A physics teacher once asked what would happen if water, when freezing
into ice, became smaller as it got colder like all other materials. At
the
time it seemed simple, the ice wouldn't expand so no more cracked
engine
blocks and manifolds. Also docks wouldn't be lifted in winter and boats
could probably be left in the water all winter. Other than that, not
much
change right? The answer was surprising! What do you think? Dixon

Well, among other things, ice would sink. The end result could be, no
more northern lakes, as the ice would fill them, and only the top layer
would thaw.

Kind of a reverse turn over only permanent.

Interesting.

Later,

Tom

The way I was told the ice wouldn't form at the surface and thus insulate
the water below from freezing. Oceans and lakes would freeze from bottom up
due to the denser ice sinking. The ice caps would grow larger. Lakes
wouldn't completely thaw in summer. The growing area of ice would reflect
sunlight, further cooling the earth to a point where the planet would be
uninhabitable. All water would soon be ice. I'll admit there may be holes
in the theory somewhere though.
Dixon