Brief introduction to each chapter of NCERT Exemplar Class 9 Science Solutions
Chapter 1: Matter in Our Surroundings
Introduces the concept of matter, its physical states (solid, liquid, gas), properties, and interconversion with examples from daily life.
Chapter 2: Is Matter Around Us Pure?
Explains pure substances, mixtures, solutions, suspensions, and colloids, along with separation techniques.
Chapter 3: Atoms and Molecules
Covers Dalton’s Atomic Theory, laws of chemical combination, writing chemical formulas, and mole concept.
Chapter 4: Structure of the Atom
Introduces atomic models (Thomson, Rutherford, Bohr), electronic configuration, and discovery of subatomic particles.
Chapter 5: The Fundamental Unit of Life
Explains cell structure, organelles, cell theory, and functions of various components like nucleus, mitochondria, and plastids.
Chapter 6: Tissues
Differentiates plant and animal tissues, their types, structures, and functions with diagrams and examples.
Chapter 7: Diversity in Living Organisms
Discusses classification of organisms into kingdoms, their features, and basis of classification.
Chapter 8: Motion
Introduces distance, displacement, speed, velocity, acceleration, graphical representation of motion, and equations of motion.
Chapter 9: Force and Laws of Motion
Explains Newton’s three laws of motion, inertia, momentum, and applications in daily life.
Chapter 10: Gravitation
Covers universal law of gravitation, free fall, acceleration due to gravity, mass vs. weight, buoyancy, and Archimedes’ principle.
Chapter 11: Work and Energy
Defines work, power, and energy, with concepts like kinetic and potential energy, and conservation of energy.
Chapter 12: Sound
Explains production, propagation, and properties of sound waves, speed of sound, reflection, and applications like SONAR.
Chapter 13: Why Do We Fall Ill?
Focuses on health, disease, causes of diseases, infectious vs. non-infectious diseases, and prevention.
Chapter 14: Natural Resources
Explains air, water, soil as resources, biogeochemical cycles, and the need for sustainable management of resources.
Chapter 15: Improvement in Food Resources
Covers crop production, animal husbandry, crop variety improvement, and sustainable practices for better food yield.