23 minutes ago
Though it may vary, in average for every Kilogram/litre of seawater, there's 35g of salt. If we were to gather all the salt in seas n oceans, the mass would be almost as big as the moon! 😮 If we spread it evenly over the earth's land surface, some estimate that it would be as thick as 40 storey building (a layer of 166m thick). Damn! That's sick.
Why is seawater salty anyway?
Apparently, salt in the ocean comes from rocks on land. Well most of it anyway, some from submarine volcanic eruptions too. The rain is slightly acidic due to CO2 in the air (carbonic acid). It breaks down the rock creating ions that gets carried away thru streams and rivers to the ocean. Majority of these ions are sodium n chloride which are salty. These ions are consumed by organisms n removed from the ocean but the leftovers over long period of time concentrates; thus making the water salty.
When water evaporates, salt is left behind so over millions n billions of years this went on; making seawater salty. Now there are some lakes which are salty n some are not. It's because some have just inlets whereas some have inlets n outlets so go figure.
The big question is, does this mean the water will get even more saltier with time? Answer is NO. It has reached a balance level for past millions of years...the concentration hasn't changed. It's because new minerals are forming on the sea floor at the same rate as salt is added. Thus, the salt content of the sea is at steady state. And that's all folks!
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