.   the formation of the solar system  
  Hint    
      
  2.How do CFCs destroy ozone?  
  a.   A CFC combines with a three-atom oxygen molecule.  
  b.   A chlorine atom from a CFC combines with two oxygen atoms from ozone and leaves an oxygen atom.  
  c.   A carbon atom from a CFC combines with one oxygen from ozone and leaves a two-atom oxygen molecule.  
  d.   A chlorine atom from a CFC combines with one oxygen from ozone and leaves a two- atom oxygen molecule.  
  Hint    
      
  3.What two forms of heat transfer help create a sea breeze?  
  a.   convection and radiation  
  b.   radiation and conduction  
  c.   radiation and recycling  
  d.   convection and conduction  
  Hint    
      
  4.Why are there fewer molecules of air up in the mountains?  
  a.   because air is too heavy  
  b.   because air pressure increases as you go higher  
  c.   because air pressure decreases as you go higher  
  d.   because air pressure is the same throughout all layers of the atmosphere  
  Hint    
      
  5.Where can CFCs be found?  
  a.   refrigerators  
  b.   all answers are correct  
  c.   aerosol sprays  
  d.   air conditioners  
  Hint    
      
  6.How does the atmosphere benefit Earth?  
  a.   It protects Earth from the Sun's harmful rays.  
  b.   It protects Earth from cold air.  
  c.   It protects Earth from other planets.  
  d.   It creates water.  
  Hint    
      
  7.What's the difference between ozone and the oxygen you breath?  
  a.   Ozone is made of two atoms of oxygen and the oxygen you breath is made of three.  
  b.   One is in gas form and the other is in liquid form.  
  c.   They're made of totally different atoms.  
  d.   Ozone is made of three atoms of oxygen, and the oxygen you breathe is made of two.  
  Hint    
      
  8.Within which layer of the atmosphere do you find rain, snow, and clouds?  
  a.   mesosphere  
  b.   troposphere  
  c.   thermosphere  
  d.   stratosphere  
  Hint    
      
  9.Which layer of the atmosphere contains the ozone layer?  
  a.   thermosphere  
  b.   troposphere  
  c.   exosphere  
  d.   stratosphere  
  Hint    
      
  10.What is the outermost layer of the atmosphere called?  
  a.   mesosphere  
  b.   exosphere  
  c.   thermosphere  
  d.   stratosphere  
  Hint    
      
  11.What have CFCs done to Earth and its atmosphere?  
  a.   They have caused more ultraviolet radiation to reach Earth.  
  b.   They have caused the number of cancer cases to rise.  
  c.   They have created a hole in the ozone layer.  
  d.   all answers are correct  
  Hint    
      
  12.What is it called when water changes from gas to liquid?  
  a.   condensation  
  b.   freezing  
  c.   evaporation  
  d.   melting  
  Hint    
      
  13.Conduction is the transfer of heat through __________.  
  a.   empty space  
  b.   radiation  
  c.   thoughts  
  d.   touch  
  Hint    
      
  14.Why are the thermosphere and exosphere the warmest of the atmospheric layers?  
  a.   because the air pressure is too great  
  b.   because they are closest to the Sun  
  c.   because the underlying mesosphere keeps the warm air there  
  d.   because of the gases trapped in these layers  
  Hint    
      
  15.What is the most abundant gas in Earth's atmosphere?  
  a.   oxygen  
  b.   nitrogen  
  c.   hydrogen  
  d.   carbon  
  Hint    
      
  16.What would happen if Earth had no atmosphere?  
  a.   Earth would not have nights.  
  b.   The days would be cold and the nights would be hot.  
  c.   The days would be hot and the nights would be cold.  
  d.   Earth would not have days.  
  Hint    
      
  17.The hydrosphere, which consists of all of Earth's water, is maintained __________.  
  a.   by the clouds in the atmosphere  
  b.   by addition of water to the atmosphere  
  c.   by recycling water in the atmosphere  
  d.   by removing water from the atmosphere  
  Hint    
      
  18.How have humans altered the composition of Earth's atmosphere?  
  a.   They have polluted it with excess ozone.  
  b.   They have made the atmospheric pressure drop.  
  c.   They have polluted it with carbon dioxide gas.  
  d.   They have made the atmospheric temperature drop.  
  Hint    
      
  19.What form of energy transfer heats Earth?  
  a.   recycling  
  b.   radiation  
  c.   conduction  
  d.   convention  
  Hint    
      
  20.Force exerted on an area is called __________.  
  a.   pressure  
  b.   temperature  
  c.   gravity  
  d.   mass  
  Hint    

 
   
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