MATERIALS: water, beaker, pepper, detergent, alcohol, capillary tube, washing soda, rice, sugar

PROCEDURE: Experiment 1. Partially fill a glass with water. Sprinkle pepper all over the surface. Now drip a drop of liquid detergent onto the surface, in the center of the peppered area. Record what happens and why?

Drop a little alcohol on a peppered surface. What happens?

Experiment 2. Try and suck water through a capillary tube (like you would through a drinking straw). What happens and why?

Experiment 3. Using 250 ml of water, try to dissolve 1 ml of salt, fine sand, tea leaves, washing soda, rice, and sugar. Record what happens. Warm the water with a Bunsen burner or heating surface. Try and dissolve the same amount of substance in warm water. Record what happens.

CONCLUSION: Identify the scientific principle in each experiment?