In polar region, during winters, the whole sea gets covered with ice Can you tell why aquatic animals are able to survive in such conditions? why the bottom of the sea remains in a liquid state and doesn't get frozen?
Answers
Answer:
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Answer:
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Explanation:
If the temperature is cold enough, ocean water does freeze. The polar ice cap at earth's North Pole is a giant slab of frozen ocean water. At earth's South Pole, the land mass constituting Antarctica complicates the situation, so most of the ice there is compacted snow. Over cold regions such as Antarctica, Greenland, and Canada, the fresh water in the air freezes to snow and falls onto the land without a melting season to get rid of it. Over time, this snow builds up and compacts into an ice mass known as a glacier. Gravity slowly pulls the glacier downhill until it reaches out onto the ocean, forming an ice shelf. The ocean-bound edge of the ice shelf slowly crumbles into icebergs which float off on their own path. For this reason, glaciers, ice shelves, and icebergs are all thick sheets of frozen fresh water and not frozen ocean water. In contrast, when ocean water freezes, it forms a thin flat layer known as sea ice or pack ice. Sea ice has long been the enemy of ships seeking an open route through cold waters, but modern ice breaker ships have no problem breaking a path through the fields of frozen ocean.
Despite the fact that the oceans do freeze when the temperature is cold enough, ocean water does indeed stay liquid under much colder weather than one would first expect. For instance, go to the beach on a winter day and you may be surprised to find that the ocean is still liquid despite the snow and ice on the ground being frozen. There are four main factors that keep the ocean in a liquid state much more than may be expected, as described in the textbook Essentials of Oceanography by Tom Garrison.
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