CBSE Class 9th Science Revised Syllabus 2020-21

Unit No	Unit Marks	Marks	Periods
I	Matter – Its Nature and Behaviour	23	50
II	Organization in the Living World	20	45
III	Motion, Force and Work	27	60
IV	Our Environment	06	15
V	Food; Food Production	04	10
	Total	80
	Internal assessment	20
	Grand Total	100

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Theme: Materials (50 Periods)

Unit I: Matter-Nature and Behaviour

This unit covers the fundamental concepts of matter, including its definition and the different states it can exist in – solid, liquid, and gas. The characteristics of matter, such as its shape, volume, and density, will also be discussed, along with the changes of state that can occur – melting, freezing, evaporation, condensation, and sublimation.

The nature of matter will be explored, including the differences between elements, compounds, and mixtures. The different types of mixtures – heterogeneous and homogeneous mixtures, colloids, and suspensions – will also be examined.

The particle nature of matter will be discussed, focusing on atoms and molecules. The Law of Constant Proportions and the concept of atomic and molecular masses will also be covered. The mole concept, which relates the mass of particles to their numbers, will also be introduced.

The structure of atoms will be explored, including the roles of electrons, protons, and neutrons. The concept of valency and the chemical formula of common compounds will also be discussed. The differences between isotopes and isobars will also be examined.

Overall, this unit will provide a comprehensive understanding of matter and its properties, which is essential for understanding the world of living.

Theme: The World of the Living (45 Periods)

Unit II: Organization in the Living World

This unit focuses on the organization of living organisms, starting with the cell as the basic unit of life. The differences between prokaryotic and eukaryotic cells, as well as the structures and functions of various cell organelles, such as the cell membrane, cell wall, chloroplasts, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus, nucleus, and chromosomes, will be covered. Multicellular organisms and their specialized cells will also be discussed.

The unit will also cover the different levels of organization in living organisms, from tissues to organs, organ systems, and the organism as a whole. The structure and functions of animal and plant tissues, as well as meristematic and permanent tissues in plants, will be explored.

Biological diversity, including the basic issues in scientific naming and the basis of classification, will be discussed. The hierarchy of categories and groups, along with the major groups of plants (bacteria, Thallophyta, Bryophyta, Pteridophyta, gymnosperms, and angiosperms) and animals (non-chordates up to phyla and chordates up to classes), will be examined in detail.

Finally, the unit will cover the concept of health and its failure, including the differences between infectious and non-infectious diseases and their causes and manifestations. The diseases caused by viruses, bacteria, and protozoans, along with their prevention, treatment, and principles of prevention, will also be explored. The pulse polio programme will also be discussed.

Overall, this unit will provide a comprehensive understanding of the organization of living organisms, which is essential for understanding the world of moving things, people, and ideas.

Theme: Moving Things, People and Ideas (60 Periods)

Unit III: Motion, Force and Work

This unit focuses on the fundamental concepts of motion, force, gravitation, work, energy, power, and sound. The unit begins by covering the concepts of distance, displacement, velocity, acceleration, and uniform and non-uniform motion along a straight line. The distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, as well as the derivation of equations of motion by graphical method, will also be discussed. Additionally, an elementary idea of uniform circular motion will be explored.

The unit also covers the concept of force and Newton’s laws of motion. The action and reaction forces, inertia of a body, inertia and mass, momentum, force and acceleration, and the elementary idea of conservation of momentum will be discussed.

Gravitation and its universal law will be explored, including the force of gravitation of the earth (gravity), acceleration due to gravity, mass and weight, free fall, thrust, pressure, Archimedes’ principle, buoyancy, and the elementary idea of relative density.

The concepts of work, energy, and power will also be covered, including work done by a force, kinetic and potential energy, and the law of conservation of energy.

Finally, the unit will cover the nature of sound and its propagation in various media, speed of sound, range of hearing in humans, ultrasound, a reflection of sound, echo, and SONAR. The structure of the human ear (auditory aspect only) will also be explored.

Overall, this unit will provide a comprehensive understanding of the fundamental concepts of motion, force, gravitation, work, energy, power, and sound, which are essential for understanding the balance between nature and the world of natural resources.

Theme: Natural Resources: Balance in nature (15 Periods)

Unit IV: Our Environment

This unit will focus on physical resources such as air, water, and soil. Students will learn about the important role of air in respiration, combustion, and moderating temperatures. They will also study the movements of air and its role in bringing rain across India. Additionally, air, water, and soil pollution will be briefly introduced, including the issue of holes in the ozone layer and their probable damages.

The unit will also cover the concept of bio-geochemical cycles in nature, with a focus on the cycles of water, oxygen, carbon, and nitrogen. These cycles play a vital role in maintaining the balance in nature and are crucial for the survival of all living organisms.

Overall, this unit will give students a deeper understanding of the importance of physical resources and bio-geochemical cycles in maintaining a healthy and sustainable environment. This knowledge will be essential for students to understand the theme of food, which will be covered in the next unit.

Theme: Food (10 Periods)

Unit V: Food Production

This unit will cover topics related to plant and animal breeding and selection for quality improvement and management. Students will learn about the various techniques used to breed and select plants and animals for desirable traits, with a focus on quality improvement and effective management strategies.

The use of fertilizers and manures in agriculture will also be explored, including their benefits and potential drawbacks. Additionally, students will study methods for protecting crops and livestock from pests and diseases, with an emphasis on sustainable and environmentally-friendly approaches.

Organic farming will also be covered, including its principles and practices, as well as its potential advantages and limitations.

Overall, this unit will provide students with a comprehensive understanding of the various aspects of plant and animal management, from breeding and selection to fertilization and protection. This knowledge will be crucial for understanding the complex and interrelated processes involved in food production and agriculture.

CBSE Science Revised Syllabus 2020-21 for Class 9th

PRACTICALS (30 Periods)

Practicals should be conducted alongside the concepts tough in theory classes.

(LIST OF EXPERIMENTS)

Perform the following experiments and activities:

Unit-I

a) Prepare a solution of common salt, sugar, and alum, and distinguish between them on the basis of:

· transparency

· filtration criterion

· stability

b) Prepare a suspension of soil, chalk powder, and fine sand in water and distinguish between them on the basis of:

· appearance, i.e., homogeneity and heterogeneity

· behaviour towards settling down

· stability

c) Prepare a colloidal solution of starch in water and egg albumin/milk in water and distinguish between them on the basis of:

· transparency

· filtration criterion

· stability

Unit-I

a) Prepare a mixture and a compound using iron filings and sulfur powder and distinguish between them on the basis of:

· appearance, i.e., homogeneity and heterogeneity

· behaviour towards a magnet

· behaviour towards carbon disulphide as a solvent

· effect of heat

Unit-I

Separate the components of a mixture of sand, common salt, and ammonium chloride (or camphor) using appropriate techniques.

Unit-I

Perform the following reactions and classify them as physical or chemical changes:

a) Iron with copper sulfate solution in water

b) Burning of magnesium ribbon in air

c) Zinc with dilute sulfuric acid

d) Heating of copper sulfate crystals

e) Sodium sulfate with barium chloride in the form of their solutions in water

Unit-II

Prepare stained temporary mounts of (a) onion peel and (b) human cheek cells, record observations, and draw their labelled diagrams.

Identification of different plant tissues (parenchyma, collenchyma, and sclerenchyma) and animal tissues (striped, smooth, and cardiac muscle fibres and nerve cells) from prepared slides. Draw their labelled diagrams. Unit II
Determination of the melting point of ice and the boiling point of water. Unit-I
Verification of the Laws of reflection of light. Unit-III
Determination of the density of a solid (denser than water) by using a spring balance and a measuring cylinder. Unit-III
Establishing the relation between the loss in weight of a solid when fully immersed in:

a) Tap water. Unit-III

b) Strongly salty water with the weight of water displaced by it by taking at least two different solids. Unit-III

Determination of the speed of a wave propagated through a stretched string/slinky (helical spring). Unit III
Study of the characteristics of Spirogyra, Agaricus, Moss, Fern, Pinus (either with male or female cone), and an Angiospermic plant. Draw and give two identifying features of the groups they belong to. Unit-II
Observation of the given pictures/charts/models of earthworms, cockroaches, bony fish, and birds. For each organism, draw their picture and record:

a) One specific feature of its phylum.

b) One adaptive feature with reference to its habitat. Unit-II

Verification of the law of conservation of energy in a physical or chemical reaction. Unit-III
Study the external features of monocot and dicot plants’ root, stem, leaf, and flower. Unit-III

CBSE Science Revised Syllabus 2021-22 for Class 9th

CBSE Science Syllabus 2021-22 for Class 9

COURSE STRUCTURE CLASS 9 (Annual Examination):