P128 - Light bulb brightness
An activity where children systematically add batteries to a circuit to see how it affects brightness.
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P127 - How changing the voltage affects the volume of a buzzer
An activity where children systematically add batteries to a circuit to see how it affects sound.
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P217 - How does distance affect the volume of sound?
An activity where children systematically increase the distance from a sound source to see how it affects volume.
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