The sea water approximately the Antarctic continent is always really cold. It have the right to be as cold as -2°C.The sea water around the equator have the right to be an extremely warm. For instance the sea temperature approximately the Persian Gulf deserve to be as warmth as 36°C.

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The median temperature of the sea is around 2°C. The average surface temperature is around 17°C.

Cold water is much more dense than warm water

Cold water is heavier or much more dense than warm water. That method that cold water will sink below warm water.

Watch this video clip demonstration

that shows cold water sinking below warm water.


Salinity is a measure of exactly how much salt there is in water. Ocean water has a salinity of about 3.5% salt. That means that in a 100gm systems of salty water, there is 3.5 grams the salt. Or, put an additional way, one litre that seawater consists of 35 grams the salt - that is approximately 6 teaspoons.

About 90% the sea salt is sodium chloride or table salt. The various other salts are consisted of of chlorine, sodium, magnesium, sulphur, calcium, and potassium. (see image)

Salt water is much more dense than fresh water

Salt water has more stuff in it than fresh water. The stuff would be the salt, which renders the mass of water greater, without including much come its volume. 

Density = mass/volume. Enhancing the mass by including salt rises the density. 

density of new water is 1gm/mldensity that sea water is 1.025 gm/ml

Seawater is a little bit more dense 보다 fresh water therefore it sinks beneath freshwater. This means that as soon as rivers flow out right into the sea the flow freshwater floats on top of the sea water. But when the wind blows and also the sea i do not care rough, the two waters obtain all combined up.

What happens as soon as seawater freezes?

The winter in the Arctic and the Antarctic are extremely cold. The surface waters that the Arctic and Antarctic seas become really cold and also finally freeze.

When seawater freezes to type sea ice, salt is squeezed out and also moves down right into the water. This means that sea ice cream is made up of greatly fresh water. The water just below the sea ice cream is saltier and much more dense than the water below. Because it is more dense, that sinks. The water the sinks is changed by surface ar water the comes from areas closer to the equator wherein it is warmer.

The cold, salty water sinks to type an ocean current that move deep underwater towards the equator. The surface ar water the replaces the sinking water creates an ocean existing that moves from the equator towards the Arctic and Antarctic.

So, ocean currents are formed due to the fact that dense water (cold and also salty) sinks.

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A demonstrate that warm water floats on optimal of chillier water. Photo source.

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Salt in seawater. Photo source

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Antarctic sea ice cream is consisted of of mainly fresh water. The salt has actually been squeezed out, and also sinks into the sea below. Image dearteassociazione.dearteassociazione.org