Dew

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Dew

Dew (/djuː/; from Old English dēaw) is the condensation of atmospheric water vapor into droplets on surfaces, typically occurring overnight.

Etymology

The term "dew" originates from the Old English word dēaw. It is related to the Dutch dauw and German Tau, both of which also mean "dew".

Definition

Dew is a type of precipitation that forms when the air temperature drops and the relative humidity reaches 100%. It is typically seen in the early morning or late evening. Dew forms on surfaces that are cooler than the surrounding air, such as grass, leaves, and cars.

Related Terms

  • Condensation: The process by which water vapor in the air becomes liquid water. Dew is a form of condensation.
  • Humidity: The amount of water vapor in the air. High humidity can lead to the formation of dew.
  • Precipitation: Any product of the condensation of atmospheric water vapor that falls under gravity. Dew is a type of precipitation.
  • Dew Point: The temperature at which dew begins to form. It is a measure of atmospheric moisture.
  • Frost: Frost is formed in the same way as dew, but at temperatures below freezing.

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