Ok -we tried to find just one winner, but it was impossible to decide between two of the explanations! So I will award one coke and mentos launcher to each person (I will send them to you in the internal mail!). Congratulations to the following students:
- Alyssa Campbell in 4G
- Jessica Lazaro in 4E
Their explanations are below:
Alyssa: "There is carbon dioxide in Coke. On the surface of the mentos there are tiny holes in which the carbon dioxide goes into and then creates bubbles. By the time the mentos reach the bottom of the bottle they go right back up and out in the explosion."
Jessica: "Here is what I think about the mentos and coke experiment. don't think that it was the chemicals that reacted. I think it was because of the mentos which had an incredibly rough surface [lots of miniscule little bumps]. When you add the mint mentos to the coke, millions of bubbles appeard at a very high speed. This is because of the rough surface on the mentos. When the bubbles appear the only place they can go is out of the hole in the top. This experiment does not work with fruity mentos because they have a very smooth surface. And that is why the coke comes out of the bottle like a fountain.
I used this website to help me under stand what happened.
http://en.wikipedia.org/wiki/Diet_Coke_and_Mentos_eruption#cite_note-1
Thanks to all of you that emailed me with your explanations. Hope to see you next year!
Mr Taylor
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