How do aquatic animals survive in frozen lakes?

Website on Information about How and Why's of Plants and Animals/></p>
<blockquote><p><strong>How do aquatic animals survive in frozen lakes?</strong></p></blockquote>
<div style=Website On Information About How and Why's of Plants and Animals

Free Information and News About Plants and Animals

Aquatic animals and their survival in frozen lakes

Generally all liquids expand on heating but water is an exception.At 0c if water is heated gradually its volume decrease and this contraction continues till the temperature rise to 4c. Above 4c water starts expanding and keeps on expanding with further rise in temperature. This shows that at 4c the volum occupied by a given mass of water is minimum. In other words the density of water at 4c is maximum. This irregular expansion of water is known as anomalous expansion. In cold countries during winter when the atmospheric temperature is very low the upper layers of water in the lakes and ponds starts cooling. When the temperature of the surface layer falls to 4c the water acquires maximum density and sinks down. The lower layer of water then rise up. This water also gets cooled to 4c and again sinks down.

frozen lakes

The process continues till the freezing of the whole water fall to 4c. As the tem falls below 4c the density of water decrease and as a result at the surface becomes lighter and does not sink down. The surface water finally freezs while the lower layer remain at 4c as ice is a bad conductor of heat freezing in the lower layer is a very slow pprocess. Thus underneath the frozen layer fish and other aquatic animals and plants survive. Had the expansion of water been uniform the lakes or ponds would have been completely frozen or along with the aquatic plants and animals. In this situation no plant and animals. In this situation no plant and animal would have survived.

Free Information and News About Plants and Animals

Free Information and News about India

Free Information and News about India

Related Posts