Q. 6 A3.8( 70 Votes )

Explain the following:

What is the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?

Answer :

The behavior of water between its temperature from 0° C to 4°C is called anomalous behaviour of water.


Role of anomalous behaviour of water in preserving aquatic life:


(i) In winter, as the temperature of the atmosphere goes down due to which the water of the surface also cools down.


(ii) As a result, the temperature of whole water body decreases to 4°C.


(iii) Now, as water on the surface at 4° C cool down further, its volume increases and density also increases.


(iv) On reaching the temperature at 0° C, water transforms into ice.


(v) The process of cooling becomes slow due to the low thermal conductivity of ice (ice bad conductor of heat).


(vi) Thus, a temperature of 4° C is always maintained.


(vii) In normal conditions, the temperature goes on increasing.


(viii) This whole process preserves the aquatic life even in cold regions.



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