An exploration of crystals that covers what they are, where they are found, how they grow, their uses, and more. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.
An illustrated introduction to geology that explains the forces responsible for creating rocks and minerals; the life cycles of igneous, sedimentary, and metamorphic rocks; plate tectonics; the theory of continental drift; and how fossils are created and studied. Includes step-by-step instructions for twenty related activities.
Describes the properties and uses of several different kinds of rock, including heavy rocks, rough and smooth rocks, precious stones, and sand and glass.