The contents of this book SCIENCE for NTSE, Olympiads and Competitive Examinations have been developed in accordance with the needs of the students. It follows simple learning approach and offers conceptual clarity and complete syllabi coverage in each chapter for the benefit of students. The book conforms to the latest pattern of question-setting of NTSE. The book is made up of 31 chapters divided into three parts: Part A (Physics) consists of 11 chapters Part B (Chemistry) consists of 8 chapters Part C (Biology) consists of 12 chapters Each chapter consists of Brief Theory, Key Concepts, followed by Solved Examples, Multiple Choice Questions (MCQs) and Answer Key and Hints & Solutions. The solutions to the MCQs are given at the end of each chapter. Previous Years' Questions, where available, have been given at the end of each chapter for clear understanding of the kinds of questions set. Hints and Explanations of many questions offer a window to students to know how the correct answers have been arrived at. The book is also recommended for Olympiads and other competitive examinations. Contents: Publisher’s Note Perface NTSE : An Introduction How to Prepare for NTSE Part I : Physics 1. Motion 2. Force 3. Work, Energy and Power 4. Gravitation 5. Heat 6. Wave, Motion and Sound 7. Light 8. Electricity 9. Heating and Magnetic Effects of Current 10. Sources of Energy 11. Exploring Universe Part II : Chemistry 1. Matter in Our Surroundings 2. Acids, Bases and Salts 3. Atoms and Molecules 4. Classification of Elements 5. Chemical Bonding and Molecular Structure 6. Chemical Reactions and Equations 7. Carbon and its Compounds 8. Metals and Non-metals Part III : Biology 1. Human Health and Diseases 2. The Living World 3. Our Environment 4. Natural Resources 5. Nutrition 6. Life Processes 7. Control and Co-ordination 8. Reproduction 9. Cell and Tissues 10. Food Resources 11. Air and Water Pollution 12. Genetics and Evolution