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Why is the sea salty?

Why is the sea salty?
Ben Hadfield (Age 5-14)

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One Response

  1. Basically, because organic and inorganic salt minerals of various kinds are leached by water from the soil and rocks of the earth. The water flows through the landscape, both underground and in streams and rivers and eventually reaches the seas and oceans (except in cases of land-locked lakes). Salts that are not dissolved and thus transported by water are, of course, locked in the land (e.g. salt flats or mines). As there is no other place for the salt minerals to go once they reach the sea, except by evaporation back into the atmosphere, then back to earth as rainfall/snowfall, the salt remaining in the sea makes it taste salty to human taste buds.

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