Today we did a chemical change where we made elephant’s toothpaste. We used Food colouring, yeast, dishwashing liquid, hydrogen peroxide and warm water. The first thing you add is the hydrogen peroxide. The the next step is to mix the yeast and warm water in a separate cup. Then wants you have mixed it thoroughly then you add the food colouring and two tablespoons of dishwashing liquid. Than you add the warm water and yeast and observe it overflow. This is a chemical reaction when you do something that is irreversible.
