Contamination in drinking water sources or watersheds can negatively affect the organisms that come in contact with it. The affects can be severe - causing illness or, in some cases, even death. It is important for people to understand...

Get an overview of how water is treated in order to be safe to use and drink.

Discusses many options of water treatment, the contaminants that the treatments are focused on, how the treatment works, and common treatment systems.

Learners learn about water quality testing and basic water treatment processes and technology options. Biological, physical and chemical treatment processes are addressed, as well as physical and biological water quality testing,...

Students learn about the human water cycle, or how humans impact the water cycle by settling down in civilizations. Specifically, they learn how people obtain, use and dispose of water. Students also learn about shortages of treated,...

KidsHealth: Dehydration and Treating Dehydration

In addition to providing a good definition of "Dehydration," this website explains how dehydration affects the body, how people get dehydrated, and how you can treat and prevent dehydration.

In this activity, students will use a tutorial on the U.S. Environmental Protection Agency's website to learn about how surface water is treated to make it safe to drink.

Learn what can cause dehydration, and recognize the signs and symptoms of dehydration. This website also has a section on how dehydration affects children.

This encyclopedia article on dehydration is organized into several sections, including: "Definition," "Causes, incidence, and risk factors," "Symptoms," and "Treatment."