What does it mean to have hard or soft water? Learners discover the chemistry behind water hardness in the fifth video of a seven-part series describing our water resources. Using simple animations and balanced chemical equations, young...

How do we stop acid rain from forming or repair the damages it causes? The seventh and final video in the series presents learners with common methods of reducing the harmful effects of acid rain. Topics such as the scrubbers used...

This rock is on a roll! Introduce young geologists and environmentalists to the many uses of limestone using the fifth installment in a series of seven. Illustrate the components and properties of cement, mortar, and concrete,...

Aren't all rocks the same? High school earth scientists can say "definitely not!" after viewing the second in a series of seven videos. Beginning with an easy analysis and comparison of sandstone and granite, class members follow the...