Water Boils in a Syringe
Warm—not hot—water begins bubbling/boiling.
Teaching & key ideas
What you do: Seal tip, pull plunger to lower pressure.
What students see: Warm—not hot—water begins bubbling/boiling.
Why it works: Lower pressure lowers the boiling temperature.
Question to ask: How can water boil without getting hotter?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can water boil without getting hotter?