tm america
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interesting thought on the ice in a lake . i thought it worked a little different than that .i thought the ice floats for the same reason a ship floats. this being it is a less dense solid and as it trys to force it'self down it has to displace the water since the water weighs more than the ship .it cannot displace the water so the ship or ice floats. and i also thought the reason the whole lake doesnt freeze is the same reason the earth doesnt freeze.there are frost lines on land they can vary from 0 to 6 ft down in some places .around here the frost line never goes below 42inchs.but the reason the frostlines are as they are is because the earths core is hot .it has a pretty consistant temp .where air temps on the outside of the earth vary, in nw indiana the cold can only go so far down before it is overcome by the heat from the core of the earth.water disapaits heat at a different rate than a solid so. the ice doesnt go down as far in water as it does on land.as the water turns from liquid to solid it floats as it cant displace the rest of the water in the lake or pond...
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