Answered

What statement about the salinity of ocean water is true?


A.) The salinity of seawater decrease as one moves from the surface to the depths of the ocean.


B.) The salinity of surface ocean water does not change from latitude to latitude.


C.) An increase in the concentration of salts in ocean water will increase its density.


D.) The salinity of ocean water is lowest near the surface of the ocean.

Verified Answer :

AlexSable

An increase in the concentration of salt in the ocean water will increase it's density because more salt has to be concentrated in the same space as before.

Option (c) is correct. The increase in the salt concentration results in the higher density of the ocean water.


Further Explanation:

Almost \(70\%\) of the earth’s surface is covered with water. The water is mostly present in the oceans and in some parts it is in the form of running water in the rivers. The oceans are salty due to the presence of the dissolved ions.


The salty nature of the oceans is also due to the ions carried by the rain water and other form of running water on the surface of the Earth. The amount of salt present in the ocean water in a particular region varies as compared to the other.


This variation in the concentration of the salt in the water leads to the variation in the density of the ocean water because if the concentration of the salt is low, then less amount salt is present in unit volume and therefore it has less density whereas if the concentration of the salt is more, it will lead to the higher density of the ocean water.


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Answer Details:

Grade: Middle School

Chapter: Oceans

Subject: Physics


Keywords:
 Salinity, concentration, salts, ions, dissolved, depth of ocean, increase its density, salinity, water, variation.

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