The process where liquid water turns into vapour, apparently disappearing. e.g. a rain puddle may evaporate when the sun comes out - it is the opposite of 'condensation'.
Evapotranspiration:
The loss of water to the atmosphere as a result of the combined effect of evaporation and the transpiration of plants.
Exosphere:
The outermost layer of the Earth's atmosphere.
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Evaporation: