Multiple choice

Why is the water in a pond cool even on a hot day?

  1. Surface water goes on evaporating taking heat from the water so water becomes cooler

  2. The surrounding earth of the pond absorbs the heat of the water

  3. Water cannot be heated from surface downward

  4. None of the above

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

Water on the surface of a pond continuously evaporates. Since evaporation is an endothermic process that absorbs heat from the water, it lowers the overall temperature of the pond.