Class Notes NCERT Solutions for CBSE Students
CBSE Class 9 Science Syllabus 2024: The syllabus consists of four units: (i) Matter (ii) Organization in the Living World (iii) Motion, Force and Work (iv) Food, Food Production.
Exam Structure: CBSE Class 9 Science Syllabus 2024
| Units | Marks | |
| I | Matter – Its Nature & Behaviour | 25 |
| II | Organization in the Living World | 22 |
| III | Motion, Force and Work | 27 |
| IV | Food; Food Production | 6 |
| Total | 80 | |
Unit I: Matter – Nature and Behaviour
Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state – melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.
Nature of matter: Elements, compounds and mixtures. Heterogenous and homogenous mixtures, colloids and suspensions. Physical and chemical changes (excluding separating the components of a mixture).
Particle nature and their basic units: Atoms and molecules, Law of constant proportions, Chemical formula of common compounds Atomic and molecular masses.
Structure of atoms: Electrons, protons and neutrons, Valency, Atomic Number and Mass Number, Isotopes and Isobars.
Unit II: Organization in the Living World
Cell – Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.
Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).
Unit III: Motion, Force and Work
Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, elementary idea of uniform circular motion.
Force and Newton’s laws: Force and Motion, Newton’s Laws of Motion, Action and reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration.
Gravitation: Gravitation; Universal Law of Gravitation, Force of gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall.
Floatation: Thrust and pressure. Archimedes’ principle, Buoyancy.
Work, Energy and Power: Work done by a force, energy, power; kinetic and potential energy; law of conservation of energy (excluding commercial unit of Energy).
Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.
Unit IV: Food Production – CBSE Class 9 Science Syllabus
Plant and animal breeding and selection for quality improvement and management; use of fertilizers and manures; Protection from pests and diseases; Organic farming.
