ses come from the atmosphere. As water is a universal solvent, many different compounds are dissolved in it. A 1kg sample of saltwater contains 35g of dissolved compounds, including inorganic salts, organic compounds from living organisms, and dissolved gasses. The amount of salt in more than 95 percent of the worlds oceans normally averages about from 33 to 37 parts per thousand, with and average of 35 parts per thousand. The northern subtropical portions of the Atlantic Ocean are very salty. They are at least 37.5 parts per thousand. The Pacific Ocean is less salty (34 ppt), and the arctic and Antarctic oceans art the least salty. The water is usually less salty where large amounts of freshwater are supplied by melting ice, rivers, or rainfall. The saltiest water is found in waters where there is a minimum of rainfall or river runoff, and a lot of evaporation. For example, the Persian Gulf and the red sea hav
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