SOUND S4P2: Students will demonstrate how sound is produced by vibrating objects and how sound can be varied by changing the rate of vibration.

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Presentation transcript:

SOUND S4P2: Students will demonstrate how sound is produced by vibrating objects and how sound can be varied by changing the rate of vibration.

Sound is an energy that moves in waves and travels in all directions.

Vibrations Sound is caused by:

Sound is made when air particles:

Sound is like light: It travels in waves.

amplitude How loud or soft a sound is called its

Essential Question: How can sounds be made? What is pitch?

Pitch is how high or how low an object makes a sound.

Frequency Pitch is determined by the frequency of a sound wave.

Decibels Sound is measured in decibels. A normal conversation should be about 60 decibels. Anything above 120 decibels will harm your eardrum. The greater the decibels-the greater the amplitude.

Your Ear Outer ear- The sound waves enter into your outer ear. Middle ear-The sound waves vibrate your eardrum. Inner Ear-The vibrations travel to your brain.

Making Sound A piano can play a wide range of notes because a piano has different strings which produces different _____.

Sound When strings on a guitar are plucked, air particles _______ and make sound.