This is one of my absolute favorites, because it’s so unexpected and unusual… the setup looks quite harmless, but it makes a sound worse than scratching your nails on a chalkboard. If you can’t find the weird ingredient, just use water and you’ll get nearly the same result (it just takes more practice to get it right). Ready?
NOTE: DO NOT place these anywhere near your ear… keep them straight out in front of you.
Here’s what you need:
- water or violin rosin
- disposable plastic cup
- pokey-thing to make a hole in the cup
- What does the rosin (or water) do in this experiment?
- What is vibrating in this experiment?
- What is the cup for?