Self-Starting Siphon
Water keeps flowing uphill over the rim then down.
Teaching & key ideas
What you do: Prime tube, then place outlet lower than source.
What students see: Water keeps flowing uphill over the rim then down.
Why it works: A continuous liquid column plus gravity/pressure difference drives flow.
Question to ask: Why can water travel up before it travels down?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why can water travel up before it travels down?