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Crazy Stuff Fantasic Foamy Fountain / Elephant ’ s toothpaste
How does it work : Foam is awesome ! The foam you made is special because each tiny foam bubble is filled with oxygen . The yeast acted as a catalyst ( a helper ) to remove the oxygen from the hydrogen peroxide . Since it did this very fast , it created lots and lots of bubbles . Did you notice the bottle got warm . Your experiment created a reaction called an Exothermic Reaction – that means it not only created foam , it created heat ! The foam produced is just water , soap , and
You will need :
• A clean 16 ounce plastic soda bottle
• 1 / 2 cup 20-volume hydrogen peroxide liquid ( 20-volume is a 6 % solution , ask an adult to get this from a beauty supply store or hair salon )
• 1 tablespoon ( one packet ) of dry yeast
• 3 tablespoons of warm water
• Liquid dish washing soap
oxygen so you can clean it up with a sponge and pour any extra liquid left in the bottle down the drain . This experiment is sometimes called “ Elephant ’ s Toothpaste ” because it looks like toothpaste coming out of a tube , but don ’ t get the foam in your mouth !
How to proceed : 1 . Hydrogen peroxide can irritate skin and eyes , so put on those