what causes salinity in oceans and seas?



  1. 0 Votes

    Every year, rivers wash about 4 billion tons of salts into the ocean, typically in the form dissolved rocks or other sediments from land. This builds up over geological time, and is amplified by the fact the sun’s heat evaporates pure water from the ocean into water vapor, but leaves much of the heavier salt behind. 

  2. 0 Votes

    by evaporation evaporating the water and not the salt

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