By: Monica Harris Sound is a mechanical wave Sound is made when a material vibrates Sound waves are created by the movement of particles in a medium.

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A sound is a wave and frequency determines pitch

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Presentation transcript:

By: Monica Harris

Sound is a mechanical wave

Sound is made when a material vibrates Sound waves are created by the movement of particles in a medium

Vibrations - The Bump Interactive applet to show sound waves. Filamentality site – Click hyperlink for instructions to construct string telephone. Students will do experiment with string telephone. Construct graph to show results of string telephone experiment.

Mechanical waves need a medium to travel through. Example of the mediums are: solid, liquid or gas. Sound cannot travel in a vacuum. No sound in space

Pet manipulative – measurement of liquid for first experiment. Experiment 1 Equipment used – ½ quart measuring cup (students will use to put 2 gallons of water into pan) and pan. Purpose – Students will figure out how many ½ quarts equals 2 gallons. -- Students will observe wavelength after throwing stone into water. Experiment 2 Rope experiment to discover transverse waves. Students will do Graphic Organizer assignment on waves and frequency. Experiment 3 Siren experiment to discover Doppler effect.

THE HUMAN EAR Divided into three major regions:  Outer Ear  Visible portion of ear captures sound.  Middle Ear  Contains eardrum, hammer, anvil, and stirrup.  Transfers sound from outer to inner ear.  Inner Ear  Contains Cochlea and auditory nerve, which leads to brain.

 Pet manipulative – Classification sorting.  Students will do experiment using ear plugs to experience the difference between hearing and hearing loss.  Students will go to filamentality site and click appropriate links for hearing and hearing loss.  Student will write short essay on “Causes of Hearing Loss”.  Student given objects to sort in believed decibel level.  Students given handout with objects and their decibel levels.  Construct bar graph to show decibel levels of objects (from handout).  Students listen to overview of Sound Energy on YouTube 

Different sounds produce different waves Flute Clarinet Violin Trumpet

Sound waves travel at 768 miles per hour. Fast vibrations make a high sound while slow vibrations make a low sound. Some animals hear things we cannot hear. Thunder is one of nature’s loudest sounds.