A collection of about 600 science facts forms the foundation on which this book is built. These facts are based on several questions collected that were asked by several hundred children in the upper elementary grades, over a period of a year and a half.. The book includes all the scientific facts that students need to know about gravitation, molecular attraction, conservation of energy, heat, light, sound, magnetism, electricity, mingling of molecules, chemical change and energy, and solution and chemical action. The facts included are designed to be fascinating in all areas of science.