The bottle should have gotten warm as well. Since this was done so fast, it created a lot of bubbles. The yeast acted like a catalyst (helper) to remove the oxygen from the hydrogen peroxide.

So, what happened? What made the foam occur so suddenly when the yeast was added? Pour the yeast mixture into the cylinder and watch out! Initially we did this experiment with 3% hydrogen peroxide and discovered there was no reaction, so you want to be sure you have the higher concentration. Swish around.Īdd food coloring of choice, about eight drops.Ĭombine warm water and dry yeast. We picked up ours at a local beauty supply storeĪdd the ½ cup of hydrogen peroxide to the cylinder vase or bottle.Īdd a few pumps (1 Tablespoon about) of dish soap to the hydrogen peroxide.

½ cup 20 volume concentrated hydrogen peroxide Do not use 3% drug store hydrogen peroxide – anything lower than the above will not work for this experiment.

Cylinder vase (or 16 oz plastic soda bottle will work,too).

You may also like: Leaf Color Experiment-Color Science for Kids Supplies This experiment makes quite a bit of foam, so a washable surface or tray is recommended. We also recommend an adult to do the pouring of this liquid.

This neat elephant toothpaste experiment will resemble what happens when you squirt out toothpaste from a tube – in foam form!ĭisclaimer: Because a high concentrated level of hydrogen peroxide is being used, we recommend wearing safety goggles as it can irritate skin and eyes.

What is elephant's toothpaste