🎈 Syringe Tank Particle Models

Using syringes, balloons, temperature tubs, and particle cards, students model how heating and cooling affect gas particle motion, spacing, pressure, and volume in scuba tanks and underwater gear. The teacher models one example, then pairs run short trials and sketch before-and-after particle diagrams connected to the dive context. Students add one quantitative or observational note from each trial to support later air-planning decisions.