Question

write an experiment to prove that the rate of evaporation of a liquid depends on its surface area and vapour already present in surrounding air

Answer 1

the question is not clear

Answer 2

Raising the temperature of water builds the kinetic energy of surface particles, hurrying the rate of evaporation. Moving air channels immersed air far from the fluid, successfully bringing down concentrations of water and different substances in the nearby air. 

Evaporation is a sort of vaporization of a fluid that happens from the surface of a fluid into a vaporous stage that is not immersed in the evaporating substance. The other sort of vaporization is bubbling, which is described by rises of soaked vapor shaping in the liquid stage.

If you look at the attached picture there is evaporation taking place the water is being converted into gas or vapor.

And then there is a rain or snowfall again the gas state is changed into water vapor through rain and snowfall.