Introduction: Easy Elephants Toothpaste Experiment

Fun With Foam
Foam is fun! Check out this video to see our Fantastic Foamy Fountain in action. The experiment uses Hydrogen peroxide and dry yeast. Hydrogen peroxide is similar to water but it has an extra oxygen atom. This makes it more dangerous and only adults should handle the hydrogen peroxide.

When you add the yeast, it acts as a catalyst (a helper) to release the extra oxygen gas and the soap helps to create all the foam. Try it out yourself!

The second experiment with the giant foam eruption at the end used a more powerful hyrogen peroxide and a different chemical for a catalyst. The reaction happens very fast and gives off quite a bit of heat. It's pure foam fun! I mean pure science.

You can get the full step by step directions at:

http://www.sciencebob.com/experiments/elephants_toothpaste.php

Comments

author
thecrazymagnetman made it!(author)2016-06-15

We actually have some 30 percent in our basement. I might do this.

author
RedneckAsian made it!(author)2009-12-04

IF the bubbles are filled with oxygen then i bet you could light them on fire!

author
bluesteele13 made it!(author)2016-03-31

In another article about this, meant for science classes, they suggested an experiment to demonstrate your point. Light a match and then blow it out. Right away (before the match can cool), hold the match just above the foam - the influx of oxygen should reignite the match if there's any ember left in it. I imagine this works better if you hold it above the tube the foam is flowing out of.

author
whait86 made it!(author)2010-11-11

oxygen doenst burn, it only makes things more flamable in an oxygen rich atmo, so by the time the "foam" has expanded enough the o2 will have dissapated

author
jkygi made it!(author)2010-02-25

how does the foam rise? 

author
bluesteele13 made it!(author)2016-03-31

Hydrogen Peroxide is H202 (two hydrogen atoms, 2 oxygen atoms). The yeast acts as a catalyst, separating the H202 into H2O + O (it splits into water and oxygen). This reaction also releases heat.
All this heat, water, and oxygen creates steam. Because you added dish soap, the rising steam makes bubbles (foam).

author
Madison+Hall made it!(author)2014-12-12

The yeast of the foam makes it rise

author
kaseton11 made it!(author)2014-05-01

The elephantoothpast is the experiment for ever one 5 throw 30 year olds.

author
dingbatqueen made it!(author)2011-05-12

And my stupid question is...what does this have to do with elephants?

author
kipluck made it!(author)2012-06-25

We do this with our day camp kids here at Thanksgiving Point. Sometimes, to fit a theme we call it things like "Ogre's Toothpaste," too, but basically anything BIG... the pop bottle is like a giant tube of toothpaste, with the squirting foam looking a bit like it as well.

author
ichsan1 made it!(author)2011-07-12

Can I use MnO2 (Manganese dioxide) as an catalyst?

author
Wizzie49 made it!(author)2011-01-27

LLOOVVEE IITT!!

author
firecraker222 made it!(author)2009-03-14

HEY IM SORRY BUT I WAS WONDERING WHAT WAS THE GREEN LIQUID IN THE EXPERIMENT ( I DONT HAVE SOUND)

author
joaquinakiwi made it!(author)2011-01-03

it was green dish soap

author
karossii made it!(author)2009-03-13

so what is the chemical catalyst in the giant eruption?

author
Biopyro made it!(author)2009-03-15

The catalyst is an enyme in the yeast called catalase. It also occurs in the human body for destroying free radicals created by cell processes

author
sciencebob.com made it!(author)2009-03-14

Hi Karossil, The catalyst in the second experiment was a sodium iodide solution.

author
firecraker222 made it!(author)2009-03-14

NEVER MIND I GOT IT ITS SOAP RIGHT???

About This Instructable

57,976views

37favorites

More by sciencebob.com:Science Experiment: Inflate a Balloon with Vinegar & Baking SodaHow To Make Slime - Method 2Make an Erupting Volcano - Safe
Add instructable to: