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Sound Dampeners
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In this activity, learners will experiment with water- and air-filled balloons as a way of dampening sound before it reaches their ears.
Decibel Cannon
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In this activity, learners will construct an air cannon as a model for the human ear.
Cartesian Diver
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In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.