US Geological Survey
U.s. Geological Survey: Water Cycle
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.
US Geological Survey
Usgs: The Water Cycle
Learn about the movement of water from Earth's surface to the atmosphere with this site. Site describes the water cycle in words and with a diagram. Also explored on the page is the distribution of Earth's global water supply.
US Geological Survey
U.s. Geological Survey: The Water Cycle: The Oceans
Through pictures, diagrams, and charts, learn how the ocean serves as a storehouse of water.
US Environmental Protection Agency
Epa: The Water Cycle [Pdf]
An illustrated diagram of the water cycle that students can use for study.
University of Illinois
University of Illinois Urbana Champaign: A Summary of the Hydrologic Cycle
Animation and text explain the water--or hydrologic--cycle, which is the process that water undergoes in nature.