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As humidity is dependent on temperature, wind and other factors, these factors affect evaporation too. There are a multitude of factors, including relative humidity, that govern the process of evaporation whether it is occurring at a small laboratory or over the surface of a huge water body like a lake or ocean.
The sun powers the water cycle. It knocks water off the ocean surface into the atmosphere, providing the energy of evaporation. The sun also creates wind via differential heat â¦ ing of earth's crust, which makes areas of low and high air pressure. This causes the movement of moisture laden air over land masses.