Superb reference book with downloadable pictures and links to over 1000 websites for homework help. Covers physics, chemistry, biology, IT, Earth sciences and astronomy. Fabulously illustrated with photographs, cut-away illustrations and step-by-step diagrams. With a glossary of 1,500 scientific terms, key dates, biographies of scientists and inventors, 140 experiments to do at home and test-yourself quizzes. “a 400-page encyclopedia with more than 1,000 websites - that\'s some added value” Times Educational Supplement