Tuesday, March 8, 2011

Science:Factors that affect Rate of Evaporation


Rate of evaporation indicates how fast or slow evaporation is taking place.

Factors affecting rate of evaporation: temperature, presence of wind, area of exposed surface and humidity(in the air).



Temperature
The temperature of the water and its surroundings affect the rate of evaporation.
The higher the temperature, the faster the rate of evaporation.

Presence of wind
When water evaporates, the water vapour it forms usually collects just above the water surface.
When wind blows, it takes away the water vapour and creates space for more water vapour to form.
The stronger the wind, the faster the rate of evaporation.

Area of Exposed Surface
The area of exposed surface=the area of water that is exposed to air.
Water vapour goes into the air from this surface.
Humidity of The Air
Humidity is the measure of the amount of water vapour in the air.
The lower the humidity of the air, the faster the rate of evaporation.

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