The American Heritage(R) Student Science Dictionary covers a wide variety of fields, including chemistry, physics, biology, geology, meteorology, astronomy, ecology, and zoology. Its definitions are written in a clear and straightforward style that even beginning students can follow. An extensive cross-reference program encourages readers to build a more complex vocabulary. The dictionary includes - more than 4,500 entry words with clear, easy-to-understand definitions - more than 425 full-color photographs and drawings - 175 Feature Notes on important scientific concepts, the major discoveries of many scientists, and the usage and history of scientific terminology - detailed graphic treatment of selected subjects, such as the structure of atoms, photosynthesis, plate tectonics, and the life of stars - handy tables and charts, including the periodic table of the elements, a chart of geologic time, and a timeline of advances in computing. The American Heritage(R) Student Science Dictionary is the ideal resource for homework assignments, school projects, or just browsing. This book is the key to unlocking the language of science and the natural world for students and their families.