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The seas gain salt in a number of ways, the rivers taking dissolved salt from the rocks down to the sea, where it as to stay as no water runs out of the sea, and as the water in the oceans evaporates the salt is left behind and the ocean making the ocean saltier still, however this happens at an extremely slow rate and is like adding a few grains of salt to a pint of water every 100 years.
The seas are around 3% salty although this has been known to go as high as 3.08% to as low as 2.91% due to other factors. The sea will get saltier over time however there are also ways in which salt is removed from the oceans. All creatures need salt to live and they remove salt from the ocean this way, and when they die their bodies get locked up in the sedimentary rocks. Also the sea water reacts with sea rocks leaving behind salt this way.
Finally the massive plates that float on the Earth's mantle are constantly moving, when an ocean plate collides with a less dense continental plate then the continental plate will float over the top and the ocean plate will lose a large amount of its minerals deep into the earths crust.
Over recent years the salt in the sea has risen by a tiny fraction of a percentage every year, however scientists believe that this will slowly even its self out over hundreds and thousands of years.
What else can I help you with?
What is salinity used in a sentence?
The salinity of the ocean was much higher than I thought it would be.
How much salinity present in Pacific Ocean?
The salinity varies latitudinally. It's somewhere between about 3 and 5%.
How much salt in is a cup of ocean water?
There is 3.5% salinity of salt in one gallon of ocean water. Now you divide that by 16, which is 0.21875. So there is 0.21875% salinity of salt in one cup of ocean water. Mathematics can really pay off!!! Good for you if you were interested in the salinity of salt in one cup of ocean water!!!:) :) :) :) :) :) :) :) :) :)
What is the salinity of the Great Salt Lake?
The salinity of the Great Salt Lake varies, but is on average about 12%.
What is the difference between fresh water and ocean?
Ocean water has a higher salinity (salt content) than fresh water does.
List the reasons for variations in salinity in the various oceans?
Salinity can vary because of water temperature, rivers emptying into the ocean and mixing with ocean water, ice forming or melting, evaporation and precipitation. I think temperature is the biggest reason.
How much salt is in the ocean water?
The oceans are about 3.5% salt (by weight). Salinity is generally reported in terms of parts per thousand (abbreviated o/oo), the number of pounds of salt per 1,000 pounds of water; the average ocean salinity is 35 o/oo.
Why does salinity vary in different parts of the world ocean?
salinity of ocean water depends upon many causes,but the main cause is continuous movement of ocean water from one place to other due to rotation of earth nd winds which takes water here nd there causing change in salinity of ocean water
How much saltier is ocean water than your blood?
On average, seawater in the world's oceans has a salinity of about 3.5% The salinity of human blood is 0.9%. So sea water is roughly 3.5 times as salty as blood.
How does salinity affect the density of the ocean water?
Dissolving salts in water increases the density slightly. Ocean waters have an average density about 2.5% greater than fresh water. The Dead Sea has a much higher density, somewhere roughly near 20% greater than fresh water due to its 30% salinity level.
How much salinity is in fresh water?
I don't know how much salinity is in fresh water.
How much salt per gallon of sea water?
The average ocean or sea has a salinity of about 3.5%. In metric, about 35 grams per liter.
