Ms. Frizzle and her class learn about vibrations and sound by playing with instruments and hitting objects. They not only hear and feel sound but see it using special glasses. Among many other lessons, they learn that high sounds are created by a fast vibration and low sounds are created by a slow vibration.
Using an oscilloscope, electronic keyboard, and piano, Bill Nye shows what the waves look like for sounds of varying pitches. He also explains how notes and rhythm play a role in forming what we define as music.