Last week, he came home with the directions: The student is to create an instrument, using only items from around the home, which do the following three things:
1. It must produce sound.
2. It must change pitch.
3. It must change volume.
(Can you imagine the exuberance of Big Stuff's scientist father?)
Here is what Big Stuff came up with:
|Making sound: Striking a large, water filled goblet with a butter knife.|
|Experimenting with sound and strings on the melody harp.|
|Striking the glass with no water.|
|Rubbing the rim with a wet finger.|
And that produced a sound that was the same as when he struck the water-filled glass. So, how about this?
|Rubbing the rim of a smaller glass with a wet finger.|
The pitch was higher!
Through his various experiments, Big Stuff discovered the elements of sound including, pitch, volume, and resonance (thanks to the last part with rubbing the rim of the smaller glass...).