Dew point temperature is the temperature at which air becomes saturated; when air cools to the dew point, dew or fog forms.

Study for the METRO (Meteorology) – VT-10 Test. Enhance your knowledge with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam today!

Multiple Choice

Dew point temperature is the temperature at which air becomes saturated; when air cools to the dew point, dew or fog forms.

Dew point is the temperature to which air must be cooled, at a given amount of water vapor, for the air to reach saturation. When air is cooled to this temperature, the water vapor can no longer be held as vapor and begins to condense into liquid, forming dew on surfaces or fog in the air. This definition directly ties the dew point to the air’s existing moisture content and explains why condensation occurs at that temperature. It’s not the temperature at which air holds its maximum water vapor, because the air’s capacity to hold water vapor depends on temperature; the dew point refers to the threshold where the current vapor content becomes saturated. It’s also not a measure of dryness or of rain evaporation.

Dew point is the temperature to which air must be cooled, at a given amount of water vapor, for the air to reach saturation. When air is cooled to this temperature, the water vapor can no longer be held as vapor and begins to condense into liquid, forming dew on surfaces or fog in the air. This definition directly ties the dew point to the air’s existing moisture content and explains why condensation occurs at that temperature.

It’s not the temperature at which air holds its maximum water vapor, because the air’s capacity to hold water vapor depends on temperature; the dew point refers to the threshold where the current vapor content becomes saturated. It’s also not a measure of dryness or of rain evaporation.

More practice questions