what is the approximate average depth of the oceans?
There are so many different depth levels of the ocean, it is pretty much impossible to calculate the average depth unless every part of the ocean is measured. Update: The average is 3,700 meters. Wikipedia gives the average depth of the World Ocean (that's taking all the Oceans as one continuous body of water) as 3,790 metres (12,430 ft),
Answer All oceans have salt in them. The average salinity of all oceans is 35 parts per thousand. Salinity does vary according to depth and location. Areas of the ocean located near onshore river runoff typically have a lower salinity. Areas near the tropics with high evaporation rates tend to have higher salinity.