Based on the CBSE Class 9 Science syllabus — Code 086 (2026-27)
CBSE Class 9 Science: Syllabus, Chapters & Sample Practice
Explore all four units of the redesigned NCF-SE 2023 integrated syllabus — Biology, Chemistry, Physics and Earth Science — mapped to their chapters and marks, see how the 80 + 20 annual assessment works, and work through a stepped demonstration question.
Key Curriculum Facts
- 80 marks
- Theory Paper
- 3-hour annual examination
- 20 marks
- Internal Assessment
- Periodic, portfolio & practical
- World of Living (27)
- Highest-weight Unit
- Tied with Matter (25)
What the Class 9 Science Year Really Builds
CBSE Class 9 Science is taught as a single integrated course that combines Biology, Chemistry, Physics and Earth Science. The 2026-27 syllabus has been redesigned in line with NEP 2020 and NCF-SE 2023, so it emphasises scientific inquiry, evidence-based thinking and real-life relevance alongside conceptual understanding.
The course is organised into four assessment units. World of Living and Matter carry the largest share of the 80-mark annual paper, with Motion, Force, Work and Sound close behind and Earth as a System completing the course.
This page shows EduMagik's stepped reasoning approach with a worked demonstration question: a clue first, then a full step-by-step solution, so the method is understood rather than just the answer.
Complete Unit & Chapter Directory (CBSE Science, Class 9)
The four official Class 9 assessment units with their chapters and theory-paper mark weightings (total 80)
Unit I — World of Living (27 marks)
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Ch 1
Cell
Plant and animal cells; prokaryotic and eukaryotic cells; structure and function of key organelles; diffusion and osmosis.
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Ch 2
Tissues
Plant and animal tissues; meristematic and permanent tissues; the musculoskeletal system and its care.
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Ch 3
Reproduction
Sexual and asexual reproduction; reproduction in flowering plants and in humans; reproductive health.
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Ch 4
Diversity
Classification; the five kingdoms; binomial nomenclature; acellular entities (viruses).
Unit II — Matter: Its Nature and Behaviour (25 marks)
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Ch 1
Exploring Mixtures and their Separation
Homogeneous and heterogeneous mixtures; solutions, suspensions and colloids; concentration; separation techniques.
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Ch 2
Structure of an Atom
Subatomic particles; atomic models (Thomson, Rutherford, Bohr); electron distribution, valency, isotopes and isobars.
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Ch 3
Atoms and Molecules
Laws of conservation of mass and constant proportion; Dalton’s atomic theory; ions; chemical formulae; molecular and formula unit mass.
Unit III — Motion, Force, Work and Sound (23 marks)
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Ch 1
Motion
Displacement, velocity and acceleration; graphical representation of motion; kinematic equations; uniform circular motion.
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Ch 2
Force and Laws of Motion
Balanced and unbalanced forces; friction; Newton's three laws of motion and their everyday applications.
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Ch 3
Work, Energy and Simple Machines
Work done by a force; the work-energy theorem; kinetic and potential energy; conservation of energy; power; simple machines.
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Ch 4
Sound
Production and propagation of sound as a longitudinal wave; characteristics of a sound wave (wavelength, frequency, amplitude, speed).
Unit IV — Earth as a System (5 marks)
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Ch 1
Earth as a System: Energy, Matter & Life
Interconnected spheres of the Earth; solar energy and differential heating; biogeochemical cycles (water, carbon, nitrogen, oxygen); human impact.
A car starts from rest and reaches a velocity of 20 m/s in 5 seconds, moving in a straight line. What is its acceleration?
Reasoning Clue & Solution
Acceleration is the change in velocity divided by the time taken: a = (v − u) ÷ t. The car "starts from rest", so u = 0.
The EduMagik 3-Step Hint Ladder
Point to the Method
Names the tool to reach for (e.g. "Use a = (v − u) ÷ t") without giving the answer.
Guided Reasoning Prompt
Prompts the key idea (e.g. "What does 'starts from rest' tell you about the initial velocity u?").
Complete Worked Solution
Shows the full step-by-step working and explains why the answer is correct.
How to Revise Class 9 Science
Simple, high-impact ways to build a strong secondary-stage foundation
Learn the Three Strands Side by Side
Biology, Chemistry and Physics each need their own habits — diagrams and definitions for biology, equations and units for chemistry and physics.
Focus Practice on High-Weight Units
World of Living (27) and Matter (25) carry the most marks, so steady weekly practice there pays off most.
Do the Practicals, Not Just the Theory
Hands-on experiments (osmosis, separating mixtures, verifying the laws of motion) make the concepts stick and feed your internal assessment.
Frequently Asked Questions
How many units are in the CBSE Class 9 Science syllabus?
The 2026-27 CBSE Class 9 Science syllabus (code 086) has four assessment units: World of Living, Matter – Its Nature and Behaviour, Motion, Force, Work and Sound, and Earth as a System. Always confirm the current syllabus with CBSE or your school.
How is CBSE Class 9 Science assessed?
An 80-mark annual theory paper (3 hours) plus 20 marks of internal assessment — periodic assessment (5), multiple assessment (5), portfolio (5) and subject enrichment / practical work (5) — totalling 100.
Which units carry the most marks in Class 9 Science?
World of Living (27) and Matter – Its Nature and Behaviour (25) carry the most, followed by Motion, Force, Work and Sound (23) and Earth as a System (5).
Is there a Standard and an Advanced level for Class 9 Science?
Class 9 Science (code 086) is the regular course all students take. For 2026-27, CBSE also publishes a separate optional "Science at Advanced Level" for Grade 9 as enrichment — it is not a Basic-versus-Standard board split like Class 10 Maths. Confirm availability with CBSE or your school.
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