Sound Through a Medium: Wobbling Bubbles

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Sound Through a Medium: Wobbling Bubbles

Teachers TV
Teachers TV

페이스북 트위터 카카오톡 네이버밴드 링크복사

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교육학 >교육일반 >기타
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2017.04.25

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789

This short clip is ideal for use as a lesson starter in KS3/4 science and features a demonstration of how sound needs a medium to pass through. The presenter attaches a sound generator to a loudspeaker. He holds a bubble in front of the speaker, and turns the volume down and up. At low volume, the bubble moves slowly. At high volume, the bubble wobbles a lot. The question for students to answer is: What makes the bubble move? See the accompanying teachers' notes for a full explanation of the science underpinning the demonstration, plus suggested extension activities.

Video Series: Lesson Starters
Release Date 2009