Question

Why does water in ponds changes from liquid to vapour with reaching the boiling point??

Answer 1

bcoz the atmospheric temperature acts and the water boils to evaporate

Answer 2

The water of the pond is constant in a particular area.It doesn't move.When the sun shines brightly it heats the upper surface of water as well as earth's surface.when the temperature increases upto boiling point it changes water into vapour form as its common phenomenon that heating water at 100°C it changes from liquid state to vapour state.

Hope it's helpful !