Science 3 Chemistry covers the National Curricula and complies with the number of instructional hours for this subject. The various illustrations, diagrams, photographs, maps, tables, and graphs, as well as the content in this book, support the student¿s understanding of the subject.The constructivist methodology of the books, is based on expected learning outcomes; the different activities, sections, and support links included in this text, maintain this competency-based approach.