Paper Ball Stays in a Funnel
The ball can stay in the funnel instead of blowing away.
Teaching & key ideas
What you do: Place ball in funnel and blow through the narrow end while tilting.
What students see: The ball can stay in the funnel instead of blowing away.
Why it works: Fast-moving air lowers pressure and surrounding air helps hold the ball in place.
Question to ask: Why doesn't your breath push the ball out?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why doesn't your breath push the ball out?