In this lesson, Jared uses a guitar, xylophone, bottle of water and rulers to show us how the pitch of sound changes. Are you a teacher? Click this link for free resources to use in the classroom related to this topic: Check out more videos like this on our channel FunScienceDemos, and do not forget to subscribe and click the bell to stay updated on new videos! There is so much more to explore on our companion website! Check out the link below for additional resources meeting Next Generation Science Standards for elementary through high school: