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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

23

Published Guides

60

Chapter Guides

23/23

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

23 Science chapters arranged by unit for Class 8.

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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

23 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 8 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 8 Science: physics, chemistry, biology, and computer applications from the current SCERT book.
  • Covers 23 units from Measurement to Libre Office CALC.
  • Includes definitions, diagrams, activities, exercise answers, 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

23/23 chapter guides published

Unit 1 · Physics · Chapter 1

Measurement

Live
Open guide

Unit 2 · Physics · Chapter 2

Force and Pressure

Live
Open guide

Unit 3 · Physics · Chapter 3

Light

Live
Open guide

Unit 4 · Physics · Chapter 4

Heat

Live
Open guide

Unit 5 · Physics · Chapter 5

Electricity

Live
Open guide

Unit 6 · Physics · Chapter 6

Sound

Live
Open guide

Unit 7 · Physics · Chapter 7

Magnetism

Live
Open guide

Unit 8 · Physics · Chapter 8

Universe and Space

Live
Open guide

Unit 9 · Chemistry · Chapter 9

Matter Around Us

Live
Open guide

Unit 10 · Chemistry · Chapter 10

Changes Around Us

Live
Open guide

Unit 11 · Chemistry · Chapter 11

Air

Live
Open guide

Unit 12 · Chemistry · Chapter 12

Atomic Structure

Live
Open guide

Unit 13 · Chemistry · Chapter 13

Water

Live
Open guide

Unit 14 · Chemistry · Chapter 14

Acids and Bases

Live
Open guide

Unit 15 · Chemistry · Chapter 15

Chemistry in Every Day Life

Live
Open guide

Unit 16 · Biology · Chapter 16

Microorganisms

Live
Open guide

Unit 17 · Biology · Chapter 17

Plant Kingdom

Live
Open guide

Unit 18 · Biology · Chapter 18

Organisation of Life

Live
Open guide

Unit 19 · Biology · Chapter 19

Movements in Animals

Live
Open guide

Unit 20 · Biology · Chapter 20

Reaching the Age of Adolescence

Live
Open guide

Unit 21 · Biology · Chapter 21

Crop Production and Management

Live
Open guide

Unit 22 · Biology · Chapter 22

Conservation of Plants and Animals

Live
Open guide

Unit 23 · Computer Science · Chapter 23

Libre Office CALC

Live
Open guide

Question Bank

  • Definitions, units, and examples
  • Activity observations and labelled diagrams
  • Formula and reason questions
  • Difference-between questions
  • Computer and visual communication 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 8 Science: Atomic Structure

Samacheer Kalvi Class 8 Science Atomic Structure guide covering atoms, subatomic particles, Bohr model, and electronic configuration with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Electricity

Samacheer Kalvi Class 8 Science Electricity guide covering current, voltage, resistance, Ohm's law, circuits, and heating effect with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Force and Pressure

Samacheer Kalvi Class 8 Science Force and Pressure guide covering types of force, pressure, atmospheric pressure, and Archimedes' principle with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Heat

Samacheer Kalvi Class 8 Science Heat guide covering heat vs temperature, thermal expansion, specific heat capacity, and modes of heat transfer with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Light

Samacheer Kalvi Class 8 Science Light guide covering reflection, refraction, laws of reflection, mirrors and lenses with important questions and revision checklist.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Matter Around Us

Samacheer Kalvi Class 8 Science Matter Around Us guide covering states of matter, properties, changes of state, and particle model with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Microorganisms

Samacheer Kalvi Class 8 Science Microorganisms guide covering bacteria, viruses, fungi, useful and harmful microorganisms with important questions.

11 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Acids and Bases

Samacheer Kalvi Class 8 Science Acids and Bases guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Air

Samacheer Kalvi Class 8 Science Air guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Changes Around Us

Samacheer Kalvi Class 8 Science Changes Around Us guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Chemistry in Every Day Life

Samacheer Kalvi Class 8 Science Chemistry in Every Day Life guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Conservation of Plants and Animals

Samacheer Kalvi Class 8 Science Conservation of Plants and Animals guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Crop Production and Management

Samacheer Kalvi Class 8 Science Crop Production and Management guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Libre Office CALC

Samacheer Kalvi Class 8 Science Libre Office CALC guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Magnetism

Samacheer Kalvi Class 8 Science Magnetism guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Measurement

Samacheer Kalvi Class 8 Science Measurement guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Movements in Animals

Samacheer Kalvi Class 8 Science Movements in Animals guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Organisation of Life

Samacheer Kalvi Class 8 Science Organisation of Life guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Plant Kingdom

Samacheer Kalvi Class 8 Science Plant Kingdom guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Reaching the Age of Adolescence

Samacheer Kalvi Class 8 Science Reaching the Age of Adolescence guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Sound

Samacheer Kalvi Class 8 Science Sound guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Universe and Space

Samacheer Kalvi Class 8 Science Universe and Space guide with summary, textbook workflow, important questions, practice tasks, common mistakes, and revision checklist.

10 May 2026

chapter-guide

Tamil Nadu Class 8 Science: Water

Samacheer Kalvi Class 8 Science Water 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 21

Acids and Bases

Samacheer Kalvi 8th Science Acids and Bases 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 12

Air

Samacheer Kalvi 8th Science Air 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 5

Atomic Structure

Samacheer Kalvi 8th Science Atomic Structure 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 5

Changes Around Us

Samacheer Kalvi 8th Science Changes Around Us 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 15

Chemistry in Every Day Life

Samacheer Kalvi 8th Science Chemistry in Everyday Life 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

Conservation of Plants and Animals

Samacheer Kalvi 8th Science Conservation of Plants and Animals 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 23

Crop Production and Management

Samacheer Kalvi 8th Science Chapter 7 Crop Production and Management 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 2

Electricity

Samacheer Kalvi 8th Science Electricity 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 2

Force and Pressure

Samacheer Kalvi 8th Science Chapter 2 Force and Pressure 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 3

Heat

Detailed Samacheer Kalvi 8th Science Heat exercise solutions — MCQs, true/false, fill-in-blanks, match, short & detailed answers with common mistakes and exam checklist.

12 June 2026

Ch 23

Libre Office CALC

Samacheer Kalvi 8th Science LibreOffice Calc 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 1

Light

Samacheer Kalvi 8th Science Chapter 3 Light 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 18

Magnetism

Samacheer Kalvi 8th Science Magnetism 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 4

Matter Around Us

Samacheer Kalvi 8th Science Chapter 4 Matter Around Us 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 1

Measurement

Samacheer Kalvi 8th Science Chapter 1 Measurement 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 3

Microorganisms

Samacheer Kalvi 8th Science Chapter 6 Microorganisms 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 19

Movements in Animals

Samacheer Kalvi 8th Science Chapter 5 Movements in Animals 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 8

Organisation of Life

Samacheer Kalvi 8th Science Chapter 8 Organisation of Life 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 7

Plant Kingdom

Samacheer Kalvi 8th Science Plant Kingdom 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 15

Reaching the Age of Adolescence

Samacheer Kalvi 8th Science Reaching the Age of Adolescence 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 17

Sound

Samacheer Kalvi 8th Science Sound 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 8

Universe and Space

Samacheer Kalvi 8th Science Universe and Space 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 20

Water

Samacheer Kalvi 8th Science Water 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

Practice Resources

revision-plan

Tamil Nadu Class 8 Science 30-Day Revision Plan — Samacheer Kalvi

Day-by-day 30-day revision plan for Class 8 Science Tamil Nadu State Board covering all chapters across three terms.

11 May 2026

unit-test

Tamil Nadu Class 8 Science Biology Unit Test — Samacheer Kalvi

Class 8 Science Biology unit test for Tamil Nadu State Board covering Life Processes of Plants and Animals, Microorganisms, Reproduction, and Health and Hygiene.

11 May 2026

unit-test

Tamil Nadu Class 8 Science Chemistry Unit Test — Samacheer Kalvi

Class 8 Science Chemistry unit test for Tamil Nadu State Board covering Matter, Atomic Structure, Periodic Classification, Acids/Bases/Salts, and Carbon.

11 May 2026

model-paper

Tamil Nadu Class 8 Science Model Paper 1 — Samacheer Kalvi

Class 8 Science model paper 1 for Tamil Nadu State Board with section A, B, C questions in TN board pattern covering all terms.

11 May 2026

model-paper

Tamil Nadu Class 8 Science Model Paper 2 — Samacheer Kalvi

Class 8 Science model paper 2 for Tamil Nadu State Board with section A, B, C questions in TN board pattern covering all terms.

11 May 2026

unit-test

Tamil Nadu Class 8 Science Physics Unit Test — Samacheer Kalvi

Class 8 Science Physics unit test for Tamil Nadu State Board covering Measurements, Force and Pressure, Heat, Light, and Electricity.

11 May 2026

question-bank

Tamil Nadu Class 8 Science Question Bank — Samacheer Kalvi

Class 8 Science question bank for Tamil Nadu State Board with important 1-mark, 3-mark, and 5-mark questions across all chapters and terms.

11 May 2026

unit-test

Tamil Nadu Class 8 Science Term 1 Unit Test — Samacheer Kalvi

Class 8 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 8 Science Term 2 Unit Test — Samacheer Kalvi

Class 8 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 8 Science Term 3 Unit Test — Samacheer Kalvi

Class 8 Science term 3 unit test for Tamil Nadu State Board students with term-wise chapter checks, short tests, and correction checklist.

10 May 2026