The _________ temperature is the temperature to which air must be cooled to become saturated with water vapor.

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Dew point is the temperature at which air must be cooled to become saturated with water vapor. At a given pressure, air contains a certain amount of water vapor, and cooling lowers the air’s capacity to hold that vapor. When the air reaches the dew point, the vapor pressure equals the saturation vapor pressure and condensation begins. This temperature directly reflects how much moisture is in the air—the higher the dew point, the more moisture present. Relative humidity, by contrast, is a percentage showing how close the air is to saturation at the current temperature, not the temperature needed to reach saturation. Dry-bulb temperature is simply the actual air temperature, not the saturation threshold. Enthalpy is the total heat content of the air–vapor mixture, not the point at which condensation occurs.