The Mentos/soda rocket is one of our favorite blow-them-up experiments. We are completing a small 4th of July studies. For my son, this means BLOW-UP things!
We have already exploded baking soda water bottle bombs in the middle of the road. (One was WAY too realistic!)
When another family came over to share in the fun, I pulled out my Mentos rocket do-dad and let The Boy put on the show!
Steve Spangler’s Geyser Tube (amazon)
We used Dr. Pepper Ten® (We’ve used Diet Coke) and fruit flavored Mentos. Unfortunately we lost the string that comes with the geyser so we used a nail and string…worked beautifully.
Warning: Once you pull the string jump back. It takes a couple of seconds, but if you don’t move, you will get a bath.
What is the purpose of this experiment (besides just having fun)? To introduce your child to the world of chemistry and physics.
Experiments in a 2006 edition of the Discovery Channel programme Mythbusters suggested the chemicals responsible for the reaction are gum arabic and gelatine in the sweets, and caffeine, potassium benzoate and aspartame in the Coke. But there have been no rigorous scientific studies of the reaction until now.
Muir, Hazel (2008). Science of Mentos. Diet Coke Explosion explained. Retrieved from http://www.newscientist.com/article/dn14114-science-of-mentosdiet-coke-explosions-explained.html.
The kids will be completing a research project to find for themselves how the candy will react to different sodas. Stay tuned for the results!
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