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CBSE Class 9 Science Revision Notes
Get Here free PDF download of CBSE Class 9 Science revision notes and short key-notes to score more marks in your exams. These Notes of Science Class 9 make the complicated problems look easy as they are broken into simple steps with a lucid explanation of each step. Handwritten Notes of Physics for Class 9 are important to enable students to have a quick recap of the entire syllabus in no time. One can easily revise the precise notes in a day or two. This helps one to recall all he/she has read and practice for the entire year. Once they get the hint, the students are quick to recall the entire material. Study Key Notes or Revision notes helps students in quick revision to recall all that has been learned throughout the year. Notes make this process of recall easy.
| Class 9 Science Marks Distribution | |
|---|---|
| Units | Marks |
| Matter - Its Nature and Behaviour | 23 |
| Organisation in the Living World | 20 |
| Motion, Force and Work | 27 |
| Our Environment | 06 |
| Food; Food Production | 04 |
| Total | 80 |
| Internal assessment | 20 |
| Grand Total | 100 |
CBSE Class 9 Science Syllabus - Updated 2022
- Matter in our surroundings
- Is Matter Around Us Pure
- The Fundamental Unit Of Life
- Tissues
- Motion
- Force and Laws of Motion
- Diversity In Living Organism
- Improvement In Food Resources
- Gravitation
- Natural Resources
- Atoms And Molecules
- Structure Of The Atom
- Why Do We Fall ill
- Work and Energy
- Sound
- Heredity and evolution
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. Heterogeneous and homogenous mixtures, colloids, and suspensions.
- Particle nature and their 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, neutrons, valency, the chemical formula of common compounds. 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).
- Biological Diversity: Diversity of plants and animals-basic issues in scientific naming, the 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) (Nonchordates up to phyla 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.
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, derivation of 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; Freefall.
- 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; a 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 the ozone layer and the probable damages.
- Bio-geo chemical cycles in nature: Water, Oxygen, Carbon, and Nitrogen.
Unit V: Food Production
Plant and animal breeding and selection for quality improvement and management; Use of fertilizers and manures; Protection from pests and diseases; Organic farming.
CBSE Class 9 Science Syllabus 2022-23 Practical Exams
Below is the list of experiments prescribed by CBSE for Class 9 Science:
1. Preparation of
- a true solution of common salt, sugar, and alum
- a suspension of soil, chalk powder, and fine sand in water
- a colloidal solution of starch in water and egg albumin/milk in water and distinguish between these based on
- Transparency
- filtration criterion
- stability
2. Preparation of
- A mixture
- A compound
Using iron filings and sulphur powder and distinguishing between these based on:
- appearance, i.e., homogeneity and heterogeneity
- behaviour towards a magnet
- behaviour towards carbon disulfide as a solvent
- effect of heat
3. Separation of the components of a mixture of sand, common salt, and ammonium chloride (or camphor).
4. Perform the following reactions and classify them as physical or chemical changes:
- Iron with copper sulphate solution in water
- Burning of magnesium ribbon in air
- Zinc with dilute sulphuric acid
- Heating of copper sulphate crystals
- Sodium sulphate with barium chloride in the form of their solutions in water
5. Preparation of stained temporary mounts of
- onion peel
- human cheek cells & to record observations and draw their labelled diagrams.
6. Identification of Parenchyma, collenchyma, and Sclerenchyma tissues in plants, striped, smooth, and cardiac muscle fibres and nerve cells in animals, from prepared slides. Draw their labelled diagrams.
7. Determination of the melting point of ice and the boiling point of water.
8. Verification of the Laws of reflection of sound.
9. Determination of the density of solid (denser than water) by using a spring balance and a measuring cylinder.
10. Establishing the relation between the loss in weight of a solid when fully immersed in
- Tap water
- Strongly salty water with the weight of water displaced by it by taking at least two different solids.
11. Determination of the speed of a pulse propagated through a stretched string/slinky (helical spring).
12. 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.
13. Observe the given pictures/charts/models of earthworm, cockroach, bony fish, and bird. For each organism, draw their picture and record:
- One specific feature of its phylum.
- One adaptive feature regarding its habitat.
14. Verification of the law of conservation of mass in a chemical reaction.
15. Study of the external features of root, stem, leaf, and flower of monocot and dicot plants.
Prescribed Books for CBSE Class 9 Science
CBSE has prescribed 4 textbooks to cover the CBSE Class 9 Science syllabus for the academic session 2022-23. These books include the textbook, practical book, and exemplar as mentioned below:
- Science Textbook for Class IX-NCERT Publication
- Assessment of Practical Skills in Science-Class IX – CBSE Publication
- Laboratory Manual-Science-Class IX, NCERT Publication
- Exemplar Problems Class IX – NCERT Publication
For Preparation of exams students can also check out other resource material
CBSE Class 9 Science Sample Papers
CBSE Class 9 Science Worksheets
CBSE Class 9 Science Test Papers
Revision Notes of Other Subjects of Class 9
CBSE Revision Notes of Class 9 Mathematics CBSE Revision Notes of Class 9 English CBSE Revision Notes of Class 9 Social Science CBSE Revision Notes of Class 9 Foundation of Information Technology (FIT)Number of students believe that making notes is a troublesome act. But it is a hard known fact that with proper study notes, studying and passing exams becomes easier and that too with good marks. More importantly, it makes learning more interesting and fun.
Why Should Students make Revision Notes?
1. When students make notes, they are forced to understand everything in their own language and words so that you understand things better. Often students tend to blindly read the entire page without giving a chance to understand a single word, but in case they are making notes then, then the brain gets double activated and tries to squeeze meaning out of every single sentence which is very much beneficial for them in the long run. Study notes keep track of all the information they have learned from them. It acts as a ready referral to go through during preparing for exam time.
2. The extra pain of writing notes while studying pays a lot of dividends like saving student’s energy and time during the exam and it becomes an immensely easier way to recall things during exam time when students are already facing shortage of time.
3. When students write notes on paper while studying, it automatically improves memory, allowing the students to study more when studying and reducing the chances of forgetting.
4. When students inculcate the habit of study notes making while studying it increases attention to detail and the focus of the students. And it is a known fact that students who have good focus are more likely to do better in exams.
5. When it comes to learning, it has been observed that study notes do promote a high level of retention. When learning is an important part of tutoring, one of the major necessary end goals is retention. So when a student indulges in notes making , the study notes promotes positive memory as well as the ability to retain information because the mind becomes an active component in studying.
6. Repetition is the key to mastery. A well known fact gets also implied in the case of Making study notes, because when students study then he instantly revises everything while making notes and that stimulates the part of the brain that promotes learning. Like every muscle in the body, the brain can be trained to learn easily in order to absorb new and more information quickly.
7. Making study notes helps in filtration of the relevant and important information. When the student writes study notes while studying, they tend to make the notes by summarising, editing and retaining only the most important information.
8. Making study notes passively increases the likelihood of the students to become more organised. Being organised allows students to prioritise tasks and to finish work on time.