Many different kinds of organisms live in water. Excess nutrients can cause over-abundant growth of some organisms living in water and non-point source pollution is a major threat to water supplies in the United States. In this lesson...

This video segment adapted from Last Oasis explores the use of new dams as a way to provide or store water. In the 1990s, the city of Denver was looking for a new source of water for its growing population, and its plan to build a new...

Looks at water pollution, its causes and impact, what individuals and governments can do to combat it, and the process of treating wastewater.

Learn about water as a precious resource in danger of being depleted. Understand the roles that overuse and agricultural use play in the sustainability efforts of this essential resource. Includes video. [28:25]

Article explains the water crisis currently affecting the citizens of Flint, Michigan. Includes video.

Why does ice float? In this article answer that question by learning about the topics of Specific heat capacity, evaporative cooling, and heat of vaporization of water.

A new sensor can detect poisons from harmful algae within minutes so that drinking-water plants can start timely treatments.

Soil and water conservation are important in the protection of the earth's natural resources. Read about the careers that study and encourage conservation. Find out about the educational requirements necessary to become a soil or water...

Understand what watersheds are and the purpose of drainage basins. This is a resource designed to enrich classroom learning about the science of water.

This guide engages children in the process of scientific inquiry using the context of a favorite early childhood pastime-water play.

This site, from an archived Smithsonian exhibit, describes and illustrates the effects of toxic materials on wildlife in bodies of water.

The Ozone and Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change.

Investigate why water properties make it unique and good at supporting life in this article. Learn about the life-sustaining properties of water that are caused by the hydrogen bonds that it forms.

In this lesson plan, students use National Geographic FieldScope to investigate patterns of water availability and precipitation in the United States.

Read about the fascinating discovery of liquid water on Mars. Includes video.

Learn about the potential effects of a water shortage on the state of California.

This simulation from the National Center for Atmospheric Research portrays annual patterns in water vapor and precipitation across the globe, illustrating general circulation patterns as well as seasonal and regional variation. [4:52]

Investigate water in a warmer world. This teaching box is filled with explorations and readings that help secondary learners learn how climate change is affecting the water cycle.

In this lesson, students will explore how water is continually cycled among land, the oceans, and the atmosphere.

Discusses the many occupations within the field of water transportation. Included in information is what they do, work environment, how to become one, salary, job outlook, etc.

This resource explains what pH is and how it relates to water. The resource includes a colored graphic of the pH levels and a map of pH levels around the USA.

This resource provides occupational information about water transportation careers.

A Portland, Oregon-based startup that launched in 2007, is starting to capture the energy of water pipes, beginning with a pilot project in Riverside, California and now with a full-scale project in Portland.

Provides a brief overview of the Clean Water Act. Includes links to its history and to information about compliance and enforcement.