From the depths of the Earth to the heights of the atmosphere and beyond, chemicals are everywhere. This book emphasizes the chemical reactivity taking place all around us, all the time, in many ways. Beginning with the differences between physical and chemical changes, it briefly presents the structure of atoms, chemical bonds and their involvement in reactions, and the need for energy to power these reactions. Formulas and equations are described, and the conservation of mass and energy in chemical reactions is emphasized. There are descriptions of various types of reactions such as synthesis and decomposition, replacement, combustion, oxidation-reduction, and acid-base. The importance of energy in exothermic and endothermic reactions is discussed in the context of bioluminescence and fuel use. The issue of global warming associated with use of fuel is presented along with suggestions of what students can do to help alleviate the problem. Ways of controlling reactions, particularly those that are a nuisance or harmful, are also discussed.A section on "a world of reactions" discusses photosynthesis and respiration as central reactions of living organisms. Also included in this section are descriptions of reactions in the air, underground, and in the sea; and there are examples of reactions that make consumer products such as fertilizers, batteries, and plastics. The final section invites students to try several hands-on activities that include secret writing and raisin races and offers a recipe for chemically preserving newspaper clippings. A lot of fundamental information can be found in the eight books in the Sci-Hi series. Each would be very useful as a springboard for further research on numerous topics.The series is targeted to students in grades 6-9. Each colorful, 48-page book is enlightening, visually attractive, and easy to read. The authors approach each subject by putting core information into a magazine format with large titles, a variety of fonts, clear introductions, catchy graphics, informative sidebars, and specific examples of the content being discussed. Despite their length, there is much packed into these high-interest volumes. At the end of each volume is a glossary, lists of books and websites for further information, and a comprehensive index. Other features in the various books are timelines, content reviews, and quizzes. Having this series of books available can provide a good foundation and support the learning of key concepts of the National Science Education Standards for physical science. The books would be an engaging and useful resource for a middle school science classroom or school library. Recommended-Richard Lord, High School Biology TeacherNSTA 3/11/2009