Tamil Nadu Board of Secondary Education Class 6 Science Syllabus - Free PDF Download
Tamil Nadu Board of Secondary Education Syllabus 2026-27 Class 6: The Tamil Nadu Board of Secondary Education Class 6 Science Syllabus for the examination year 2026-27 has been released by the Tamil Nadu Board, Tamil Nadu Board of Secondary Education. The board will hold the final examination at the end of the year following the annual assessment scheme, which has led to the release of the syllabus. The 2026-27 Tamil Nadu Board of Secondary Education Class 6 Science Board Exam will entirely be based on the most recent syllabus. Therefore, students must thoroughly understand the new Tamil Nadu Board of Secondary Education syllabus to prepare for their annual exam properly.
The detailed Tamil Nadu Board of Secondary Education Class 6 Science Syllabus for 2026-27 is below.
Academic year:
Tamil Nadu Board of Secondary Education Class 6 Science Revised Syllabus
Tamil Nadu Board of Secondary Education Class 6 Science Course Structure 2026-27 With Marking Scheme
| # | Unit/Topic | Weightage |
|---|---|---|
| 1 | Term - 1 | |
| 1.1 | Measurements | |
| 1.2 | Force and Motion | |
| 1.3 | Matter Around Us | |
| 1.4 | The World of Plants | |
| 1.5 | The World of Animals | |
| 1.6 | Health and Hygiene | |
| 1.7 | Computer - An Introduction | |
| 2 | Term - 2 | |
| 2.1 | Heat | |
| 2.2 | Electricity | |
| 2.3 | Changes Around Us | |
| 2.4 | Air | |
| 2.5 | The Cell | |
| 2.6 | Human Organ Systems | |
| 2.7 | Parts of Computer | |
| 3 | Term - 3 | |
| 3.1 | Magnetism | |
| 3.2 | Water | |
| 3.3 | Chemistry in Everyday Life | |
| 3.4 | Our Environment | |
| 3.5 | Plants in Daily Life | |
| 3.6 | Hardware and Software | |
| Total | - |
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Syllabus
1: Term - 1
Tamil Nadu Board of Secondary Education Class 6 Science Syllabus
1.1 Measurements
- Measurements
- Measurement
- The need for measurement in daily life
- Measurement of Length
- Length and Its Measurement
- The Parallax Method
- Activity: Understanding Parallax Through Experience
- Measuring Stellar Distances
- Measuring the Size od Celestial Objects
- Measuring Very Small Distances
- Special Units for Large Distances
- Example
- Properties of Matter and Their Measurement
- The International System of Units (SI)
- Base Physical Quantities and their Units,
- Definitions of SI Base Units,
- Prefixes used in the SI System
- The International System of Units (SI)
- Unit Prefixes
- Devices for Measuring Length
- Use of a metre ruler to measure length
- Description of a metre ruler
- Measurement of length of an object with a metre ruler
- Parallax Error
- Use of measuring tape to measure length
- Description of a measuring tape
- Measuring the Length of a Curved Line
- Measurement of Mass
- Introduction
- The Old Kilogram Standard
- The New Kilogram Standard
- Measuring Atoms & Molecules: Atomic Mass Unit (amu)
- Devices for Measuring Mass
- Measurement of Time
- The Foundation of Time
- The Revolutionary Solution: Cesium Atomic Clocks
- Real World Applications
- Numerical Problem of Measurement
1.2 Force and Motion
- Force and Motion
- Force
- Definition: Force
- Formula: Force
- Key Points: Force
- Force - Push or Pull
- Types of Forces>Contact and Non-Contact Forces
- Introduction
- Definition: Contact Force
- Definition: Non-Contact Force
- Characteristics
- Understanding Contact Forces
- Understanding Non-Contact Forces
- Experiment
- Significance
- Effect of Force
- A Force can change the State of motion
- Force can change the shape of an object
- Stops or tries to stop a moving body
- Changes or tries to change the direction of motion of a moving body
- Like parallel forces effect
- Unbalanced forces effect
- Unlike parallel forces effect
- Types of Motion
- Introduction
- Definition: Linear Motion
- Definition: Non-Linear Motion
- Characteristics
- Linear Motion
- Non-Linear Motion
- Significance
- Multiple Motion
- Speed
- Science Today – Robot
1.3 Matter Around Us
- Matter (Substance)
- Experiment 1
- Experiment 2
- Experiment 3
- Experiment 4
- Substance (Matter)
- Physical Nature of matter
- Chemical properties
- Characteristics of Particles (Molecules) of Matter
- Characteristics of particles or matter
- Classification of Matter and Particle
- Experiment
- States of Matter
- Three States of Matter
- Comparison of Solids, Liquids, and Gases
- The Solid State
- The Solid State of Matter
- Characteristics of Solids
- The Liquid State
- The Liquid State of Matter
- Characteristics of Liquids
- The Gaseous State
- The Gaseous State of Matter
- Characteristics of Gases
- Natural substances
- Pure Substances
- Pure substance
- Characteristics of Pure substance
- Examples of Pure Substance
- Elements
- Experiment
- Elements
- Compound
- Introduction
- Experiment 1
- Experiment 2
- Impure Substance
- Mixture
- Introduction
- Separation of Unwanted Substances from Mixtures
- Activity
- Separation of Mixtures
- Methods of Separation
- Filtration Method
- Sieving Method
- Churning Method
- Threshing Method
- Winnowing Method
- Handpicking Method
- Magnetic Separation Method
- Sedimentation Method
- Decantation Method
- Food Adulteration
1.4 The World of Plants
- Plant Forms and Functions
- Root
- Introduction
- Experiment
- Types of Root
- Types of Root
- Experiment 1
- Experiment 2
- Experiment 3
- Shoot System
- Stem
- The Structure of a Plant
- Modifications of Plant Parts
- Modification of Stems
- Modifications of Leaf
1.5 The World of Animals
1.6 Health and Hygiene
- Hygiene
- Introduction
- The Importance of Hygiene for Health and Well-being
- Component of Food
- Carbohydrates
- Experiment 1
- Experiment 2
- Carbohydrates
- Types of Carbohydrates and their Importance
- Fats (Lipids)
- Experiment
- Fats (Lipids)
- Vitamin and Minerals
- Vitamins
- Minerals
- Carbohydrates
- Component of Food: Minerals
- Macro-minerals
- Trace minerals (micro-minerals)
- A Balanced Diet
- Deficiency Diseases
- Diseases Due to Deficiency of Vitamin
- Diseases Due to Deficiency of Proteins
- Diseases Due to Deficiency of Minerals
- Effective Ways to Maintain Good Health
- Bacteria
- Viruses
1.7 Computer - An Introduction
- Evolution of Computer
- Generations of Computers
- Classification of Computers
- Software
- Introduction to Software
- Need of Software
- Types of Software
2: Term - 2
Tamil Nadu Board of Secondary Education Class 6 Science Syllabus
2.1 Heat
- Heat
- Introduction
- Units of Heat
- Sources of Heat
- Sources of Heat
- Methods of Heat Energy Transfer
- Various Forms of Energy
- Heat Exchange
- Definition: Principle of Heat Exchange
- The Temperature and a Thermometer
- Introduction
- Unit of Temperature
- Experiment: 1
- Experiment: 2
- Temperature and Heat
- Introduction
- Definition: Heat
- Definition: Temperature
- Formula: Average Kinetic Energy and Temperature
- Formula: Heat Exchange
- Characteristics
- How Heat Affects Matter
- Significance
- Real-Life Examples
- Summary
- Flow of Heat
- Thermal Expansion
- Definition: Thermal Expansion
- Classification of Thermal Expansion
- Expansion of Solids
- Introduction
- Linear Expansion
- Areal Expansion
- Volumetric Expansion
- Numerical Problems of Heat
2.2 Electricity
- Electricity
- Sources of Electricity
- Forms of Energy > Geo Thermal Energy
- Definition: Geo Thermal Energy
- Electricity Generation using Hydroelectric Energy
- Key Points: Electricity Generation using Hydroelectric Energy
- Power Plants Based on Nuclear Energy
- Key Points: Power Plants Based on Nuclear Energy
- Electric cell
- Introduction
- Definition: Electric Cell
- Mechanism of Cell
- Types of Electric Cells
- Experiment
- Battery
- Electric Circuit
- Key Points: Electric Circuit
- Types of Circuits: Simple Circuit
- Types of Circuits: Series Circuit
- Types of Circuits: Parallel Circuit
- Symbols and Functions of Various Components of an Electric Circuits
- Components of Electric Circuits
- Experiment
- Electrical Conduction in Solids
- Introduction
- Conductors
- Insulators
- Semiconductors
- Table
- Concept of Electrical Conductivity
- Classification of Semiconductors
- Precautions to Be Taken While Using Electricity
2.3 Changes Around Us
- Changes-Physical and Chemical
- Chemical and Physical Changes
- Experiment
- Classification of Change: Slow and Fast Changes
- Classification of Change: Natural and Man-made Changes
- Classification of Change: Periodic and Non-periodic Changes
- Classification of Change: Desirable and Undesirable Changes
- Classification of Change: Reversible and Irreversible Changes
- Classification of Change: Physical Changes
- Change of State
- Introduction
- Definition: Change of State
- Freezing
- Condensation
- Activity
- Concept of Melting (Fusion)
- Melting (Fusion)
- Melting point
- Latent heat
- Latent heat of fusion
- Heating curve of ice during melting
- Change in volume on melting
- Effect of pressure on the melting point
- Effect of impurities on the melting point
- Concept of Freezing (Solidification)
- Introduction
- Melting and Freezing Point of Water
- Boiling and Condensation Points
- Concept of Desublimation (Deposition)
- Concept of Condensation (Liquefaction)
- Concept of Evaporation
- Factors Affecting Evaporation
- How does Evaporation cause cooling?
- Vaporisation or Boiling
- Definition: Vaporisation
- Definition: Boiling Point
- Example
- Changes in States of Water
- Experiment: Heating Curve for Water
- Sublimation
- Introduction
- Experiment
- Composition of a Solution
- Mass Percentage or Percentage by Mass (w/w) and Volume Percentage or Percentage by Volume (v/v)
- Grams Per Litre (g/L) and Molarity (M)
- Formality (F) and Molality (m)
- Normality (N) and Mole Fraction (χ)
- Parts per Million (ppm)
- Examples
- Chemical Reaction
- Definition: Chemical Change
- Definition: Reactants
- Definition: Products
2.4 Air
- Air Around Us
- Atmosphere and Its Layers
- Atmosphere
- Layers of Atmosphere
- The Role of Atmosphere In Climate Control
- Air is a Mixture
- Composition and Components of Air
- Introduction
- Uses of Gases in Air
- Burning and Combustion
- Concept of Photosynthesis
- Definition: Photosynthesis
- Explanation
- Process of Photosynthesis
- Chemical Equation: Photosynthesis
- Key Points: Process of Photosynthesis
- Importance of Air
2.5 The Cell
- The Invention of the Microscope and the Discovery of Cell
- Prokaryotic and Eukaryotic Cell
- Characteristics of Cells
- Types of Cells
- Difference between Prokaryotic and Eukaryotic cells
- Plant Cell Vs Animal Cell
- Cell Organelles
- Mitochondria - “Power House of the Cell”
- Introduction
- Functions of Mitochondria
- Key Points: Mitochondria
- Mitochondria - “Power House of the Cell”
- Non-living Substances Or Cell Inclusion
- Cell Inclusion
- Granule
- Vacuole
- Functions of Vacuole
- Key Points: Vacuoles & Granules
2.6 Human Organ Systems
- Human Organ System
- The Human Skeletal System
- Introduction
- Parts of the human skeletal system
- The Human Skeleton: Axial Skeleton
- The Human Skeleton: Appendicular Skeleton
- Muscular System
- Muscles and Its Types
- Introduction
- Types of Muscles
- Activity
- Human Digestive System
- Digestion
- Alimentary Canal
- Digestive organs
- Human Respiratory System
- Respiratory System
- Exchange of Gases in Lungs
- Significance of Respiration
- Key Points: Respiratory System
- Parts of Respiration
- Breathing
- Gaseous transport
- Tissue respiration
- Cellular respiration
- Blood Circulatory System
- Circulation of Blood in the Heart (Functioning of Heart)
- Introduction
- Experiment
- Key Points: Circulation of Blood in the Heart
- Blood
- Heart Beat
- Definition: Cardiac Cycle
- Heart Beat Rate
- Heart Beat Sounds
- Key Points: Heart Beat
- Human Nervous System
- Introduction
- Components of Nervous System
- Need of Nervous System
- Key Points: Human Nervous System
- Concept of Sense Organs
- Human Endocrine System
- Definition: Endocrine System
- Human Excretory System
- Introduction
- Human Excretory System Organs
- Excretion in Humans
- Mechanism of Excretion in Humans
- Dialysis
2.7 Parts of Computer
- Architecture of Computer
- Memory Unit (Memory Devices)
- Classification of Computers
- Connecting the Computer
- Connecting to the Internet
- Dial-up Connection
- Broadband Connection
- Wireless Connection
3: Term - 3
Tamil Nadu Board of Secondary Education Class 6 Science Syllabus
3.1 Magnetism
- Magnet
- Discovery of Magnets
- Classification of Magnets
- Classification of Magnets
1) Natural Magnet
2) Artificial Magnet
- Classification of Magnets
- Magnetic and Non-magnetic Materials
- Introduction
- Experiment
- Magnetic Pole
- Finding Directions with a Magnet
- Magnetic Properties of Materials
- Demagnetization of a Magnet
- Care and Storage of Magnets
- Uses of Magnets
- Science Today – Bullet Trains
3.2 Water
- Water: Our Lifeline
- Introduction
- Importance of Water for Sustaining Life
- Where Do We Get Water From?
- Availability of Water
- Composition of Water
- Introduction
- Water Cycle
- Biogeochemical Cycles (Nutrient Cycles)
- Sources of Water
- Water Management (Conservation of Water)
- Waste Water Management
- Scarcity of Water
- Various uses of Water
- Scarcity of Water
- Importance of Water
- Water Distribution and Treatment System
3.3 Chemistry in Everyday Life
- Chemical Reaction
- Definition: Chemical Change
- Definition: Reactants
- Definition: Products
- Applied Chemistry
- Soap
- Introduction
- Types of Soaps
- Synthetic Detergents
- Experiment
- Detergents
- Detergent and Its Working
- Experiment
- Fertilizers
- Introduction of Fertilizers
- Harmful Effects of Chemical Fertilizers
- Protection of crops
- Steps for Storing Grain
- Steps to Protect Grain from Damage
- Cement
- Gypsum
- Epsom
- Important Salts in Daily Life
- Phenol
- Adhesives
3.4 Our Environment
- Our Needs and the Environment
- Classification of Animal
- Introduction
- Diversity in Animal Food
- Reproduction in Animals
- Classification of Animals Based on Habitat
- Energy Pyramid
- Trophic Level
- Pyramid of Energy
- Waste Separation Exercise
- Five R’s of Waste Management
- Pollution
- Definition: Pollution
- Definition: Pollutant
3.5 Plants in Daily Life
- Economic Botany
- Plant Forms and Functions
- Plants as Food
- Spices
- Medicinal Plants
- Fibre Yielding Plants
- Timber Yielding Plants
- Ornamental Plants
- Interrelationship Between Plants and Animals
3.6 Hardware and Software
- Software
- Introduction to Software
- Need of Software
- Types of Software
