Question

12. Aquatic animals are able to survive in the water bodies like rivers and oceans during winter when the atmospheric pressure is -10⁰C. This is because

• A. density of ice is less than water
• B. density of water is minimum at 4⁰C
• C. ice is a poor conductor of heat
• D. Both A and B

Answer 1

The correct option is D

Both A and B

Explanation for correct option:

(A) Density of ice is less than water

Aquatic organisms are able to survive in lakes during winter even though there is ice at the surface. This is because the density of ice is less than that of water. Density of ice = 0.9168g/cm³

(B) Ice is a poor conductor of heat.

Ice is a poor conductor of heat means it acts as isolated it cannot transfer the heat under temperature to the top layer. So, that's why aquatic animals can live under the layer of ice in the water

Hence D will be the correct option.