Question

if sea water is rain water than why rain not salty

Answer 1

Snow is not salty as salt doesn't evaporate with water. ... Salt in theocean comes from rocks on land. Therain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes therainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water)

Answer 2

The evaporated water goes upwards, as salt cannot be evaporated it does not goes with water .although salt is soluble by cannot be evaporated.