How is relative humidity defined?

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Multiple Choice

How is relative humidity defined?

Relative humidity is the percent of water vapor in the air compared to the maximum amount the air could hold at the current temperature. It’s a ratio to saturation, not the total moisture by itself. Temperature sets the air’s capacity: warmer air can hold more water vapor, so the same amount of moisture yields a lower relative humidity, while cooling the air raises relative humidity toward 100%. For example, if the air contains half as much water vapor as it could at that temperature, the relative humidity is about 50%. This concept matters because when RH nears 100%, condensation, dew, fog, or clouds can form.

Relative humidity is the percent of water vapor in the air compared to the maximum amount the air could hold at the current temperature. It’s a ratio to saturation, not the total moisture by itself. Temperature sets the air’s capacity: warmer air can hold more water vapor, so the same amount of moisture yields a lower relative humidity, while cooling the air raises relative humidity toward 100%. For example, if the air contains half as much water vapor as it could at that temperature, the relative humidity is about 50%. This concept matters because when RH nears 100%, condensation, dew, fog, or clouds can form.

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