There are many places that you can get more information on the hydrosphere. Some of them concentrate more on the large bodies of water like the ocean and seas and some focus on watersheds and ground water.
Resources on the web
The Ocean:
Ocean Planet developed by the Smithsonian is a traveling exhibit about the ocean. On their web page you can take a virtual trip through this exhibit about the oceans. http://seawifs.gsfc.nasa.gov/ocean_planet.html.
Woods Hole Oceanographic Institution is a research institution affiliated with MIT dedicated to understanding the oceans. The WHOI in Motion web page, http://www.whoi.edu/WHOI/VideoGallery/ trys to bring oceanography closer to the students and the public through animations and video of nature and research in the oceans. Woods Hole Oceanographic Institution also is also committed to educating others about the ocean. Educational resources at http://www.whoi.edu/k-12/k12-resources.html. Woods Hole's main web page is http://www.whoi.edu.
The New England Aquarium's focus is on raising people's awareness of the environment through exhibits, education programs, public forums, and outreach programs. Their web site can take you on virtual tour of their exhibits, tell you about their conservation efforts, and research initiatives. There are also educational resources for teachers and access to information for student reports. http://www.neaq.org.
Monterey Bay Aquarium: Through the E-quarium you can visit the various exhibits at the Monterey Bay Aquarium, learn about ocean conservation, or go to the Learning Center where there is information and activities for students and teachers. http://www.mbayaq.org
Watersheds and Groundwater:
The United States Geological Survey (USGS), Water Resources in the United States: This site has resources for you to identify your watershed and determine how healthy it is. You can also get information about ground water, water quality, and about research efforts by the USGS. http://water.usgs.gov/
The Environmental Protection Agency (EPA): This site has resources to help you learn about your watershed and water quality. You can also see how the EPA carries out its mission to protect public health and the environment. http://www.epa.gov
Books:
Descriptive Physical Oceanography, 5th Edition by George L Pickard and William J Emery, Pergamon Press, Oxford, 320pp. 1990.
Physical Geography: Science and Systems of the Human Environment by Alan Strahler and Arthur Strahler, John Wiley & Sons, Inc. New York, 640pp, 1997.
Contemporary Climatology by Ann Henderson-Sellers and Peter J. Robinson, Longman Scientific & Technical and John Wiley & Sons, New York, 439pp, 1986.