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Page 1: 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

By: Monica Harris

Page 2: 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

•Sound is a mechanical wave

Page 3: 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

Sound is made when a material vibrates

Sound waves are created by the movement of particles in a medium

Page 4: 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.

http://illuminations.nctm.org/LessonDetail.aspx?ID=L489

Filamentality site – Click hyperlink for instructions to construct string telephone.

http://www.kn.att.com/wired/fil/pages/listsoundenmo.html

Students will do experiment with string telephone.

Construct graph to show results of string telephone experiment.

Page 5: 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

Page 6: 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

•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

Page 7: 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

Pet manipulative – measurement of liquid for first experiment.

Experiment 1Equipment 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 2Rope experiment to discover transverse waves.Students will do Graphic Organizer assignmenton waves and frequency.

Experiment 3Siren experiment to discover Doppler effect.

Page 8: 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

Page 9: 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

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.

Page 10: 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

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.http://www.kn.att.com/wired/fil/pages/listsoundenmo.html 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 http://www.youtube.com/watch?v=zhR9bdHibKQ

Page 11: 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

Page 12: 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

Different sounds produce different waves

Flute

Clarinet Violin

Trumpet

Page 13: 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

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.

Lecture 21 Sound →Fluids. Standing Waves I A string is clamped at both ends and plucked so it vibrates in a standing mode between two extreme positions

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Like all waves, sound waves are produced by a vibration. A tuning fork vibrates to produce a sound. A guitar string vibrates to produce a sound