The Physical World: An Introduction to Physical Science for Christian Schools was written for you, the curious student. We have filled this textbook with answers to puzzling questions about why things happen and how things work. But this text should do more than simply answer your questions. It is intended to stimulate new questions that will cause you to expand your knowledge. You will be introduced to realms that you have never before explored. This book will take you "inside" an atom; let you "see" what happens in solids, liquids, and gases; help you to discover the forces that make things move or keep things from moving; and show you forms of matter and energy that scientists are just beginning to understand. - Introduction