The book 'National Science Olympiad' has been divided into five sections namely Science, Logical Reasoning, Achievers section, Subjective section, Model Papers. In every chapter, the theory has been explained through solved examples, illustrations and diagrams wherever required. Multiple Choice Questions (MCQs) with detailed solutions are provided in the end of each chapter to enhance the problem solving skills of candidates. The questions in the Achievers section are set to evaluate scientific skills of brilliant students whereas the Subjective section includes questions of descriptive nature. Two Model Papers have been included to do practice on the expected questions. A CD containing Study Chart for systematic preparation, Tips & Tricks to crack Science Olympiad, Pattern of exam, and links of Previous Years Papers is accompanied with this book. The book is also useful for various competitive exams such as NTSE, NSTSE, and SLSTSE as well. #v&spublishers CONTENTS: 1. SCIENCE a) Light b) Human Eye and Colourful World c) Electricity d) Magnetic Effects of Electric Current e) Sources of Energy f) Chemical Reactions and Equations g) Acids, Bases and Salts h) Metals and Non-Metals i) Carbon and Its Compounds j) Periodic Classification of Elements k) Life Processes l) Reproduction in Organism m) Heredity and Evolution n) Our Environment 2. LOGICAL REASONING a) Analogy b) Classification c) Coding and Decoding d) Number, Ranking, and Time Sequence Test e) Direction Sense Test f) Alphabet Test g) Blood Relation Tes h) Mathematical Operations i) Series j) Paper Folding k) Paper Cutting l) Mirror Images 3. ACHIEVERS’ SECTION a) Higher Order Thinking Skills (HOTS) b) SHORT ANSWER QUESTIONS c) MODEL TEST PAPER – 1 d) MODEL TEST PAPER – 2 e) HINT AND SOLUTIONS