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Answer Posted / satish
Water always contains dissolved solids with solution. These
may have been picked up from a variety of sources. As it
evaporates during it's cycle, the evaporated wate leaves
behind the dissolved soilds in the solution. The sea being
the largest water body, has to therefore hold these salts
left behind due to evaporation. This is a "concentration
mechanism". So the salt content ceaselessy build up in the
sea.
Other water bodies, like rivers, are not salty because they
are flowing. Flowing results in dilution as well, so
salinity does not build up in rivers.
Lakes receive inputs from rivers so the salinity is diluted.
water
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