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Underground Aquifer Water: Precision Farming (2008)

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Despite its wonders, Earth's water cycle does not spread water evenly around the planet. The Ogallala AquiferÂ’s huge underground reservoir of water gives the relatively dry Central Plains states such as Nebraska a large but limited irrigation source. But the aquifer's water is being used up faster than it is beng replenished.

Grade Level: 
Elementary
Middle
High
Length: 
00:09
Underground Aquifer Water: Precision Farming

Nanotechnology. An Introduction (2007)

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This program begins with an explanation of nanotechnology, and then demonstrates micrometers and nanometers. Viewers will also examine the special properties of nanoparticles, the gecko effect, carbon nanotubes, surface energy; hydrophilic and hydrophobic surfaces as well as the lotus effect.

Grade Level: 
Middle
High
Length: 
00:26
Nanotechnology. An Introduction