WEBVTT

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Sound and vibrations.

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Hello friends!

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Today we will learn how sounds are made by vibrations.

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Let's listen to our world.

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It looks quiet, but watch carefully.

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Now let's try it ourselves.

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Tap.

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Did you hear that?

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The object is moving.

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This movement is called vibration.

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When vibration starts, sound starts.

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When vibration stops, sound stops.

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Now make a sound.

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Touch your throat.

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It is moving.

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That is vibration.

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Look at the frog.

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Its throat moves and makes sound.

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Look at the bee.

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Its wings vibrate and make a buzz.

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Big or small, fast or slow.

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All sounds are made by vibration.