2. Humidity Specific Humidity = The actual amount of water vapor in the air at a given time and place. Relative Humidity = How near the air is to its maximum capacity for holding water vapor. Saturation = when there is so much water vapor in the air that the rate of condensation equals the rate of evaporation.

3. Humidity Warmer air = able to hold more water vapor Cooler air = able to hold less water vapor

4. R elative Humidity = Specific Humidity x100% Maximum Capacity

11. Dew Point The temperature at which saturation occurs and condensation begins.

14. Dew vs. Frost Dew = Condensation Air Temperature > 0°C Frost = Deposition Air Temperature < 0°C