Water Rolls Off a Waxy Leaf
Drops bead and roll differently.
Teaching & key ideas
What you do: Place drops on waxy and non-waxy leaves.
What students see: Drops bead and roll differently.
Why it works: Waxy coatings repel water and change surface adhesion.
Question to ask: How might a waxy surface help a plant?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How might a waxy surface help a plant?