🌡️ Particle Models for Dive Choices

Using syringes, balloon demos, scuba tank diagrams, and whiteboards, students revisit how heating and cooling change gas particle motion, spacing, pressure, and volume in dive tanks and gear. Teams create quick annotated particle sketches tied to one air-supply decision and one warmth decision they may include in a design. The teacher models sentence frames that connect the visual model to a testable claim.