Full of easy-to-do experiments and descriptive illustrations, each book in the series focuses on a certain aspect of science. From magnetism and electricity to chemical reactions, the inventive experiments help transform complicated theories and concepts into easily understood ideas. Supports the national science education standards Unifying Concepts and Processes: Systems, Order, and Organization, Unifying Concepts and Processes: Evidence, Models, and Explanation, Unifying Concepts and Processes: Constancy, Change, and Measurement, Unifying Concepts and Processes: Form and Function, Science as Inquiry, and Physical Science as outlined by the National Academics of Science and endorsed by the National Science Teachers Association. How do shadows form and why do they change shape? Why can we see very little in the dark? Filled with fun experiments, this fact-filled guide uncovers the answers to questions like these and much more.