What are some fast facts about salinity?

Question

im doing a science project. its how salty is salt water and i jus wanted to kno some fast facts about salinity.

Answer 1

Global average ocean salinity is 3% to 3.5% by weight, meaning 3 to 3 and a half grams of dissolved salt per litre.

Ocean water freezes at a slightly lower temperature than fresh water, typically -2 degrees Centigrade. There are plenty of places which are still cold enough for that. During World War 2, one of the greatest dangers to the convoys taking supplies to Archangel (Russia's port on the Arctic Ocean) was wind-blown seaspray freezing on the ship's masts and upper structure. When this salty ice started building up faster than the crew could chop it off with axes, the ship was doomed - it would become top-heavy, turn completely over, and be lost with all hands.

Answer 2

Facts About Salinity

Answer 3

What sea are you asking approximately? Perhaps you imply the oceans? Some SEAS - just like the Dead Sea have become saltier. Some polar seas have become much less saline for the reason that of ice soften related to international warming. The oceans stay particularly regular of their salinity through the years . Some version happens for the duration of glacial a while and interglacial a while. Many can let you know how the oceans get their salt inflow, but when the salinity stays lovely regular, how do they lose the salts? When waves holiday or white caps are blown, the ocean spray sends tiny drops of saline water into the air in which they evaporate. This leaves a tiny salt crystal to drift within the air. These act as hygroscopic nuclei which can be fundamental within the formation of raindrops. The rain falls again to Earth in which the salt water can go back to the seas/oceans. Any international alterations within the normal salinity of the oceans will take location over a long time. Surely such a lot marine lifestyles will adapt to the replacing environs as they have got for regularly ago.

Answer 4

Loads of facts here.
http://www.creationontheweb.com/content/view/578/

Interesting fact: The salinity of the sea is good evidence that the earth is not old. If it were 4.5 billion years old then the seas would be many many times more salty than they are.

This excerpt comes from the link above.

Many processes bring salts into the sea, while they don’t leave the sea easily. So the saltiness is increasing steadily. Since we can work out how much salt there is in the sea, as well as the rates that salts go into and out of the sea, we should be able to calculate a maximum age for the sea.

In fact, this method was first proposed by Sir Isaac Newton’s colleague, Sir Edmond Halley (1656–1742), of comet fame.2 More recently, the geologist, physicist, and pioneer of radiation therapy, John Joly, (1857–1933) estimated that the oceans were 80–90 million years old at the most.3 But this was far too young for evolutionists, who believed that life evolved in the ocean billions of years ago.

More recently, the geologist Dr Steve Austin and the physicist Dr Russell Humphreys analyzed figures from secular geoscience sources for the quantity of sodium ion (Na+) in the ocean, and its input and output rates.4 The slower the input and faster the output, the older the ocean could be.

Every kilogram of seawater contains about 10.8 grams of dissolved Na+ (about 1% by weight). This means that there is a total of 1.47 x 1016 (14,700 million million) tonnes of Na+ in the ocean.