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Show the following clip to further explain the concept understanding vibration sounds video Go back to yesterday's activity about sounds. Using the new vocabulary, go over low and high pitch sounds by changing the size of rubber bands and talk about how the plucking of the rubber bands created a vibration. Opportunity for Talk Moves-Challenge or Performance Expectations: 1-PS4-1. Plan and conduct investigations to provide evidence that vibrating materials can make sound and that sound can make materials vibrate. 1-PS4-4. Use tools and materials to design and build a device that uses light or sound to solve the problem of communicating over a distance. Learning Goals: Sound comes from vibrating objects. Sound and light devices can be used to communicate information.