NASA
Write the Book on Weather Metrics
It's not easy to measure the weather. Pupils learn about what all weather has in common—the atmosphere. Scholars discover how a meteorologists must be able to measure aspects of the atmosphere and decipher the data. They then create a...
University of Illinois
University of Illinois Extension: Ww2010: Atmospheric Pressure
This site from the University of Illinois describes what air pressure is and how it is measured. Explains high and low pressure areas, isobars, and how pressure changes with height.
University Corporation for Atmospheric Research
Ucar: Air Pressure
Where air molecules are packed closely, air pressure is high. Where air molecules spread out, air pressure is low.
University Corporation for Atmospheric Research
Ucar: How Weather Affects Air Quality
How is air pollution affected by weather? Some types of pollution are worse in the summer heat, while others are worse in cold winter weather.
American Geosciences Institute
American Geosciences Institute: Weather in High and Low Pressure Areas
Find out why weather in high pressure areas is fair, and weather in low pressure areas is cloudy and stormy.
American Geosciences Institute
American Geosciences Institute: What Is Atmospheric Pressure?
See how atmospheric pressure affects air masses, which in turn affects the weather on Earth.
USA Today
Usa Today: Understanding Air Density and Its Effects
In simple terms, density is the mass of anything - including air - divided by the volume it occupies. In the metric system, which scientists use, we usually measure density in terms of kilograms per cubic meter. The air's density depends...
University Corporation for Atmospheric Research
Ucar: Change in the Atmosphere With Altitude
How does the atmosphere change as you go up high in the sky?
University Corporation for Atmospheric Research
Ucar: Wind
Wind is air moving from a place that has higher pressure to one that has lower pressure. Sometimes wind is just a light breeze and other times it is strong enough to blow the roofs off buildings.
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