NCERT Solutions For Class 9 Science All Chapters Physics, Chemistry & Biology download in PDF format in English and Hindi Medium. We have uploaded Class 9 NCERT Science Solutions to help the students to understand every chapter of the textbook. We have uploaded answers of the questions, exercises, lab manual and experiments list. The students of CBSE board and UP Board can download sample papers and study notes without any cost. These NCERT solutions can help you to score good marks in the exams because important questions solution must be read by the students. We have uploaded class 9 CBSE worksheets, Sample Papers and Practice Papers as well as Revision Notes. NCERT Books are available to download.
NCERT Solutions For Class 9 Science in English and Hindi Medium
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Class 9 Physics, Chemistry and Biology
There are 15 chapters in the textbook. Every chapter is related to the particular part like Physics, Chemistry and Biology.
Chapter 1 – Matter in Our Surroundings
The first chapter of the textbook deals with 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.
Chapter 2 – Is Matter Around Us Pure
This chapter deals with some common topics like compounds and mixtures. Heterogeneous and homogeneous mixtures, colloids and suspensions.
Chapter 3 – Atoms and molecules
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.
Chapter 4 – Structure of atoms
Electrons, protons and neutrons, valency, chemical formula of common compounds. Isotopes and Isobars.
Chapter 5 – 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.
Chapter 6 – Tissues
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).
Chapter 7 Diversity in Living Organisms
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, Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms). Major groups of animals (salient features) (Non Chordates up to phylum and chordates up to 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.
Chapter 8 MotioN
Distance and displacement, velocity; uniform and nonuniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, derivation of equations of motion by graphical method; elementary idea of uniform circular motion.
Chapter 9 – 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.
Chapter 10 – 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.
Chapter 11 – Work, energy and power
Work done by a Force, Energy, Power; Kinetic and Potential energy; Law of conservation of energy.
Chapter 12 – 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).
Chapter 13 – Why Do we fall ill?
In the chapter we learn about the reason of our falls.
Chapter 14 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.
Biogeochemical cycles in nature: Water, Oxygen, Carbon and Nitrogen.
Chapter 15 Improvements in Food Resources
Plant and animal breeding and selection for quality improvement and management; Use of fertilizers and manures; Protection from pests and diseases; Organic farming.
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