NCERT Class 9 Science Solutions & Notes
Complete chapter-wise NCERT textbook solutions, important questions, concept notes, key formulas, and diagrams for CBSE Class 9 Science.
Matter in Our Surroundings
Physical nature of matter, states of matter (solid, liquid, gas), evaporation, and latent heat.
Is Matter Around Us Pure?
Mixtures, solutions, suspensions, colloids, elements, compounds, and separation techniques.
Atoms and Molecules
Laws of chemical combination, Dalton's atomic theory, atomic mass, molecular mass, and mole concept.
Structure of the Atom
Subatomic particles (electrons, protons, neutrons), Thomson, Rutherford & Bohr models, valency, isotopes & isobars.
The Fundamental Unit of Life
Cell as the basic unit of life, plasma membrane, cell wall, nucleus, cytoplasm, and cell organelles.
Tissues
Plant tissues (meristematic & permanent) and animal tissues (epithelial, connective, muscular & nervous).
Motion
Distance and displacement, uniform vs non-uniform motion, speed, velocity, acceleration, and equations of motion.
Force and Laws of Motion
Balanced and unbalanced forces, Newton's three laws of motion, inertia and mass, and momentum conservation.
Gravitation
Universal law of gravitation, free fall, acceleration due to gravity (g), mass, weight, thrust, pressure & Archimedes' principle.
Work and Energy
Scientific conception of work, forms of energy, kinetic energy, potential energy, and law of conservation of energy.
Sound
Production and propagation of sound waves, longitudinal waves, characteristics of sound, speed of sound, echo, and ultrasound.
Improvement in Food Resources
Crop yield improvement, crop variety, crop production management, nutrients, manures, fertilizers, irrigation & animal husbandry.