Make Non‑Newtonian Ooze (Oobleck)

Create a cornstarch‑and‑water mixture that behaves like a solid when you push it and a liquid when you relax.

Materials

• Cornstarch
• Water
• Bowl
• Spoon
• Food coloring (optional)

Steps

1. Mix 2 parts cornstarch with ~1 part water slowly until it feels like honey when stirred.
2. Squeeze it quickly — it turns solid; let go — it flows.
3. Try tapping, punching, or slowly sinking fingers to compare behavior.

What’s happening (the science)

• Oobleck is a shear‑thickening fluid: particles jam under sudden force creating temporary solid‑like behavior.
• Viscosity depends on force rate, not just temperature.

Safety & cleanup

• Avoid sinks; dispose in trash not drains.
• Cover tables; it can be messy.
• Wash hands after play.

Tip: Extend this activity by asking students to measure, graph, or compare versions (e.g., different designs or variables).