An encyclopedia of science and technology, covering such areas as the Earth, the ocean, plants and animals, medicine, agriculture, manufacturing, and transportation.

Science reference set introducing important science information and concepts, covering topics from Anatomy to Zoology. Features include science activities and experiments, "How-to-use" and "Did You Know" sections in each volume, guide words, pronunciation guides, cross references, resource list, and cumulative index.

A twenty-five-volume, alphabetically-arranged science encyclopedia.

A comprehensive guide to science and technology, arranged by such topics as matter, weather, and living things.

Over 1500 illustrations, projects, experiments and activities, clear scientific explanations in simple language.

Questions and answers provide information on a variety of topics.