Other
Reverse Osmosis and Osmotic Pressure What They Are
This site gives a good explanation of osmosis and reverse osmosis. Also includes a scientific diagram of the process.
CK-12 Foundation
Ck 12: Chemistry: Agriculture
[Free Registration/Login may be required to access all resource tools.] Describes the role of chemistry in agriculture, in both beneficial and harmful ways.
Thinkport Education
Thinkport: Water, Water, Everywhere: Make a Prototype and Test Your Design
Students create a water purification system, and test it out to see how well it works to purify a water sample.
Math Science Nucleus
Math/science Nucleus: Nu, You, and Water Animation
This animation discusses water and its properties in a storybook format. An emphasis is placed on filtration and purification of water.
Other
Fundamentals of Reverse Osmosis
This site provides a basic definition of reverse osmosis, with a bit of a slant on why water pretreatment is important.
US Environmental Protection Agency
Epa: Water Treatment Process
In this illustratd diagram of the water treatment process, click on each step to learn more information.
![Iowa Public Television: Water Mini Web Quest [Pdf] Unknown Type](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Iowa Public Television: Water Mini Web Quest [Pdf] Unknown Type")
PBS
Iowa Public Television: Water Mini Web Quest [Pdf]
Browse the Explore More: Water Quality website to answer these questions about how water is used, who uses it and how these uses impact the quality of water. Find ways to make a difference in water quality through the choices you make.