Question

What is transpiration? How will you show the presence of water vapour in the air?

Answer 1

Transpiration is the process of losing water from the surface of the leaf through stomata. Transpiration helps a plant in cooling the leaves and transporting the nutrients.
First, take a clean glass and put some ice cubes in it. After some time, small droplets of water can be observed on the outer surface of the glass. This is because water vapour in the air comes in contact with the cold surface of the glass and condenses. These droplets of water are due to the condensation of water vapour present in the air.