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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.
Lesson Summary. Evaporation is a process during which water in a liquid state changes to gas or vapor. Water starts evaporating at 32 degrees F (0 degrees C), but it happens very slowly. The higher the temperature, the higher the rate of evaporation; however, evaporation cannot occur if there is no water available.