Author: Belén M. Garzón

Finally, they checked what happened when they  hit a tambourine next to a ping pong ball. 

In this case, students were checking how string phones worked.

If you produce a sound next to the bowl, the pieces of paper will jump because of the vibration.

Students of  1º ESO C did different experiments demonstrating that sound is a vibration. In this picture, we can see string phones and mouth organs. These ones are made with sticks and elastic bands that vibrate when you blow.