Science Class 9 Support Material, Science is the study of the natural and physical world. Science in class 9 is an important stage for the students; we includes clear fundamental concepts like notes, NCERT solutions, important MCQs and important questions and answers. Science helps to understand everyday things like why the sky is blue, how food gives energy, why seasons change, etc.
Science Class 9 Support Material
- Science Class 9 Notes
- Science Class 9 NCERT Solutions
- Science Class 9 Extra MCQs
- Science Class 9 Extra Questions and Answers
Science education aims to achieve scientific understanding of the natural and physical world, capacities for scientific inquiry, and understanding of the evolution of scientific knowledge. Interdisciplinary understanding between science and other curricular areas; Understanding of the relationship between science, technology and society; Scientific temper and creativity.
NEP 2020 brings big changes in science education; as per NEP 2020, now the education is inquiry-based, hands-on, and competency-driven learning, which helps to emphasise critical thinking, creativity, interdisciplinary connection, technology integration, and real-world application.
Unit I: Matter – Nature and Behaviour
- Matter in Our Surroundings: Definition of matter; particulate nature of matter; states of matter: solid, liquid and gas and their characteristics; change of state – melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.
- Is Matter Around Us Pure: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions. Physical and chemical changes (excluding separating the components of a mixture); pure and impure substances.
- Atoms and Molecules: Atoms and molecules, the law of chemical combination, the chemical formula of common compounds, and atomic and molecular masses.
- Structure of atom: Subatomic particles: electrons, protons and neutrons; models of atoms; valency, Atomic Number and mass number; isotopesatomic number and isobars.
Unit II: Organisation 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 Systems, Organisms: 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, and the 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, and 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.
- Flotation: Thrust and Pressure. Archimedes’ Principle: Buoyancy. Work, Energy and Power: Work done by a force, energy, power, kinetic and potential energy, and the law of conservation of energy (excluding commercial units of energy).
- Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans, ultrasound, reflection of sound, and echo.
Unit IV: Food Production
- Plant and animal breeding and selection for quality improvement and management; use of fertilisers and manures; protection from pests and diseases; organic farming.
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