Mrs. Jackson's pitch exploration

This week Mr. Bouchard joined Mrs. Jackson's class to explore the concept of pitch as part of their sound unit. Students made predictions on how adding more or less water to a test tube would affect the pitch when they blew across the top. The class practiced recording their findings and they came up with conclusions based on their findings. One big ah-ha was that the more water in the tube the higher the pitch, also it's not the water that vibrates to make the whistling sound. Instead the class agreed that the air is vibrating to create the sound!