Air that is ___________ has 100% relative humidity.

Air that is saturated has 100% relative humidity because it contains the maximum amount of water vapor that it can hold at a given temperature. When air reaches this point, it cannot hold any additional moisture without condensation occurring, which can lead to the formation of dew, fog, or precipitation.

Relative humidity is a measure of the current amount of moisture in the air compared to the maximum amount that the air can hold at that temperature. Therefore, when air is saturated, it indicates that the air is fully "loaded" with moisture, resulting in a relative humidity reading of 100%.

In contrast, damp air may have high humidity, but it does not necessarily mean it has reached saturation. Dry air, as the term suggests, has a lower moisture content and, consequently, a relative humidity of less than 100%. Condensed air refers to moisture that has transitioned from a vapor to a liquid state, which implies that the air is no longer in its gaseous form at maximum capacity. Thus, the definition of saturated air aligns directly with the concept of 100% relative humidity.