Water Held by a Mesh Screen
Water can remain in the inverted cup behind the mesh.
Teaching & key ideas
What you do: Cover cup with mesh, invert carefully, then remove support card.
What students see: Water can remain in the inverted cup behind the mesh.
Why it works: Surface tension bridges the tiny openings while air pressure helps support the water.
Question to ask: How can a screen full of holes hold water?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can a screen full of holes hold water?