Grouping: Teacher demo + small-group investigation
Take-home: Optional connected-vessel model
Key ideas: Fluid pressure, connected containers, equilibrium, gravity.
Start with: Connect three differently shaped bottles/tubes and ask where the water lines will settle.
Success check: Students predict then observe that connected water surfaces settle to the same level when pressure conditions match.
Try changing: Container shape; connection height; tilt.
Preparation: Build leak-free connected-vessel setup before class.
Lesson flow: Day 1: Predict water levels → run demo → small-group tubing model if feasible → sketch/explain equilibrium
Video:
Same Level Of Water On 3 Bottles?
Safety and cleanup: Water only; secure tubing; wipe spills; use plastic containers.
https://www.youtube.com/shorts/7cVQw7c4Hug