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.
Annenberg Foundation
Annenberg Learner: Weather: The Water Cycle
An article about the water cycle and the role that water plays in cloud formation.
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.
NOAA
Noaa: National Weather Service: Simplified Hydrologic Cycle
The National Weather Service offers information on the processes that make up the water (hydrologic) cycle, including evaporation and transpiration, precipitation, run-off, infiltration, and percolation. Has a good illustration and...
Science Struck
Science Struck: Water Cycle: An Easy Explanation for Kids
Provides a simple explanation of the water cycle by describing four main stages - evaporation, condensation, precipitation, and collection. Includes three project ideas and some interesting facts.
Other
Niwa: Common Hydrological Terms
A glossary of terms that describe the processes that occur in hydrology. Glossary explains evaporation, precipitation, soil moisture, groundwater, and stream flow.
US Geological Survey
Usgs: How Much Water Is There on (And In) the Earth?
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.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Water: A Never Ending Story
Students carry out a number of activities that demonstrate the concepts of evaporation, condensation, precipitation, and soil moisture and runoff. Then students construct a terrarium as a way to observe the water cycle. Immediately...
Other
Pennsylvania Department of Environmental Protection: Just for Kids: Watershed
What is a watershed? Learn the answer to this question and find out about the Susquehanna River watershed on this site.