I am sure you have seen it before but this is a cool video:
There is actually quite a bit of science in the Diet Coke and Mentos eruption. Mentos have millions of tiny pits all over their surface – just like the dints on golfballs but way smaller. These pits are called nucleation sites and are great places for bubbles of carbon dioxide to form, of course soft drinks have lots of carbon dioxide in them (thats the fizz). So lots of nucleation sites combined with lots of dissolved carbon dioxide makes heaps of bubbles!
Now I am quite fond of the country Belgium. That is why I was happy to see around 1,500 belgian students kitted out in waterproof ponchos discovering exactly what happens when you drop a mentos into a bottle of Coca Cola. They did it in an attempt to break a world record. And apparently they were successful 🙂
Vodpod videos no longer available.
People who say science isn’t fun are crazy!