What are the salt levels in oceans?

Answer 1

97% for salt water, and 3% for fresh water in ocean water

Answer 2

Well, the salt levels in the oceans have changed due to global warming which has lead to different weather patterns on land. But the "saltiness" (a.k.a. salinity) is usually different in different oceans. For example, in the subtropical zone, salt has increased to a level outside natural variability over the last 20 years. However, in the North Atlantic, an increase in salt levels was put down to natural variation. So really the salinity (salt) levels of the oceans are always changing!

Answer 3

Just as salt lowers the freezing point of water, it also raises the boiling point as well.

The boiling point of water depends on pressure: very deep water at hydrothermal vents on the ocean floor can be 400 degrees Celsius, and yet water can boil at only 70 degrees Celsius at the top of Mount Everest. Assuming sea level, the boiling point would be approximately 103 degrees Celsius (rather than the normal 100 degrees for pure water), at least according to the information in this source: http://ijolite.geology.uiuc.edu/02SprgClass/geo117/lectures/Lect15.html

Answer 4

The Atlantic Ocean is the saltiest major ocean. The salinity is about 33 to 37 parts per thousand by mass. It varies with season, precipitation, and evaporation.

Answer 5

approximately 3%

Answer 6

how come no one know