Walking Water
Colored water climbs and moves into the empty cup.
Teaching & key ideas
What you do: Connect full and empty cups with folded paper towels.
What students see: Colored water climbs and moves into the empty cup.
Why it works: Water sticks to fibers and to itself, pulling more water along.
Question to ask: How can water climb upward?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can water climb upward?