A great place to start.
If you have read the wave basics article and need more information then this article is the place to go.
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Consider simplifying this activity by just asking students to demonstrate a simple sound wave to start with. Then as you introduce new concepts, ask students to represent these ideas too and discuss what works well.
A summative task could include this way of demonstrating their knowledge about waves. This article: https://www.sciencelearn.org.nz/
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