Accepted Answer
There is no logical reason for it. Every substance known gets smaller when it freezes from the liquid form to the solid form, and for every substance, a lump of it sinks to the bottom in a bottle of it.Except for one unusual known substance . . . water !The only known substance that gets bigger when it freezes.That's why ice cubes float in your soda, that's why icebergs float in the ocean, that's why a full bottle of water cracks in the freezer, and that's why water that seeps into the crack in a rock can chip pieces off of the rock in the Winter. An interesting factoid, to amuse and amaze your friends with. And also, by the way, if water didn't do that, then life on Earthwould not be possible.==========================================The real reason for it has to do with the shape of the water moleculeand where the valence electron from the hydrogen atom goes andstuff like that. I don't know anything about that stuff.
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