Why sea is saline?

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. read more

washings to the sea. Some of the ocean's salts have been dissolved from rocks and sediments below its floor. Other sources of salts include the solid and gaseous materials that escaped from the Earth's crust through volcanic vents or that originated in the atmosphere. read more

These ions are not enough to make river saline. When river flows into ocean these ions get deposited in ocean. The sea water gets evaporated, leaving the ions behind. And the process keeps on repeating, hence more and more ions get deposited in sea making it saline. read more

The salt stays in the sea because no water flows out of the sea. When seawater evaporates to form clouds, almost all of the salt stays behind. The left-behind salt accumulates to become salty. read more