Welcome to your structured hub for NCERT Solutions for Class 9 Science, meticulously aligned with the latest CBSE syllabus and the official NCERT textbooks issued by the National Council of Educational Research and Training. Here you’ll find chapter-wise explanations in clear, student-friendly language, designed to help you master concepts, present answers step-by-step, and score more in school tests and future board exams. Use this page daily during exam preparation, pair it with sample papers, and extend your practice with NCERT exemplar solutions to strengthen reasoning and higher order thinking skill.
Each chapter section below includes quick links (anchors) to In-text Questions, End-exercise Questions, Important MCQs, Short/Long Answers, Practical-based items, and HOTS. If you need the base text, you can download NCERT book for class 9 Science from trusted academic portals and cross-check the question numbering. With consistent practice and clean presentation, these solutions will support your progress across science and maths in Classes 9–10.
How to use these NCERT Solutions effectively
- Concept → Example → Practice: Read the concept in the NCERT textbooks, see our solved example, then attempt similar questions.
- Write steps: Use neat diagrams, labelled units, and crisp reasoning—this mirrors evaluation in board exams.
- Mix practice: Attempt In-text, End-exercise, then NCERT exemplar solutions and sample papers to build speed.
- Reflect: After each chapter, list three mistakes and fix them. This habit steadily improves exam preparation.
Class 9 Science — Chapter Index
| S.No. | Chapter | Go to |
|---|---|---|
| 1 | Matter in Our Surroundings | # |
| 2 | Is Matter Around Us Pure | # |
| 3 | Atoms and Molecules | # |
| 4 | Structure of the Atom | # |
| 5 | The Fundamental Unit of Life | # |
| 6 | Tissues | # |
| 7 | Diversity in Living Organisms | # |
| 8 | Motion | # |
| 9 | Force and Laws of Motion | # |
| 10 | Gravitation | # |
| 11 | Work, Power and Energy | # |
| 12 | Sound | # |
| 13 | Why Do We Fall Ill | # |
| 14 | Natural Resources | # |
| 15 | Improvement in Food Resources | # |
Chapter 1: Matter in Our Surroundings
This chapter explains physical nature of matter, particulate theory, and the three common states—solid, liquid, gas—through concepts like intermolecular space, attraction, and kinetic energy. You’ll learn characteristics (shape, volume, compressibility), effects of temperature and pressure, diffusion, evaporation, and factors affecting evaporation (surface area, wind speed, humidity, temperature). For exam preparation, write definitions precisely and support with everyday examples (wet clothes drying, earthen pots cooling). Draw neat particle diagrams where asked—presentation matters in board exams. Refer to the NCERT textbooks illustrations, and extend practice using NCERT exemplar solutions and sample papers. These fundamentals also support later physics and chemistry topics across science and maths.
| Section | Anchor | What it covers |
|---|---|---|
| In-text Questions | # | Concept checks after subtopics; short reasoning with examples. |
| NCERT Exercise | # | Definitions, reasoning, numericals on evaporation and cooling. |
| MCQs & VSA | # | One-liners on properties, diffusion, latent heat. |
| Short/Long Answers | # | State changes, factors affecting evaporation, applications. |
| Practical-based | # | Observations on evaporation, cooling, diffusion experiments. |
| HOTS | # | Real-life reasoning; compare evaporation vs. boiling. |
Chapter 2: Is Matter Around Us Pure
Learn the difference between pure substances (elements/compounds) and mixtures (homogeneous/heterogeneous), along with separation techniques: evaporation, crystallisation, filtration, centrifugation, sublimation, distillation, fractional distillation, chromatography. Understand physical vs chemical changes through examples. Answer definitions exactly from the NCERT textbooks and annotate flowcharts for separation—a frequent expectation in the CBSE syllabus. Practise reasoning steps; many questions target higher order thinking skill, such as choosing the most appropriate separation method for a given scenario. Pair with NCERT exemplar solutions for challenge sets and sample papers to build speed.
| Section | Anchor | What it covers |
|---|---|---|
| In-text Questions | # | Mixture classification; method selection. |
| NCERT Exercise | # | Flowcharts; purity tests; methods’ principles. |
| MCQs & VSA | # | True/False, matchings on processes and setups. |
| Short/Long Answers | # | Comparisons (distillation vs. fractional distillation, etc.). |
| Practical-based | # | Chromatography strips, crystallisation steps, safety. |
| HOTS | # | Industrial contexts; water purification caselets. |
Chapter 3: Atoms and Molecules
Build chemistry language: laws of chemical combination, Dalton’s atomic theory (scope and limits), symbols, atomic/molecular masses, mole concept (intro), and balanced equations. Show working clearly for formula writing and mass calculations. These steps are essential for accuracy in board exams and future chemistry topics. For rigorous exam preparation, attempt representative numericals and verify answers with units—an emphasis across the CBSE syllabus.
Chapter 4: Structure of the Atom
Trace models from Thomson to Rutherford to Bohr; understand atomic number, mass number, isotopes, isobars, and electronic configuration (up to atomic number 20). Draw tidy shell diagrams and write configurations as 2,8,8,2 etc. Be precise with definitions and applications (e.g., uses of isotopes). Revise with NCERT exemplar solutions and sample papers to sharpen conceptual and application questions.
Chapter 5: The Fundamental Unit of Life
A biology foundation: cell theory, prokaryotic vs eukaryotic, cell organelles (membrane, wall, nucleus, ER, Golgi, mitochondria, plastids, vacuoles, lysosomes). In diagrams, label left-to-right neatly. Present functions in concise bullet points. Practical-style questions often ask observation tables—align your answers to NCERT textbooks.
Chapter 6: Tissues
Plant tissues (meristematic & permanent) and animal tissues (epithelial, connective, muscular, nervous). Use comparison tables—structure, location, function—since this mirrors CBSE syllabus expectations. Diagrams must be simple and clean; examiners value accurate labelling during board exams too.
Chapter 7: Diversity in Living Organisms
Classification principles and major groups (Monera, Protista, Fungi, Plantae, Animalia) with characteristics. Focus on hierarchical levels, binomial nomenclature basics, and key examples. Use crisp bullets to present traits—a scoring approach in exam preparation.
Chapter 8: Motion
Kinematics introduction: distance vs displacement, speed vs velocity, acceleration, graphical analysis (s-t, v-t), equations of motion (derivations may be asked). Always attach units and show steps in numericals. Graph reading is a favorite theme in sample papers and board exams.
Chapter 9: Force and Laws of Motion
Newton’s laws, inertia, balanced/unbalanced forces, action-reaction, and momentum conservation. For numericals, list given data, formula, substitution, and final units. Short reasoning questions often target misconceptions—revise from NCERT textbooks examples and extend with NCERT exemplar solutions.
Chapter 10: Gravitation
Universal law of gravitation, free fall, acceleration due to gravity (g), mass vs weight, thrust/pressure, Archimedes’ principle, relative density. Draw tidy force diagrams. Show dimensional consistency in numericals. These themes recur in exam preparation sets.
Chapter 11: Work, Power and Energy
Work (W = F·s), energy forms, kinetic/potential energy formulae, power and units. Keep track of directions and sign conventions. Many short numericals appear in sample papers; show formula → substitution → units for full credit in board exams.
Chapter 12: Sound
Production and propagation, sound speed factors, wavelength/frequency relations, echo, reverberation, SONAR basics, human ear structure. Draw labelled diagrams (ear, waveforms). Provide numerical steps clearly and state assumptions (temperature, medium) when given in the NCERT textbooks.
Chapter 13: Why Do We Fall Ill
Health vs disease, acute/chronic, infectious vs non-infectious, disease agents, prevention & public health. Use structured answers (cause → symptoms → prevention → treatment). Cite examples relevant to everyday life; this chapter frequently tests reasoning in exam preparation sets.
Chapter 14: Natural Resources
Air, water, soil resources, biogeochemical cycles (water, carbon, nitrogen, oxygen), and human impact. Draw cycle diagrams simply and label arrows clearly. Many short answers are direct from the NCERT textbooks, so revise line-by-line before attempting sample papers.
Chapter 15: Improvement in Food Resources
Crop production management (variety improvement, crop protection, nutrient management, irrigation), animal husbandry (cattle, poultry, fishery), storage and preservation. Present step-wise measures and advantages/limitations—this structure matches the CBSE syllabus and earns method marks in board exams. Connect learnings to food security and sustainability; such higher order thinking skill questions are common in sample papers.
Download & Practice
- NCERT Solutions for Class 9 Science — PDF (All Chapters)
- Chapter-wise Important Questions (MCQ, VSA, SA, LA)
- NCERT Exemplar Solutions — Selected Problems
- CBSE Sample Papers & Practice Tests
Exam Tips & Strategy
- Read, then write: Learn from NCERT textbooks, then immediately solve end-exercise questions.
- Present well: Label diagrams, show units, write final statements—crucial for board exams.
- Space your practice: Mix chapters daily to mirror the CBSE syllabus spread.
- Time yourself: Use sample papers under exam-like conditions to improve speed and accuracy.
- Reflect & revise: Maintain a formula/diagram diary and review weak areas weekly.
Explore each chapter’s sections, practise steadily, and—when needed—download NCERT book for class 9 Science to verify question order. Extend with NCERT exemplar solutions and sample papers to build strong conceptual understanding and higher order thinking skill. Consistent effort now sets you up for success in Class 10 and beyond.