US Geological Survey
Usgs: Water Properties and Measurements
Learn about the various attributes of water and how they affect life on Earth.
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.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Earth's Hydrologic Cycle
In this experiment, students create a model of the water cycle and learn about its crucial role in moving water around the Earth.