Syringe Air Spring
The plunger pushes back and springs outward.
Teaching & key ideas
What you do: Push the plunger against trapped air and release.
What students see: The plunger pushes back and springs outward.
Why it works: Air can be compressed and its pressure rises as its volume shrinks.
Question to ask: Can air act like a spring?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Can air act like a spring?