Classroom mode

Run it in class

Why can cornstarch goo feel solid and liquid?

Show of hands — before you project anything

Why does a connected contact path matter more than one isolated touching pair?

  • A Way more than you'd guess
  • B About what you'd guess
  • C Way less than you'd guess

Count the votes out loud. Hold them to it — then watch.

Project it (fullscreen)

Discussion prompts

  • Why does a connected contact path matter more than one isolated touching pair?
  • How does giving grains more time let the mixture respond differently?
  • What variables besides speed might change whether a contact network forms?

Where it shows up in real life

  • Oobleck that resists a quick tap but flows through fingers
  • People running across a pool of cornstarch suspension
  • Impact-resistant fluids researched for protective gear

A prediction-first worksheet — no answer key.

zero prep · no login · any projector

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