Exploratorium
Exploratorium: Science Snacks: Vortex
Investigate centripetal force in this activity where you create a mini-tornado in two connected soda bottles.
TeachEngineering
Teach Engineering: Windstorm
In this activity, students will learn about how tornadoes are formed and what they look like. By creating a water vortex in a soda bottle, they will get a first-hand look at tornadoes.