By the USGS, topics include: basics, water use, FAQ, special topics, glossary, activity center, and picture gallery.

A new photo each day with a brief background.

Offers satellite images, make a map, minerals and metals, ask the experts and information on the polar continental shelf.

Where on earth can you find the highest mountain, the greatest river, the thickest ice? Get the answers from Extreme Science.

Experts at the University of Hawaii answer questions related to earth science.

Provides in-depth information about storms, atmosphere, fisheries, the Great Lakes, oceans, and El Nino. Material written especially for middle school students.

Learn about NASA earth science projects related to air, thunderstorms, the earth's crust, tropical rainfall, and water. Sponsored by NASA's Earth Science Enterprise.