Section 15.1 Properties and Detection of Sound

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

 
   
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