Water Beads Up on Wax Paper
Water forms rounded beads instead of spreading flat.
Teaching & key ideas
What you do: Place drops and push them together/apart.
What students see: Water forms rounded beads instead of spreading flat.
Why it works: Water molecules attract each other more strongly than the waxy surface.
Question to ask: Why is the drop round?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why is the drop round?