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.
PBS
Pbs Learning Media: Earth's Water Movements
The paths that water can take through Earth's systems are many and complex. Examine the following diagram from NASA depicting the water cycle. Studying the water cycle is important because changes in the water cycle affect all parts of...
Other
Interactions Between the Atmosphere & Hydrosphere [Pdf]
A discussion of the interactions between the four spheres of Earth and how they affect weather and climate. The slideshow is divided into two parts. The first deals with interactions between the atmosphere and the hydrosphere and the...