The density of seawater dram a vital role in resulting in ocean currents and circulating heat due to the fact that of the reality that dense water sinks listed below less dense. Salinity, temperature and also depth all influence the thickness of seawater.

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Density is a measure of exactly how tightly a certain amount of issue is packed right into a given volume. The an ext the stuff is pack in, the greater the density. Thickness can be calculated by separating an object’s massive by that volume. It is commonly measured in grams per millilitre or grams every cubic centimetre.

For example, basalt is a really dense rock through an typical mass of approximately 3 g/cm3 however it is still no as thick as element iron, with a massive of almost 8 g/cm3.


Seawater is not just water – it has lots of chemicals packed into it. This method it is denser than pure water. The greater the salinity, the greater the density.

Variation in density

Seawater density varies from ar to place because it is impacted by salinity and also temperature. This method that pearl float higher or reduced in the water, relying on the density of the ocean. If friend look near the waterline that a cargo ship, you should find the worldwide Load Line, once called the Plimsoll Line. This reflects the limit of wherein the fully loaded ship need to sit in waters of different densities.


High salinity makes water denser. This is since there is an ext salt packed right into the water.

High temperature makes water less dense. Together water gets warmer, that is molecules spread out, so the becomes less dense. Together it it s okay colder, it i do not care denser. Many chemicals obtain denser as soon as they turn from a liquid to a solid, yet water is different. When liquid water freezes into solid ice, it becomes much less dense. When ice forms, water molecule arrange themselves right into a rigid yet open pattern. This framework is less thick than the liquid water, so ice cream floats.

Deep water is denser 보다 shallow water. The water molecules room packed together an ext tightly since of the weight of water above pushing down.


Dense water sinks listed below less dense water. This is the principle that drives the deep s currents the circulate around the world. A combination of high salinity and also low temperature near the surface makes seawater thick enough to sink into the deep ocean and also flow along the bottom of the basins. Discover out more in this article Ocean motion.

In this activity, student are introduced to the ide of density. They calculation the volume of various materials to determine and also then rank their densities.

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