Hooked on Science - Elephant Toothpaste (08/19/2019 - 08/25/2019)


• 16 oz Plastic Bottle

• 20-Volume Clear Developer

• Yeast

• Dishwashing Liquid

• Warm Water

• Plastic Cup


STEP 1: Pour ½ a cup of 20-volume clear developer into the plastic bottle. Add 1 tablespoon of dishwashing liquid and mix. Describe and classify the mixture by its observable properties.

STEP 2: Mix 1 tablespoon of yeast with 2 tablespoons of warm water, in the plastic cup, and wait 30 seconds. Describe and classify the yeast, before and after adding warm water, by its observable properties.

STEP 3: Pour the yeast and warm water mixture into the plastic bottle containing 20-volume clear developer and dishwashing liquid. What happens? Did adding the yeast into the plastic bottle, containing 20- volume clear developer and dishwashing liquid, result in a new substance?


The yeast acts as a catalyst, quickly removing the oxygen from the 20- volume clear developer, creating a lot of foam. The plastic bottle feels warm since the chemical reaction releases a lot of heat. A chemical reaction releasing heat energy is called an exothermic reaction.


PLEASE follow these safety precautions when doing any science experiment.

• ALWAYS have an adult present.

• ALWAYS wear the correct safety gear while doing any experiment.

• NEVER eat or drink anything while doing any experiment.

• REMEMBER experiments may require marbles, small balls, balloons, and other small parts. Those objects could become a CHOKING HAZARD. Adults are to perform those experiments using these objects. Any child can choke or suffocate on uninflated or broken balloons. Keep uninflated or broken balloons away from children.


Jason Lindsey

STEM Certified Educator, Science Multimedia Journalist, and Meteorologist

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