Science

Class 9 Science Chapter 12: Sound, designed for effective revision and exam preparation. Class 9 Science – Chapter 12: Sound – Revision Notes Chapter at a Glance This chapter deals with the production, propagation, and reflection of sound. It explains the nature of sound waves, their characteristics, and how the…

Class 9 Science Chapter 11: Work and Energy, designed for effective revision and exam preparation. Class 9 Science – Chapter 11: Work and Energy – Revision Notes Chapter at a Glance This chapter introduces the fundamental concepts of Work, Energy, and Power. It establishes a relationship between them and explains…

Class 9 Science Chapter 10: Gravitation, designed for effective revision and exam preparation. Class 9 Science – Chapter 10: Gravitation – Revision Notes Chapter at a Glance This chapter explains the force that governs the motion of celestial bodies and objects on Earth—Gravity. It covers Universal Law of Gravitation, free…

Class 9 Science Chapter 9: Force and Laws of Motion Class 9 Science – Chapter 9: Force and Laws of Motion – Revision Notes Chapter at a Glance This chapter introduces the fundamental concepts of force and motion, primarily through Newton’s Three Laws of Motion. It explains how forces cause…

Class 9 Science Chapter 8: Motion. Chapter 8: Motion – Short Notes 1. Introduction 2. Scalar and Vector Quantities 3. Distance and Displacement 4. Uniform and Non-Uniform Motion 5. Speed 6. Velocity 7. Acceleration 8. Graphical Representation of Motion A. Distance-Time Graph B. Velocity-Time Graph 9. Equations of Motion by…

Class 9 Science Chapter 3: Atoms and Molecules based on the NCERT syllabus. Chapter 3: Atoms and Molecules – Short Notes 1. Laws of Chemical Combination 2. Dalton’s Atomic Theory Postulates: (Note: Modern research shows atoms are divisible into sub-atomic particles like electrons, protons, and neutrons, and atoms of the…

Chapter 2: Is Matter Around Us Pure? – Short Notes 1. Introduction 2. What is a Mixture? 3. Types of Pure Substances Property Mixture Compound Composition Variable Fixed Properties Properties of components are retained New properties different from components Separation Components can be separated by physical methods Components can be…

Class 9 Science Chapter 4: Structure of the Atom. Chapter 4: Structure of the Atom – Short Notes 1. Charged Particles in Matter 2. The Structure of an Atom 3. Distribution of Electrons in Different Orbits (Shells) 4. Valency 5. Atomic Number and Mass Number 6. Isotopes 7. Isobars Important…