Section 15.1 Properties and Detection of Sound

Practice Test
      
  1.Sound waves, like other waves, __________.  
  a.   refract through a hard surface  
  b.   diffuse upon striking a hard surface  
  c.   are absorbed by a hard surface  
  d.   reflect off a hard surface  
  Hint    
      
  2.What is a sound wave?  
  a.   a radio wave  
  b.   a pressure variation transmitted through matter  
  c.   a surface wave  
  d.   fluctuations in electromagnetic energy  
  Hint    
      
  3.Sound cannot travel through __________.  
  a.   a vacuum  
  b.   water  
  c.   steel  
  d.   gas  
  Hint    
      
  4.The __________ of sound waves measures loudness.  
  a.   frequency  
  b.   speed  
  c.   amplitude  
  d.   period  
  Hint    
      
  5.The speed of sound in air changes depending on __________.  
  a.   wind  
  b.   volume  
  c.   temperature  
  d.   pressure  
  Hint    
      
  6.Long-term exposure to loud sounds can __________.  
  a.   increase high-frequency hearing  
  b.   decrease high-frequency hearing  
  c.   increase low-frequency hearing  
  d.   decrease low-frequency hearing  
  Hint    
      
  7.When a train passes and its whistle sounds like it changes pitch, the cause is __________.  
  a.   the Galileo Effect  
  b.   the Doppler Effect  
  c.   the Big Bang  
  d.   speed change  
  Hint    
      
  8.What type of wave is sound?  
  a.   compressional  
  b.   surface  
  c.   transverse  
  d.   electromagnetic  
  Hint    
      
  9.The frequency of a sound determines its __________.  
  a.   pitch  
  b.   timbre  
  c.   speed  
  d.   loudness  
  Hint    
      
  10.Decibels measure changes in __________.  
  a.   pressure  
  b.   frequency  
  c.   temperature  
  d.   wavelength  
  Hint    
      
  11.During the Doppler shift, approaching sound waves __________.  
  a.   shorten  
  b.   gain amplitude  
  c.   decrease frequency  
  d.   lengthen  
  Hint    
      
  12.What is the logarithmic scale that measures sound level?  
  a.   pressure  
  b.   electromagnetic spectrum  
  c.   frequency  
  d.   decibel  
  Hint    

 
   
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