Changing Pitch by Changing Tension

Explore pitch and tension using a pegboard and string.
Tie one end of the string to a hole at one end of a pegboard.
Place one washer on the eyebolt and run the eyebolt through a hole at the other end of the pegboard.
Secure the end of the eyebolt on the underside of the pegboard with another washer and a wing nut.
Tie the loose end of the string to the eyebolt. Turn the eyebolt to tighten or loosen the string.
How many pitches can you make?
When you turned the eyebolt, what happened to the string?
What happened to the pitch when you tightened the string?
Do you know anyone who plays a stringed instrument? Ask that person to demonstrate for you or your class how the strings on the instrument are tuned.
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