Oobleck Dances on a Speaker
Oobleck forms moving fingers/blobs.
Teaching & key ideas
What you do: Drive low-frequency sound under a thin oobleck layer.
What students see: Oobleck forms moving fingers/blobs.
Why it works: Rapid vibration repeatedly jams and unjams the shear-thickening suspension.
Question to ask: Why does sound make a liquid stand up?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why does sound make a liquid stand up?