Aimed at students aged 11 to 16 years, this science dictionary features 4500 entry words in colour with clear definitions; 300 illustrations; detailed treatment of selected subjects; dozens of informative panels on key terms; and biographies of famous scientists. It covers a wide variety of fields, including chemistry, biology, meteorology, ecology, physics, geology, astronomy and zoology. Definitions are written in a clear, straightforward style and extensive cross-referencing encourages readers to develop their vocabularies.