TN State Board · Class 9
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
Syllabus and Official Resources
Official-first3 syllabus focus areas with Tamil Nadu textbook resources as the primary source.
View sectionTextbook Exercise Solutions
PlannedChapter-wise MCQ, short answers, long answers, and numericals with worked solutions.
View sectionImportant Questions
Ready5 question patterns are listed for one-mark, short-answer, and long-answer practice.
View sectionExam Tips
Subject-specificExam guidance focuses on science presentation, keywords, time use, and common mistakes.
View sectionFAQs
In guidesFAQs are included inside individual guides so answers stay close to the exact chapter or resource.
View sectionSyllabus 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 SourceChapter Dashboard
25/25 chapter guides published
Unit 1 · Physics · Chapter 1
Measurement
Unit 2 · Physics · Chapter 2
Motion
Unit 3 · Physics · Chapter 3
Fluids
Unit 4 · Physics · Chapter 4
Electric Charge and Electric Current
Unit 5 · Physics · Chapter 5
Magnetism and Electromagnetism
Unit 6 · Physics · Chapter 6
Light
Unit 7 · Physics · Chapter 7
Heat
Unit 8 · Physics · Chapter 8
Sound
Unit 9 · Physics · Chapter 9
Universe
Unit 10 · Chemistry · Chapter 10
Matter Around Us
Unit 11 · Chemistry · Chapter 11
Atomic Structure
Unit 12 · Chemistry · Chapter 12
Periodic Classification of Elements
Unit 13 · Chemistry · Chapter 13
Chemical Bonding
Unit 14 · Chemistry · Chapter 14
Acids, Bases and Salts
Unit 15 · Chemistry · Chapter 15
Carbon and its Compounds
Unit 16 · Chemistry · Chapter 16
Applied Chemistry
Unit 17 · Biology · Chapter 17
Animal Kingdom
Unit 18 · Biology · Chapter 18
Organization of Tissues
Unit 19 · Biology · Chapter 19
Plant Physiology
Unit 20 · Biology · Chapter 20
Organ Systems in Animals
Unit 21 · Biology · Chapter 21
Nutrition and Health
Unit 22 · Biology · Chapter 22
World of Microbes
Unit 23 · Biology · Chapter 23
Economic Biology
Unit 24 · Environmental Science · Chapter 24
Environmental Science
Unit 25 · Computer Science · Chapter 25
LibreOffice Impress
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
