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Snow and ice are the same thing. What happens to the molecules when you bring energy into those (heat, microwaves, motion) they start to vibrate. The more you bring in energy the more they vibrate.
Think ice as a group of people who are hugging all each others. Then they all start to jump more and more rapidly. To jump faster, at some point they have to let loose each others -> ice melts. If you keep on putting on energy they need more and more space -> boiling.
Surprisingöy thought water has it´s highest density when in 4 celcius-> ice needs more space than water. It´s the only known liquid to act that way.
A great example of water swelling while they freeze is an exploded beer bottle in my friends car. He has kept his whole car frozen now for few days cause he´s too lazy to clean it up, but still he doesn´t want the beer to melt all over his car.
The lesson of the whole story is taht not all yellow snow is bad. Some of it MAY be beer. So next time you pass a suspicious looking spot, go on and try it. Just see first that there aren´t any dogs sniffing around it =D
[ 03-02-2005, 12:31 PM: Message edited by: Jani ]
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