In this lab, students explore how sound energy is created. First, students brainstorm all of the different ways that sound can be made by the item. Then, they choose one and observe the vibration that is created to make the sound. Then, students take the can phones and observe that when the string is loose, no sound can be made; and when the string is tight, sound can be heard.
Materials needed are tuning forks, cans (or cups), yarn, rubber band, and balloons.