Question

The air temperature is 70 degrees, and the relative humidity is 90%. What conclusion can be made? • The dew point is 90% of the air temperature.
• The amount of water vapor in the air is 90% of what the air can hold.
• The temperature must rise in order for air to become saturated with water vapor.
• The air holds little water vapor and is relatively dry

Answer 1

Given that the air temperature is 70 degrees and the relative humidity is 90%, the most accurate conclusion is:

- **The amount of water vapor in the air is 90% of what the air can hold.**

Relative humidity indicates how much moisture the air contains compared to the maximum it can hold at that temperature. A relative humidity of 90% means the air is nearly saturated with water vapor.