Dancing Polymer

We create a polymer using cornflour and water called oobleck. Oobleck is a non-Newtonian liquid that behaves like a solid and a liquid. When placed on a speaker, the vibrations cause the polymer to constantly change its behaviour and it appears to dance.

Physics - Waves - Learning Points.
Non-Newtonian liquids have a viscosity that changes, depending on the speed of the force that is applied.
If pressure waves are as fast as 50 Hz, the molecules in oobleck lock together to behave like a solid.
If pressure waves are slower than about 50 Hz, the molecules in oobleck have time to slide past each other and behave like a liquid.
Ultrasound is used in dental cleaning and is able to break the molecular bonds in tartar and plaque as it passes through a tooth.

A Twig Experiment Film.
Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.