Question

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

Answer 1

Answer:

The anomalous behaviour of water is that from 0°C to 4°C it contracts and beyond 4°C it expands. So the density of water is at a peak at 4⁰C. However when the surrounding temperature goes down, the water in the oceans and rivers also cools down and the temperature of the whole water reaches 4⁰C. The water, therefore, reaches it's maximum density at this temperature. Below this temperature (4⁰C), the water layer on the surface expands caused by anomalous behaviour of the water because of it's decrease in density. Hence, this colder layer remains on top and converts into ice. This ice acts as an insulator and does not allow the temperature of the water layer below it to fall below 4°C. This ensures that a liveable temperature is maintained for aquatic life under the oceans and rivers.

Answer 2

Answer:

YOUR ANSWER IS GIVEN BELOW

Explanation:

--------->

1. In cold countries during winter, the temperature of air falls to 0°C or even below.
2. As the temperature of air decreases, the water at the surface of the lake begins to contract due to which its density decreases.
3. When the temperature of the water falls below 4°C, due to its anomalous behaviour, the water expands instead of contracting.
4. As the temperature of water falls to 0°C, the water on the surface of the lake gets converted to ice.
5. Since ice is a bad conductor of heat the water below the ice layer continues to remain at 4°C even though the temperature of air may fall below 0°C.
6. Hence, due to anomalous behaviour of water, aquatic animals stay alive when the temperature of air falls below 0°C.

HOPE IT HELPS YOU DEAR..........