Multiple choice

In which of the following situations is the anomalous expansion of water beneficial?

  1. Cooking of food in a pressure cooker

  2. Freezing of water in a refrigerator

  3. Freezing of water bodies in cold areas

  4. Evaporation of water from the surface of water bodies

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ice formed at the surface of water bodies protects the water beneath from the cold air above. Thus, the warmth of water below the layer of ice is preserved and not dissipated to the atmosphere.