If we wanted to get the water out of a bath tub whose drain was not working, we would need a rapid siphon; a slow siphon might be useful to keep your pet salamander wet while you cleaned out her cage. So we need to determine what affects the flow rate, so we can do these things.
Do the activity "Siphons #5 Does the height of the end of the tube affect the flow rate in a siphon system?"

What other variables affect the flow rate? What could you do to make the flow rate really fast or really slow?

Check the box when you are done:  

Next:Energy, fluids, and siphons