Quick Revision NotesClass 9 Mathematics Ch 1: Number Systems Ch 2: Polynomials Ch 3: Coordinate Geometry Ch 4: Linear Equations in Two Variables Ch 5: Introduction to Euclid’s Geometry Ch 6: Lines and Angles Ch 7: Triangles Ch 8: Quadrilaterals Ch 9: Circles Ch 10: Heron’s Formula Ch 11: Surface Areas and Volumes Ch 12: Statistics Science Ch 1: Matter in Our Surroundings Ch 2: Is Matter Around Us Pure Ch 3: Atoms & Molecules Ch 4: Structure of the Atom Ch 5: The Fundamental Unit of Life Ch 6: Tissues Ch 7: Motion Ch 8: Force and Laws of Motion Ch 9: Gravitation Ch 10: Work and Energy Ch 11: Sound Ch 12: Improvement in Food Resources Contemporary India-I Ch 1: India – Size and Location Ch 2: Physical Features of India Ch 3: Drainage Ch 4: Climate Ch 5: Natural Vegetation and Wildlife Ch 6: Population Economics Ch 1: The Story of Village Palampur Ch 2: People as Resource Ch 3: Poverty as a Challenge Ch 4: Food Security in India India and theContemporary World-I Ch 1: The French Revolution Ch 2: Socialism in Europe and the Russian Revolution Ch 3: Nazism and the Rise of Hitler Ch 4: Forest Society and Colonialism Ch 5: Pastoralists in the Modern World Democratic Politics-I Ch 1: What is Democracy? Why is Democracy? Ch 2: Constitutional Design Ch 3: Electoral Politics Ch 4: Working of Institutions Ch 5: Democratic Rights