Arihant’s All in One has been a favourite and first choice of teachers as well as students since its first edition. All in One Science has been designed for the students of Class IX. The fully revised 2018 edition has been penned down by an experienced examiner providing all explanations and guidance needed for effective study and achieving success in the upcoming CBSE Class IX Science Examination 2018. The whole syllabus for Class IX Science Examination 2018 has been divided into 15 chapters namely Matter in Our Surrounding, Is Matter Around Us Pure, Atoms & Molecules, Structure of the Atom, The Fundamental Unit of Life, Tissues, Diversity in Living Organisms, Motion, Force & Laws of Motion, Gravitation, Work & Energy, Sound, Why Do We Fall Ill, Natural Resources and Improvement in Food Resources, each containing complete study of all the chapters covered in the NCERT Science Textbook along with complete explanation of all the questions given in the textbook. Solutions to all NCERT Textbook Exercise questions have been provided in this book. From the examination point of view separate sections for summative assessment and formative assessment have been given. For complete study and assessment, study in notes form with Summative and Formative Assessment has been provided. Questions given in each chapter have been grouped as Very Short Answer Type, Short Answer Type, Long Answer Type and HOTS. These Topicwise-Chapterwise questions cover NCERT Questions, Previous Years’ Examination Questions as well as other important questions from the examination point of view. Solutions and explanations to all the questions have been given to facilitate easy learning and understanding. Chapter Exercisecontaining ample number of unsolved questions has also been provided for assessing the level of preparation. Also five full length sample question papers strictly based on the whole syllabus and pattern of the examination have been provided at the end of the book to help aspirants get feel of the real examination.