Self-Starting Siphon

Water keeps flowing uphill over the rim then down. Ask students to predict what will happen. Prime tube, then place outlet lower than source. Key idea: A continuous liquid column plus gravity/pressure difference drives flow. Ask: Why can water travel up before it travels down? Safety and cleanup: Use tray; teacher primes tube. https://www.google.com/search?q=%22Self-Starting+Siphon%22+science+demonstration+experiment