How do oceanographers denfine salinity a. number of grams of mineral salt per liter b. number of grams of dissolved sulfur salt per kilogram of water c. number of milligrams of dissolved sodium chloride per milliliter of water d. number of grams of salt per kilogram of water

 Ocean salinity is generally defined as the salt concentration (e.g., Sodium and Chlorure) in sea water. It is measured in unit of PSU (Practical Salinity Unit), which is a unit based on the properties of sea water conductivity. It is equivalent to per thousand or (o/00) or to g/kg.

The correct answer would be b) volume versus temperature, because they are also directly proportional.