In each of these galleries, view hundreds of photographs of mineral and gem varieties. Complete information is given for each. This NASA supported site is aimed at k-12 to explore topics such as currently erupting volcanos, images and information, and how to become a volcanologist. Health American Cancer Society Cancer information Web of Addictions Facts about alcohol and other drug additions. Physics Interactive Tour of the Atom Explore the inner workings of the atom through the Particle Adventure.
Diagrams explain quarks, leptons, fermions, bosons, baryons, and more.
Physics A searchable or browsable database. Includes virtual-reality modeling to demonstrate concepts such as projectile motion. A comprehensive site for civil war information including photographs by Matthew Brady, time lines, images, letters and accounts, histories, and military information. In addition to information on the presidents from The New Book of Knowledge, Academic American Encyclopedia, and Encyclopedia Americana, take a quiz, listen to speeches, or work with virtual flash cards. For the presidents there is a color image, one fun fact, and links to inaugural addresses and biographical highlights.