Showing 1-9 of 9 assets

Molecule Profile:  H<sub>2</sub>O - Water

Date : 01/11/2011

Clip Length : 00:04:46

This NBC Learn video "profiles" the H2O molecule -- its structure, polarity, cohesive and adhesive properties, and water's properties as a "universal" solvent.

Molecule Profile: H2O - Water
The Water Cycle

Date : 01/01/2009

Clip Length : 1

Illustration, with arrows and text, showing how and in what form water circulates on, above, and below the surface of the Earth. Source: USGS, US Dept. of the Interior (2010)

The Water Cycle
Fairy Picture of Water - H<sub>2</sub>O

Date : 01/01/1887

Clip Length : 1

Victorian-era drawing of three fairies holding hands, to depict the number and arrangements of atoms in the H2O molecule; illustration published in children's science book, "Real Fairy Folks: Explorations in the World of Atoms," by Lucy Rider Meyer (1887). From the collections of the Chemical Heritage Foundation.

Fairy Picture of Water - H2O
First-Ever Image of a Molecule (Million Times Smaller Than Grain of Sand)

Date : 08/31/2009

Clip Length : 00:00:33

In the summer of 2009, researchers at IBM release the first-ever image of a single molecule--a million times smaller than a grain of sand.

First-Ever Image of a Molecule (Million Times Smaller Than Grain of Sand)
Americans Getting Too Much Fluoride, in Drinking Water, Toothpaste

Date : 01/07/2011

Clip Length : 00:02:09

Dr. Nancy Snyderman reports on new federal recommendations to lower levels of fluoride in the nation's drinking water. Too much fluoride, from several sources, is linked to tooth discoloration and streaking in 41 percent of American teens.

Americans Getting Too Much Fluoride, in Drinking Water, Toothpaste
After 30 Years, Fight on Fluoride in Water Goes on in Brainerd, MN

Date : 09/25/1984

Clip Length : 00:04:29

This 1984 Today show story recounts Brainerd, Minnesota's 30-year battle against state-mandated fluoridation of the municipal water supply. Opponents claim the added fluoride is a by-product of the aluminum industry, and is linked to cancer.

After 30 Years, Fight on Fluoride in Water Goes on in Brainerd, MN
U.S. Water Withdrawals Per Day By End Use, 1940-2000

Date : 03/24/2004

Clip Length : 1

Table shows water withdrawals in the U.S. per day, in 5-year increments from 1940 to 2000 and in billions of gallons, by end use, from irrigation to steam electric utilities. Source: USBDBD (March 12, 2004)

U.S. Water Withdrawals Per Day By End Use, 1940-2000
Concentration of Dissolved-Solids in Aquifers, Streams of the Southwest

Date : 01/01/2003

Clip Length : 1

Map of Southwest U.S. showing median daily concentrations (in milligrams per liter) of dissolved-solids in basin-fed aquifers and in streams. Source: USGS (2003)

Concentration of Dissolved-Solids in Aquifers, Streams of the Southwest
Word Roots: Bios

Date : 08/04/2008

Clip Length : 00:01:15

10 words, from "biography" to "antibiotic" -- derived from the Greek root "bios," meaning "life" -- are shown in this NBC animation.

Word Roots: Bios

Showing 1-9 of 9 assets

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