What unit is commonly used to express humidity levels?

What unit is commonly used to express humidity levels?

• A. Relative Humidity (RH) / percentage
• B. Degrees Celsius
• C. Pascal
• D. Oktas

Answer: (A)

Humidity is most often described using relative humidity, shown as a percentage. Relative humidity is a ratio: it compares how much water vapor is actually in the air to how much water vapor the air could hold at that temperature before becoming saturated. Since warm air can hold more moisture than cold air, using a percent at the current temperature gives a consistent, comparable measure of how humid the air feels. For example, 60% RH means the air holds 60% of the moisture it could contain at that temperature. Other options aren’t units for humidity: degrees Celsius is for temperature, Pascal measures pressure, and Oktas refers to cloud cover.

Humidity is most often described using relative humidity, shown as a percentage. Relative humidity is a ratio: it compares how much water vapor is actually in the air to how much water vapor the air could hold at that temperature before becoming saturated. Since warm air can hold more moisture than cold air, using a percent at the current temperature gives a consistent, comparable measure of how humid the air feels. For example, 60% RH means the air holds 60% of the moisture it could contain at that temperature. Other options aren’t units for humidity: degrees Celsius is for temperature, Pascal measures pressure, and Oktas refers to cloud cover.