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.

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...

In this environmental science fair project, students will build models of fields prepared by plow-based and no-till methods, and see which ones are best at retaining soil moisture and preventing surface runoff.

The USGS gives an overview of the amount of water on Earth and where it is located. It gives a few interesting facts about the Earth's supply of water. Click Home to access the site in Spanish.

This unit contains a series of lessons that allow students to explore the effect of sunlight on Earth's natural surfaces of sand, soil, rock, and water. In addition, students explore how the color and material of a surface affects how...

The USGS reviews the differences between lakes and reservoirs. They discuss the history of freshwater and salt water lakes. Click Home to access the site in Spanish.

Build your own bathtub or pool toy from simple craft materials in this fun activity. You will build a rubber-band-powered boat that can zip across the surface of the water after you wind up the rubber band.

Students build a model to learn about the cycle of erosion and deposition by water and wind which deposits layer upon layer of rock, soil, and organic material to the surface.

From ABC News in Science, Irene Klotz's article examines a network of canyons and riverbeds on Mars's surface which, according to scientists, may have been home to certain "microbial life."

Capillary is described and explained. It is related to surface tension. Examples in botany and human physiology are given.