Sophia Learning
Sophia: Water Resources in the World
Brief video lecture discusses the importance of water as a critical life resource. [2:53] Additional video explores the human side of the story with the resulting global implications. [2:44]
Other
University of Texas at Dallas: Why Is the Sea Salty?
A clear and concise explanation of why some of the earth's waters are salty and others are not.
PBS
Nh Pbs: Nature Works: Estuaries
Learn more about estuaries when you visit this informative site. This resource provides locations of and weblinks to estuaries in the United States.
Science4Fun
Science4 Fun: Lakes
What is a lake? Learn about some famous lakes in the world and how they are formed.
Bill Nye
Bill Nye: Eggs Speriment
Try this at-home science experiment to learn if salt affects the way things float.