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Flvs Chemistry 3.06

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Wave properties:
Frequency: How many waves go past a point in one second; measured in hertz (Hz). The higher the frequency, the more energy in the wave.
1 Ask the children to play 'verbal tennis' in partners on words that describe sounds (eg loud, quiet, vibration, pitch). One child says one word related to sound, then their partner says another and so on.
2 Ask the children what things make sounds. Lead them to point out that sound is made when there is a vibration.
3 Explain that the frequency of a sound is a measure of the number of vibrations or waves per second.
4 Explain that a sound with a high frequency will make a high-pitched sound, and one with a low frequency will make a low-pitched sound.
5 Explain that pitch is a measure of how

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