because it contains dissolved salts in it ...so the salinity high and SO its salty
2007-02-05 17:17:34
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answer #1
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answered by Anonymous
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Everyone who has been to the beach knows that seawater is salty. Everyone also knows that fresh water in rain, rivers, and even ice is not salty. Why are some of Earth’s waters salty and others not? There are two clues that give us the answer. First, “fresh” water is not entirely free of dissolved salt. Even rainwater has traces of substances dissolved in it that were picked up during passage through the atmosphere. Much of this material that “washes out” of the atmosphere today is pollution, but there are also natural substances present.
As rainwater passes through soil and percolates through rocks, it dissolves some of the minerals, a process called weathering. This is the water we drink, and of course, we cannot taste the salt because its concentration is too low. Eventually, this water with its small load of dissolved minerals or salts reaches a stream and flows into lakes and the ocean. The annual addition of dissolved salts by rivers is only a tiny fraction of the total salt in the ocean. The dissolved salts carried by all the world’s rivers would equal the salt in the ocean in about 200 to 300 million years.
A second clue to how the sea became salty is the presence of salt lakes such as the Great Salt Lake and the Dead Sea. Both are about 10 times saltier than seawater. Why are these lakes salty while most of the world’s lakes are not? Lakes are temporary storage areas for water. Rivers and streams bring water to the lakes, and other rivers carry water out of lakes. Thus, lakes are really only wide depressions in a river channel that have filled with water. Water flows in one end and out the other.
The Great Salt Lake, Dead Sea, and other salt lakes have no outlets. All the water that flows into these lakes escapes only by evaporation. When water evaporates, the dissolved salts are left behind. So a few lakes are salty because rivers carried salts to the lakes, the water in the lakes evaporated and the salts were left behind. After years and years of river inflow and evaporation, the salt content of the lake water built up to the present levels. The same process made the seas salty. Rivers carry dissolved salts to the ocean. Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the ocean. Because of the huge volume of the oceans, hundreds of millions of years of river input were required for the salt content to build to its present level.
2007-02-06 12:10:37
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answer #2
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answered by Anonymous
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Salts are dissolved by rainwater and flow into the oceans where the water evaporates and the salt is left behind.
I believe the oceans are holding as much salt as they can though and are not continuing to rise in salinity.
2007-02-05 04:56:34
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answer #3
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answered by Anonymous
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There is a legend that says a fairy once gave to a poor family a grinding mill, with it they could replicate any food or object they put inside. But a bad man steal it from them and put it to do salt that was a rare exotic expensive spice on those times, but he order it to do it while he was on his ship, and because he was stealing the grinding mill in a hurry he only remembered the magic words that put it in function but he couldn't remember the words that made it stop.And so he sunk with the ship and the grinding mill still makes salt even today cause noone said the magic words to make it stop.
2007-02-05 05:01:34
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answer #4
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answered by ParaskeveTuriya 4
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sea water contains a wide variety of minerals.. in it..
hence it is salty....
2007-02-05 05:03:07
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answer #5
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answered by Jai 3
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Well, it's because it has salt in it.
Although it may sound like it, this is not a sarcastic answer. It's just the way it is.
2007-02-05 04:56:10
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answer #6
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answered by Anonymous
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mineral with rain water
2007-02-05 05:10:41
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answer #7
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answered by ranganath gangannagmhalli 2
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Due to mixing of ion.
2007-02-05 04:57:27
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answer #8
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answered by rajiv s 1
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condensation or evaporation from rain and sun mixed together
2007-02-05 04:55:26
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answer #9
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answered by diva 6
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check this site
2007-02-05 04:56:44
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answer #10
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answered by upallnight 4
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