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  
  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  
  3.Sound cannot travel through __________.  
  a.   a vacuum  
  b.   water  
  c.   steel  
  d.   gas  
  4.The __________ of sound waves measures loudness.  
  a.   frequency  
  b.   speed  
  c.   amplitude  
  d.   period  
  5.The speed of sound in air changes depending on __________.  
  a.   wind  
  b.   volume  
  c.   temperature  
  d.   pressure  
  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  
  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  
  8.What type of wave is sound?  
  a.   compressional  
  b.   surface  
  c.   transverse  
  d.   electromagnetic  
  9.The frequency of a sound determines its __________.  
  a.   pitch  
  b.   timbre  
  c.   speed  
  d.   loudness  
  10.Decibels measure changes in __________.  
  a.   pressure  
  b.   frequency  
  c.   temperature  
  d.   wavelength  
  11.During the Doppler shift, approaching sound waves __________.  
  a.   shorten  
  b.   gain amplitude  
  c.   decrease frequency  
  d.   lengthen  
  12.What is the logarithmic scale that measures sound level?  
  a.   pressure  
  b.   electromagnetic spectrum  
  c.   frequency  
  d.   decibel  

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