Why Sea Water Is Salty?

when you happen to taste sea water you immediately tend to spit it over feeling so salty,and you might have wondered why sea water alone is salty while other nature given water such as river,pond or rain water are not so. the reason is that the sea gets water from the rivers that are flowing in or from rain. the water thus pour in contains some amount of salt in it because chemically speaking water is universal solvent because of it^s peculier ph value and therefore mostly everything in nature gets dissolved in water and as a result of thus explained reason the river water that flows from mountain to sea on it^s long journey dissolves everything on it^s long way and becomes some what salty to a lesser extend when it reaches sea.Thus the sea seawater gets somewhat salty river water year after year, and on the other hand due to Sun^s heat and evaporation the pure water alone gets  evaporated leaving behind the salt dissolved in it and therefore the sea water becomes more and more salty as the years goes by and the earth  at present is so many millions of years are old and this long period is the reason that the sea water is too much salty.