Musical springs

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1. READ/play the text
2. CLICK the picture (and video)
3. TRY this:

Q1: What do the elastic band and the guitar have in common?

[Answer]

If you make a springy material go back and forward very fast, it will make a sound.

Violins, guitars and drums all use the springiness of materials to make a sound.

The kind of sound made depends on the length of the spring (for example on the length of the guitar string).