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Science Complete Guide

Syllabus, official resources, chapter guides, textbook solutions, question bank, model papers, revision plan, exam tips, and FAQs.

Chapters

25

Published Guides

64

Chapter Guides

25/25

Practice Resources

10

📝 Textbook Exercise Solutions — Chapter-wise

MCQ, short answers, long answers, and numericals with full worked solutions

View All Solutions →

Subject Roadmap

Mapped

25 Science chapters arranged by unit for Class 9.

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Syllabus and Official Resources

Official-first

3 syllabus focus areas with Tamil Nadu textbook resources as the primary source.

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Chapter Summaries

Live

25 published chapter guides available for Science.

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Textbook Exercise Solutions

Planned

Chapter-wise MCQ, short answers, long answers, and numericals with worked solutions.

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Important Questions

Ready

5 question patterns are listed for one-mark, short-answer, and long-answer practice.

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Model Papers

Live

2 model paper resource pages are published.

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Revision Plan

Live

A Class 9 Science revision plan is available for weekly study cycles.

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Exam Tips

Subject-specific

Exam guidance focuses on science presentation, keywords, time use, and common mistakes.

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FAQs

In guides

FAQs are included inside individual guides so answers stay close to the exact chapter or resource.

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Syllabus Roadmap

  • Official Tamil Nadu Class 9 Science: Physics, Chemistry, Biology, Environmental Science, and computer applications from the current SCERT book.
  • Covers 25 units from Measurement to LibreOffice Impress.
  • Includes definitions, formulae, diagrams, activities, experiment support, important questions, and model paper practice.

Official Books

Use official Tamil Nadu textbook resources first, then study with KalviGavani chapter guides.

Open TN Textbook Source

Chapter Dashboard

25/25 chapter guides published

Unit 1 · Physics · Chapter 1

Measurement

Live
Open guide

Unit 2 · Physics · Chapter 2

Motion

Live
Open guide

Unit 3 · Physics · Chapter 3

Fluids

Live
Open guide

Unit 4 · Physics · Chapter 4

Electric Charge and Electric Current

Live
Open guide

Unit 5 · Physics · Chapter 5

Magnetism and Electromagnetism

Live
Open guide

Unit 6 · Physics · Chapter 6

Light

Live
Open guide

Unit 7 · Physics · Chapter 7

Heat

Live
Open guide

Unit 8 · Physics · Chapter 8

Sound

Live
Open guide

Unit 9 · Physics · Chapter 9

Universe

Live
Open guide

Unit 10 · Chemistry · Chapter 10

Matter Around Us

Live
Open guide

Unit 11 · Chemistry · Chapter 11

Atomic Structure

Live
Open guide

Unit 12 · Chemistry · Chapter 12

Periodic Classification of Elements

Live
Open guide

Unit 13 · Chemistry · Chapter 13

Chemical Bonding

Live
Open guide

Unit 14 · Chemistry · Chapter 14

Acids, Bases and Salts

Live
Open guide

Unit 15 · Chemistry · Chapter 15

Carbon and its Compounds

Live
Open guide

Unit 16 · Chemistry · Chapter 16

Applied Chemistry

Live
Open guide

Unit 17 · Biology · Chapter 17

Animal Kingdom

Live
Open guide

Unit 18 · Biology · Chapter 18

Organization of Tissues

Live
Open guide

Unit 19 · Biology · Chapter 19

Plant Physiology

Live
Open guide

Unit 20 · Biology · Chapter 20

Organ Systems in Animals

Live
Open guide

Unit 21 · Biology · Chapter 21

Nutrition and Health

Live
Open guide

Unit 22 · Biology · Chapter 22

World of Microbes

Live
Open guide

Unit 23 · Biology · Chapter 23

Economic Biology

Live
Open guide

Unit 24 · Environmental Science · Chapter 24

Environmental Science

Live
Open guide

Unit 25 · Computer Science · Chapter 25

LibreOffice Impress

Live
Open guide

Question Bank

  • Definitions, units, and examples
  • Activity observations and labelled diagrams
  • Formula and numerical questions
  • Difference-between and reason questions
  • Computer and practical science terms

Model Papers

  • After each unit, solve a short unit test.
  • After every major section, revise mistakes before moving to the next unit.
  • In the final month, write one full subject model paper every week.
  • Use the last revision cycle only for weak topics, formulae, diagrams, grammar rules, maps, or key terms.

Revision Plan

  • Week 1: Read the official textbook and mark glossary, formulae, dates, rules, and diagrams.
  • Week 2: Complete textbook exercises and correct repeated mistakes.
  • Week 3: Practise important questions, unit tests, diagrams, maps, grammar, and writing formats.
  • Week 4: Write model papers and revise only the mistake notebook.

Published Chapter Guides

chapter-guide

Tamil Nadu Class 9 Science Animal Kingdom — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Animal Kingdom covering classification, animal phyla, vertebrates and invertebrates.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Atomic Structure — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Atomic Structure guide covering subatomic particles, Bohr model, and electronic configuration.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Carbon and Its Compounds — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Carbon and Its Compounds covering covalent bonds, hydrocarbons, functional groups, and isomers.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Fluids — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Fluids guide covering pressure in fluids, Archimedes principle, Pascal's law, and Bernoulli's theorem.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Measurement — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Measurement guide covering SI units, significant figures, errors, and instruments for board exams.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Motion — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Motion guide covering types of motion, speed, velocity, acceleration, and equations of motion.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science Nutrition and Health — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Nutrition and Health covering food nutrients, deficiency diseases, and balanced diet.

11 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Acids, Bases and Salts

Samacheer Kalvi Class 9 Science Acids, Bases and Salts guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Applied Chemistry

Samacheer Kalvi Class 9 Science Applied Chemistry guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Chemical Bonding

Samacheer Kalvi Class 9 Science Chemical Bonding guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Economic Biology

Samacheer Kalvi Class 9 Science Economic Biology guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Electric Charge and Electric Current

Samacheer Kalvi Class 9 Science Electric Charge and Electric Current guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Environmental Science

Samacheer Kalvi Class 9 Science Environmental Science guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Heat

Samacheer Kalvi Class 9 Science Heat guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: LibreOffice Impress

Samacheer Kalvi Class 9 Science LibreOffice Impress guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Light

Samacheer Kalvi Class 9 Science Light guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Magnetism and Electromagnetism

Samacheer Kalvi Class 9 Science Magnetism and Electromagnetism guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Matter Around Us

Samacheer Kalvi Class 9 Science Matter Around Us guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Organ Systems in Animals

Samacheer Kalvi Class 9 Science Organ Systems in Animals guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Organization of Tissues

Samacheer Kalvi Class 9 Science Organization of Tissues guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Periodic Classification of Elements

Samacheer Kalvi Class 9 Science Periodic Classification of Elements guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Plant Physiology

Samacheer Kalvi Class 9 Science Plant Physiology guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Sound

Samacheer Kalvi Class 9 Science Sound guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: Universe

Samacheer Kalvi Class 9 Science Universe guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 9 Science: World of Microbes

Samacheer Kalvi Class 9 Science World of Microbes guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

Exercise Solutions

Chapter-wise textbook answers with a quick path back to notes.

View all solutions →
Ch 10

Matter Around Us

Complete TN Class 9 Science Chapter 1 Matter Around Us exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 1

Measurement

Complete TN Class 9 Science Chapter 1 Measurement exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 2

Motion

Complete TN Class 9 Science Chapter 2 Motion exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 3

Fluids

Complete TN Class 9 Science Chapter 3 Fluids exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 4

Electric Charge and Electric Current

Complete TN Class 9 Science Chapter 4 Electric Charge and Electric Current exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 5

Magnetism and Electromagnetism

Complete TN Class 9 Science Chapter 5 Magnetism and Electromagnetism exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 8

Sound

Complete TN Class 9 Science Chapter 5 Sound exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 6

Light

Complete TN Class 9 Science Chapter 6 Light exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 7

Heat

Complete TN Class 9 Science Chapter 7 Heat exercise solutions — MCQs, True/False, Fill in the Blanks, Match the Following, Short Answers, Detailed Answers, Numericals, and Exam Tips.

12 June 2026

Ch 14

Acids, Bases and Salts

Complete TN Class 9 Science Chapter 14 Acids, Bases and Salts exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 4

Animal Kingdom

Complete TN Class 9 Science Animal Kingdom exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, phyla, chordate classes, and exam tips.

13 June 2026

Ch 16

Applied Chemistry

Complete TN Class 9 Science Applied Chemistry exercise solutions — metals and non-metals, metallurgy, corrosion and prevention, alloys, chemical industry, fertilizers, cement, glass, and ceramics with MCQs, balanced equations, and exam tips.

13 June 2026

Ch 1

Carbon and Its Compounds

Complete TN Class 9 Science Carbon and Its Compounds exercise solutions — covalent bonding, allotropes, hydrocarbons, homologous series, nomenclature, soaps and detergents, ethanol, ethanoic acid with MCQs, balanced equations, and exam tips.

13 June 2026

Ch 23

Economic Biology

Complete TN Class 9 Science Economic Biology exercise solutions — crop improvement, animal husbandry, poultry farming, sericulture, aquaculture, beekeeping, sustainable agriculture with MCQs, short answers, and detailed answers.

13 June 2026

Ch 25

LibreOffice Impress

Complete TN Class 9 Science LibreOffice Impress exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers with practical steps, menu paths, and keyboard shortcuts.

13 June 2026

Ch 20

Organ Systems in Animals

Complete TN Class 9 Science Organ Systems in Animals exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, digestive, respiratory, circulatory, excretory, nervous systems, and exam tips.

13 June 2026

Ch 18

Organization of Tissues

Complete TN Class 9 Science Organization of Tissues exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, plant tissues, animal tissues, and exam tips.

13 June 2026

Ch 22

World of Microbes

Complete TN Class 9 Science World of Microbes exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers covering bacteria, viruses, fungi, protozoa, useful and harmful microorganisms, and food preservation.

13 June 2026

Ch 5

Atomic Structure

Complete TN Class 9 Science Atomic Structure exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 13

Chemical Bonding

Samacheer Kalvi 9th Science Chemical Bonding exercise solutions with MCQs, fill in blanks, true or false, match the following, short and detailed answers, common mistakes, and exam checklist.

12 June 2026

Ch 24

Environmental Science

Complete TN Class 9 Science Environmental Science exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 5

Nutrition and Health

Complete TN Class 9 Science Nutrition and Health exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 12

Periodic Classification of Elements

Complete TN Class 9 Science Periodic Classification of Elements exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 19

Plant Physiology

Complete TN Class 9 Science Plant Physiology exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Ch 9

Universe

Complete TN Class 9 Science Universe exercise solutions — MCQs, Fill in the Blanks, True or False, Match the Following, Short Answers, Detailed Answers, and Exam Tips.

12 June 2026

Practice Resources

revision-plan

Tamil Nadu Class 9 Science 30-Day Revision Plan — Samacheer Kalvi

Day-by-day 30-day revision schedule for Samacheer Kalvi Class 9 Science covering all Physics, Chemistry, and Biology chapters with exam strategy.

11 May 2026

unit-test

Tamil Nadu Class 9 Science Biology Unit Test — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Biology unit test covering Nutrition, Plant Kingdom, Animal Kingdom, and the Nervous System.

11 May 2026

unit-test

Tamil Nadu Class 9 Science Chemistry Unit Test — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Chemistry unit test covering Matter, Atomic Structure, Solutions, Chemical Changes, Carbon Compounds, and Periodic Table.

11 May 2026

model-paper

Tamil Nadu Class 9 Science Model Paper 1 — Samacheer Kalvi

Class 9 Science model paper 1 for Tamil Nadu State Board students following TN board pattern with 1-mark, 3-mark, and 5-mark sections.

11 May 2026

model-paper

Tamil Nadu Class 9 Science Model Paper 2 — Samacheer Kalvi

Class 9 Science model paper 2 for Tamil Nadu State Board students following TN board pattern with 1-mark, 3-mark, and 5-mark sections.

11 May 2026

unit-test

Tamil Nadu Class 9 Science Physics Unit Test — Samacheer Kalvi

Samacheer Kalvi Class 9 Science Physics unit test covering Measurement, Motion, Fluids, Acoustics, and Electricity chapters.

11 May 2026

question-bank

Tamil Nadu Class 9 Science Question Bank — Samacheer Kalvi

Comprehensive Samacheer Kalvi Class 9 Science question bank with 1-mark, 3-mark and 5-mark questions from all Physics, Chemistry, and Biology chapters.

11 May 2026

unit-test

Tamil Nadu Class 9 Science Term 1 Unit Test — Samacheer Kalvi

Class 9 Science term 1 unit test for Tamil Nadu State Board students with term-wise chapter checks, short tests, and correction checklist.

10 May 2026

unit-test

Tamil Nadu Class 9 Science Term 2 Unit Test — Samacheer Kalvi

Class 9 Science term 2 unit test for Tamil Nadu State Board students with term-wise chapter checks, short tests, and correction checklist.

10 May 2026

unit-test

Tamil Nadu Class 9 Science Term 3 Unit Test — Samacheer Kalvi

Class 9 Science term 3 unit test for Tamil Nadu State Board students with term-wise chapter checks, short tests, and correction checklist.

10 May 2026