stemnotesBlanH

__**ELEPHANT TOOTHPASTE**__ 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 of bubbles. This experiment creates a reaction called an Exothermic Reaction that means it not only created foam it creates heat. The foam produced is just water, soap, and 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. Hypothesis: Will the water foam up and explode? What actually happened: The water did foam up and foamed for at least 40 seconds before i needed to add more yeast. Presider: I put some hydrogen peroxide into a bottle. Then I mix yeast in hot water. I poured the yeast mixed in and the bottle exploded with toothpaste.