Have students put on their safety glasses and lab smock. Each student should have in front of them a cake pan, plastic bottle, Dawn in small cup, food coloring, 1/2 cup peroxide, and the dissolved yeast mixture.
Stand the bottle up in the center of the cake pan. Put the funnel in the opening. Add 3-4 drops of food coloring to the peroxide and pour the peroxide through the funnel into the bottle. Show a water molecule diagram and a peroxide molecule diagram, pointing to the extra oxygen that will be set free in the reaction.
Add the Dawn detergent to the peroxide in the bottle.
Pour the yeast mixture into the bottle and quickly remove the funnel.
The students can touch the bottle to feel any changes that take place