Science-Class IX

Once Albert Einstein said "Science without religion is lame, religion without science is blind."

Science is a method of investigating nature-a way of knowing about nature--that discovers reliable knowledge about it. Here you may study all the chapters of CBSE class - 9 by the experts of Science to succeed in this science course.

  • Course Module Based Learning
  • Online Classes with Live Tutor
  • Chapter-wise Assignments
  • MCQs based Online Test
  • More Than 100 Classes
  • Repetition Possible for Missed Classes
  • Performance Analysis and Report
  • Recorded Lectures for Revision
  • Free child psychology session
  • Query Resolving Classes
    • Unit: I
    • Matter - Its Nature & 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.

    Particle nature, basic units

    Atoms and molecules, Law of constant proportions, Atomic and molecular masses. Mole concept : Relationship of mole to mass of the particles and numbers.

    Structure of atoms

    Electrons, protons and neutrons, valency, chemical formula of common compounds. Isotopes 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; 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 (four types in animals; meristematic and permanent tissues in plants).

    Biological Diversity

    Diversity of plants and animals - basic issues in scientific naming, basis of classification. Hierarchy of categories / groups, Major groups of plants (salient features) (Bacteria, Thalophyta, Bryo phyta, Pteridophyta, gymnosperms and Angiosperms). Major groups of animals (salient features) (Non-chordates upto phyla and chordates upto classes).

    Health and Diseases

    Health and its failure. Infectious and Non-infectious diseases, their causes and manifestation. Diseases caused by microbes (Virus, Bacteria and protozoans) and their prevention, Principles of treatment and prevention. Pulse Polio programmes.

    • 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, equations of motion by graphical method; 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. Elementary idea of conservation of Momentum.

    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, elementary idea of relative density.

    Work, energy and power

    Work done by a force, energy, power; kinetic and potential energy; law of conservation 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 and SONAR. Structure of the human ear (auditory aspect only).

    • Unit: IV
    • Our Environment

    Physical resources

    Air, Water, Soil. Air for respiration, for combustion, for moderating temperatures; movements of air and its role in bringing rains across India.

    Air, water and soil pollution (brief introduction). Holes in ozone layer and the probable damages.

    Bio-geo chemical cycles in nature

    Water, oxygen, carbon and nitrogen.

    • Unit: V
    • Food; Food Production

    Plant and animal breeding and selection for quality improvement and management; use of fertilizers, manures; protection from pests and diseases; organic farming.