Fast reference is the key to this science dictionary, written and designed especially for junior and senior high school students. It presents 130 two-page spreads, each spread devoted to a scientific theme or general scientific topic. Themes are arranged alphabetically, starting with acids, bases, and alkalis, and ending with zany and curious science. Other themes cover a wide range of topics, including chemical equations, ecology, human reproduction, periodic table, and many more. Each theme contains approximately 15 scientific terms, clearly defined and, where helpful, supplemented with a diagram or illustration. For students looking directly for the meaning of a term rather than a general theme, the bookas Wordfinder section serves as an alphabetical index, listing every term and following it with the page number where it is explained. There are more than 2,500 words and definitions in total. Hereas a book that belongs in every secondary school library and science classroom. Avid science students will also want a copy for themselves to use as a supplement to their textbooks.