Sound in 2nd Class

Sound is an energy, caused by vibrations that makes sound waves.

We completed a dancing rice experiment to see sound vibrations. We made ‘String telephones’ to hear sound waves.

We investigated which material would be the best sound insulator. We measured how far away from the sound we needed to walk before the sound disappeared when blocked by each material. We predicted that the cardboard box would be the best sound insulator and we were right!

Some materials allow sound to pass through them easily. Other materials absorb sound.

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