Presented by: Dr. Ashley Day and Noelle Hoyle
In this activity, you will be using chemical reactions to make elephant toothpaste.
Caution: hydrogen peroxide can irritate your eyes.
Make sure to handle with care and wash your hands after using.
While the result of this activity looks like toothpaste, it is NOT. Do not eat!
Place your plastic bottle on a tray or tub so that it is easy to clean up.
The chemical reaction gives off heat, handle with care.
Yeast are single-celled fungi. Fungi are eukaryotic organisms that absorb nutrients for energy. These yeast are dominant and adding warm water rehydrates and allows them to function as active cells.
Yeast have an enzyme, catalase, that can quickly break down hydrogen peroxide in water and oxygen gas (2H2O2 → 2H2O + O2). When the oxygen is released, it changes the soap to FOAM.