Which is TRUE as the temperature of an air...

🔍 Key Concepts

• Relative humidity vs. temperature – how full the air is compared to how much moisture it could hold at that temperature • Specific/absolute humidity – how much actual water vapor (mass) is in a given mass/volume of air, regardless of how cold or warm it is • Dew point – the temperature at which air becomes saturated and condensation begins

💭 Think About

• If you cool an air mass but do NOT add or remove water vapor, what happens to how close it is to saturation? • Which humidity terms depend on the actual amount of water vapor present, and which depend on the capacity of the air to hold moisture? • When temperature drops toward the dew point, what generally happens to relative humidity and to the difference between air temperature and dew point?

✅ Before You Answer

• Be clear on the definition of relative humidity (a percentage comparing actual water vapor to the maximum possible at that temperature). • Recall whether specific humidity and absolute humidity change when only temperature changes but the total water vapor content stays the same. • Confirm whether the dew point changes just because temperature changes, if the water vapor content of the air mass stays constant.

Which is TRUE as the temperature of an air mass decreases?

The relative humidity increases

The specific humidity decreases

The absolute humidity decreases

The dew point rises

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🔍 Key Concepts

💭 Think About

✅ Before You Answer