The U.S. Geological Survey (USGS) and the Food and Agriculture Organization of the United Nations (FAO) have teamed up to create a water-cycle diagram for schools. Use the interactive version and download printable files of the diagram.

An in-depth explanation of the Earth's water cycle, including a hyperlinked diagram that provides direct access to information about each phase in the cycle.

A great slideshow that compares an effective water cycle with an ineffective one. Content can be read in five different languages.

This page discusses the presence of arsenic (chemical symbol As) in ground water in the United States. Also provides many links to other sites about arsenic (especially in drinking water.)

NASA is interested in clouds because they are an integral part of the water cycle, and because they are a controlling factor in the energy budget of the Earth. This chart provides a basic introduction to the identification of clouds. The...

The University of Siegen provides a lovely exothermic reaction shown by four large photos. Sodium peroxide and zinc powder with a touch of water.

This photo shows a number of giant water lilies that are part of a wider garden. The giant water lilies stretch out across the surface of the water, blocking much of the light that would normally pierce the water surface. For more...

What happens when you add water to sodium? This photo says it all. Sodium is an alkali metal, part of a group of extremely reactive metals. It doesn't take much for them to react and as this photo shows, a little water is more than enough.

This image helps highlight the problem of water pollution that can effect various rivers, lakes and other sources of water.

These models show the structures of some basic molecules such as water and carbon dioxide, then move on to show more complex molecular strautures.

[Free Registration/Login Required] Ready made worksheets for any earth science unit on water cycles, the layers of the earth, or volcanoes.

Learn about color change and pH as it relates to chemical changes.

Water rages down the rapids section of this long river. The white water flows at a high speed as it forces its way through the rocks.

This photo shows a dangerous looking alligator lurking just above the surface of the water. Learn more about alligators by checking out our range of fun alligator facts for kids.

A relaxed looking duck floats comfortably on the surface of the water.

A photo of an interesting looking fish as it swims through the water past rocks. Learn about fish by enjoying our range of fun fish facts for kids.

A close up photo of a scary looking great white shark as it swims through the blue water with some smaller fish close behind. Learn about different types of sharks by checking out our range of interesting shark facts for kids.

A spectacular looking jellyfish swims through the water in an aquarium. Learn about jellyfish by enjoying our range of fun jellyfish facts for kids.

Four large white swans walk over the muddy ground on their way to the nearby waters edge. There is a boat on the left hand side of the photo. Learn about a wide range of birds while checking out our fun bird facts for kids.

This photo shows a completed chromatography chemistry experiment. The colors have clearly separated from each other along the piece of paper. The original black ink was separated using an ethanol and water mixture solvent.

A computer generated image showing a 3D model of hydrogen bonds in water.

This unbelievable photo was taken from above Cyclone Catarina as it raged over the water and land below. A clear spiral can be seen with the eye of the storm also easily visible.

An incredible scene from the 2004 tsunami in Thailand has been captured in this memorable photo. As a huge wall of water bursts through the trees people begin to scatter in every direction, previously unaware of the danger that was so...

A beautiful day at a beach is highlighted by the suns rays which pierce the clouds and gently illuminate the water as the small waves gently ripple on the shore.