Science in Y7J: Collapsing Cans

Hi,
As usally the class has been a bit crazy but we manage to learn something.
At first we did particle demostrations (showing how water boils and freezes).
Then we looked at a fancy experiment. We boiled water inside a Fanta can and
we hold it under cold water.
RESULT:
The can squashed itself (it can sound a bit strange, but its true).
CONCLUSION:
Few steam particles were left inside the Fanta can, and outside it, there was a large number of them, so when you collapse the can's hole, the outside particles pushed the Fanta can until it
squashed.