Rain, rain, go away ... at least if your pH is below six! The sixth installment in a series of seven videos teaching about pollution and our atmosphere shows learners the facts about acid rain. Embedded pauses allow you to stop and check...

The rules related to solubility of salts are explained in a video that shows the solubility table that summarizes them and concludes with why this information is important to know. 

It is safe to say that everything is best in moderation—including preservatives in food. Microbes and oxidation are the main reasons foods become spoiled. Thanks to preservatives, our foods end up having a longer shelf life. But what...

See how students use classroom tools to measure estuarine water quality. Students sample estuary water for nitrogen using the Colorimeter. [3:03]

Learn how farm runoff impacts water quality and human health. Tour the water treatment plant in Des Moines, Iowa, and learn how the water is filtered, in this video excerpted from the independent film 'Big River: A King Corn Companion.'...

This video segment adapted from 'Earthkeeping: Toxic Racism' looks at how pollution from an industrial hog farm impacts people who live near the farm. Learn about waste lagoons and other environmental hazards from animal feeding...