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

An introduction, aimed at upper elementary- and middle-school learners, to acid rain. [Click back to home to access the site in Spanish.]

What is a sinkhole? Where are they found? What causes them? This text based article will provide the answer to these questions, and more!

A quick summary of the water cycle that includes a diagram of the cycle, with links to in-depth explanations of each component of the cycle. Click "water-cycle home" to access water-cycle resources in a variety of languages.

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...

This project shows you how to build a simple model system to simulate underground water flow. Underground water flow is important for understanding replenishment of underground aquifers, migration of underground contaminant plumes, and...

The career of hydrologist could become more and more important as the use of water increases. Find out about the education needed to become a hydrologist and read the Science Buddies profile about the many areas hydrologists use their...

Wastewater treatment plants are essential for providing us with clean water. The job of the liquid waste treatment system operator is to keep these plants operating. Find out about the education requirements for this job as well as the...

PBS and the Online NewsHour have created this multimedia website about water recycling. You can see how this process is different than other waste water treatments by reading interviews, watching a slideshow or investigating a map of...

The Center for Science in the Public Interest offers a discussion of contaminants that can be found in tap water and chemicals added to water in the public water systems. The topics discussed are arsenic, parasites, lead, turbidity, and...

Watch out. It's Eddy Vortex, Superhero. He swirls, he tumbles, he churns up air and water. OK, maybe eddies and vortices aren't exactly superheroes, but they are powerful regions of air and water flow that you have to watch out for in...

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]

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.

Harmful algal blooms occur when algae, which form the base of the ocean food web, grow in massive numbers and produce toxic or harmful effects on people, fish, shellfish, marine mammals, and birds. In this project you will learn how to...

The poet Carl Sandburg wrote, "The fog comes on little cat feet". In this weather science fair project, you'll discover why this beautiful, quiet creeper appears on some days, and not on others. If you are fascinated by fog and weather...

Find out whether reclaimed water is really safe by following the guidelines of the Science Buddies project.

This US Geological Survey site briefly discusses the basics of why pesticides are increasingly found in our ground water. Click Home to access the site in Spanish.

Learners investigate images of Hurricane Katrina as it moved through the Gulf of Mexico in August 2005. The resource has students examine images, infrared radiation, water vapor, and visible radiation to plot and measure the path of...

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 site from the U.S. Geological Survey provides great definitions of seven measurements that can be taken on water. Includes pH, dissolved oxygen, and turbidity. Click Home to access the site in Spanish.

It's hard to believe that the same water that you use every day to quench your thirst, cook with, bathe in, swim in, and wash your clothes and dishes, is capable of another trick-it can make electricity. Electricity can be generated...

Here is a cool project about making fresh water from salt water using solar power, also known as water desalination. The apparatus is made from readily available materials, and the power source is free. As an inventive thinker, you will...

In this activity, you will investigate some of the processes that make water move in and out of the atmosphere by making a miniature water cycle model inside a plastic bag.

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.