Elephant Toothpaste

We finished our week-long Slime Lab experiments involving chemical and physical changes with the coolest chemical reaction of all - Elephant Toothpaste!  

This chemical reaction actually separates the oxygen from hydrogen peroxide and forms heaps of oxygen-filled foam bubbles.  Check it out!

To do this experiment at home, follow these simple directions:

1. Make sure to wear some sort of protection over your eyes.
2. Pour around 100-200 milliliters of hydrogen peroxide into an empty soda bottle.  The exact amount doesn't really matter.  But the more hydrogen peroxide, the more foam!  
3. Add a squirt of liquid dish soap and a few drops of food coloring.  
4. Swish the bottle around so that the hydrogen peroxide, soap, and food coloring mix.  
5. In a separate container, mix a spoonful of dry yeast with four spoons of water.  
6. Remove any excess clumps of dry yeast.
7. Pour the dry yeast mixture into the bottle and observe the fountain of foam!  

I'll post directions for the other slimes and goos we made this week later this weekend.