Spencer 8th grade science classes have been learning about physical and chemical reactions. We have completed many labs from combining baking soda with vinegar to test how temperature impacts glow sticks. But the most exciting lab by far was Elephant’s Toothpaste.
This experiment is called Elephant’s Toothpaste because the chemical reaction produces a large foamy mess that looks like toothpaste squirting out of a tube. The foam is actually filled with oxygen that came from the hydrogen peroxide. We used yeast as a catalyst to remove the oxygen and to increase the reaction rate. The expressions on the student’s faces were priceless as the thick foam oozed or shot out of the bottle!
Submitted by Mrs. Barton