Earth Science







How is Air Quality Measured

Air quality is measured by the Air Quality Index, which falls under the jurisdiction of the Environmental Protection Agency (EPA). The EPA, on a daily basis, releases the air quality index (AQI) for that particular day. If air quality is…
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How Ground Fog Forms

Anyone who drives a car or other vehicle at night or during the early morning has experienced the phenomenon of what is called “ground fog” – especially during cooler nights in the fall. Ground fog hugs the ground and does…
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Rain Gauges

Did you ever wanted to know how much rain just fell in your own backyard?  How about keeping track on a month’s worth of rain amounts by recording them every day?  Rain gauges are great for anyone who’s a weather…
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Tornadoes

Tornado season in the United States varies. Tornadoes can happen at any time of year, even for places that typically experience snowy winters. Generally, the southern United States encounter severe weather events earlier than the northern states. That begins around…
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