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Give reasons for the following: Even when the water in the lakes is frozen, fish can survive. - Physics

Short Note

Give reasons for the following:

Even when the water in the lakes is frozen, fish can survive.

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Solution

Even when the water in the lakes is frozen, fishes can survive due to anomalous expansion of water, water has maximum density at 4°C and this dense water remains at the bottom of the lake and the upper layer of water is less dense and freezes but the temperature of each layer of water below increases by 1°C. Thus it is warmer in the lakes below the ice layer. This helps the fishes to survive.C and this dense water remains at the bottom of the lake and the upper layer of water is less dense and freezes but the temperature of each layer of water below increases by 1°C. Thus it is warmer in the lakes below the ice layer. This helps the fishes to survive.

Concept: Reactivity of Metals with Cold Water, Hot Water and Steam (With Products Formed).
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APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Thermal Expansion | Q 9.4 | Page 202
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