[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about atmospheric processes involving air pressure, air density, and temperature. Includes a few questions to check for understanding.

An introduction to the factors that affect the Arctic's weather and climate: latitude, land/sea distribution, solar radiation, air temperature, air pressure, winds, humidity, clouds, and precipitation.

Describes what dew point is and how it relates to moisture content of the air. Also explains condensation and relative humidity.

Use this site to learn about basic gas properties including motion, viscosity, and compressibility. Includes links to activities for all ages.

This site provides an extensive amount of weather information. Includes current information, forecasting, and historic weather related events. Weather map symbols and terminology explained.

A calculator that computes air density if altitude, temperature, humidity, and barometric pressure are known.