Diaper Polymer Drinks Water
Tiny powder traps a large volume of water into gel.
Teaching & key ideas
What you do: Add water to small polymer sample.
What students see: Tiny powder traps a large volume of water into gel.
Why it works: Charged polymer chains attract and hold water.
Question to ask: How can a little powder hold so much water?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can a little powder hold so much water?