Hot/Cold Convection Tank
Warm rises and cold sinks into visible currents.
Teaching & key ideas
What you do: Release colored warm/cold water carefully.
What students see: Warm rises and cold sinks into visible currents.
Why it works: Temperature changes density, driving convection.
Question to ask: How does heat make water move without stirring?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How does heat make water move without stirring?