GOALS   |   BACKGROUND   |   SOLs   |   DEMOS   |   INTERACTIVE   |   EXAMPLES   |   RESOURCES


Return to Topics List
 

TITLE:  Properties of Sound
Presented to grade level 5
 

GOALS
Properties of Sound is designed to teach the various characteristics of sound (frequency, pitch, loudness, wavelength, and period), show how sound travels, provide visual aids to learning about sound, and provide interesting examples of sound detection in the natural world.
Return to top of page
 

SPECIFIC OBJECTIVES

Return to top of page
 

BACKGROUND
Return to top of page
 

SOLs COVERED
SOL 5.6 The students will demonstrate the ability of sound to travel through solids, liquids, and gasses and be able to describe the wave nature of sound.
Return to top of page
 

DEMONSTRATIONS AND EXHIBITS
Materials needed:  12" ruler, guitar or other stringed instrument, slinky

1. Show students that sound is caused by vibrations. (Also see interactive exercise.)

2. Show different properties of sound waves.
  • Show compression and rarefaction in longitudinal waves with a slinky.
  • Explain that waves need to bounce off of molecules to move so molecules that are closer together will make a wave move more quickly. Therefore, sound will move fastest through solids, slowest through gasses, and at an intermediate speed through liquids. (Also see interactive exercises.)
  • Show an overhead of a sound wave and explain what the terms wavelength, period, and frequency represent on the wave.
  • Graphically show on an overhead what differences in amplitude and pitch would look like.
  • Relate the above terms to each other. For example, a high pitch is indicative of a high frequency and a long period.
  • Return to top of page
     

    INTERACTIVE EXERCISES
    Materials needed:  plastic cup, rubber band, coat hanger, string

    1. Sound waves vibrate.

    2. Sound travels faster through solids than through liquids or gasses. 3. Review Sheet.
     Return to top of page
     

    INTERESTING EXAMPLES
    SONAR and Echolocation are examples of specialized sound detection systems.

     Return to top of page
     

    OTHER RESOURCES
     
    Literature VanCleave, Janice.  1991.  Physics for Every Kid.  John Wiley and Sons, NY.
    Local Places to Visit
    Related Web Sites The Soundry (ThinkQuest '98)
     Return to top of page

    Return to Topics List



    Site author:  Andrew Wozniak
    Site maintained by lmj8a@virginia.edu
    last updated: March 10, 2000
    http://faculty.virginia.edu/teach-present-bio/