Webmolecules is a must-see for science whizzes and anyone else who wants to see some cool virtual reality applications. Project Ideas - A major source of Science Fair ideas, projects, and links. It is divided by areas of interest. Mendocino County Science Fair is the Mendocino County Science Fair site. It has all the dates and requirements for entering.
Glacier contains just about everything about Antarctica known today.
The Lighthouse has weather forecasts for the whole nation. The University of California Museum of Paleontology provides a good, no-nonsense web site for students of geology and evolution. Home Page of Volcano World is a wealth of information about volcanoes. Interactive Maps is all about weather. Its maps are updated every six hours.