Bendy Potato Osmosis
One strip becomes firmer, another limp.
Teaching & key ideas
What you do: Compare stiffness/bendiness.
What students see: One strip becomes firmer, another limp.
Why it works: Water moves across cell membranes toward regions with more dissolved particles.
Question to ask: Why did the same potato become different?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why did the same potato become different?