We found water under ice layer in the lake or ocean like Antartica. Why whole water donot get converted to ice.
2007-03-03 03:37:13 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Geography
you have some good pieces of the puzzle.
Ice expands making it less dense..so it floats. But before freezing happens something interesting happens.
Water becomes more dense as it cools..so as the surface cools that water is getting heavier and sinking, bringing warmer water rising to the surface (just like air), this is fortunate because it turns the water and otherwise the water at the bottom would be oxygen depleted after a while. This turning continues until 4 degrees C is reached..at this point water becomes less dense as it cools..so the ice forming on top will stay on top. and the 4 degree C water will stay on the bottom. If it's a big lake, you also have more pressure on the water at the bottom, so it lowers the freezing point..so it has to be much colder for the water to freeze in the deep areas of the lake. This also explains why bigger lakes take longer to form any ice than a small puddle.
2007-03-03 07:15:35 · answer #1 · answered by Jennifer B 3 · 0⤊ 0⤋
Water freezes from the top down. Once a certain thickness is reached, the ice on top insulates the remaining water below, and prevents it from freezing all the way through.
It's a good thing that water has this chemically odd property, because if it didn't, all the water on Earth might freeze solid, and at the least, no fish would survive in lakes in winter.
2007-03-03 03:47:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The entire body of water does not get frozen, because the surface is closest to the cold air. That freezes first, and it makes it harder for the cold air to freeze water deeper down. It does have something to do with depth too. Hope I helped.
2007-03-03 08:48:29 · answer #3 · answered by d 3 · 0⤊ 0⤋
that happens because the upper water layer is affected from temperature first and freezes. Therefore it prevents temperatures below 0 to go further down to the lower layers.....hope I helped ya!
2007-03-03 03:46:32 · answer #4 · answered by Anonymous · 0⤊ 0⤋
the right nature of the water *in all probability* mendacity under Europa's miles-thick ice hasn't been desperate as yet. even nevertheless, there is not any reason in anyway that existence in some style could not have taken carry there.
2016-12-18 04:50:36 · answer #5 · answered by ? 4 · 0⤊ 0⤋
As ice is lighter then water, it floats over water.
2007-03-03 03:51:31 · answer #6 · answered by Ana C 3 · 0⤊ 0⤋
ground temp stays above freezing and therefore only the top layer can freeze
2007-03-03 03:44:48 · answer #7 · answered by Anonymous · 0⤊ 0⤋