Everything you ever wanted to know about black holes, reptiles, mirages, computers, tornadoes, human body, volcanoes, dinosaurs, and more! Features more than a hundred illustrations/diagrams/photos, lively definitions/charts/tables and general explanations and hands-on experiments, biographical profiles, and fun facts. Reference guide provides ifnormation on ten different areas of science including botany, zoology, ecology, astronomy, earth sciences and physics. Middle school level.

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