Tamil Nadu Board of Secondary Education Class 4 Science Syllabus - Free PDF Download
Tamil Nadu Board of Secondary Education Syllabus 2025-26 Class 4: The Tamil Nadu Board of Secondary Education Class 4 Science Syllabus for the examination year 2025-26 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 2025-26 Tamil Nadu Board of Secondary Education Class 4 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 4 Science Syllabus for 2025-26 is below.
Academic year:
Tamil Nadu Board of Secondary Education Class 4 Science Revised Syllabus
Tamil Nadu Board of Secondary Education Class 4 Science and their Unit wise marks distribution
Tamil Nadu Board of Secondary Education Class 4 Science Course Structure 2025-26 With Marking Scheme
| # | Unit/Topic | Weightage |
|---|---|---|
| 1 | Term - 1 | |
| 1.1 | My Body | |
| 1.2 | Matter and Materials | |
| 1.3 | Work and Energy | |
| 1.4 | Science in Everyday Life | |
| 2 | Term - 2 | |
| 2.1 | Food | |
| 2.2 | Water | |
| 2.3 | Plants | |
| 3 | Term - 3 | |
| 3.1 | Green Environment | |
| 3.2 | Life of Animals | |
| 3.3 | Air We Breathe | |
| Total | - |
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Syllabus
1: Term - 1
Tamil Nadu Board of Secondary Education Class 4 Science Syllabus
1.1 My Body
- Human Organ System
- The Human Brain - Forebrain
Forebrain:
- Olfactory lobes
- Cerebrum
- Diencephalon
- Lungs
- The Stomach
- Introduction
- Function of the Stomach
- Human Heart
- Structure of the Heart
- Layers of the Heart Wall
- Chambers of the Heart
- Valves of the Heart
- Pathway of Blood through the Heart
- Kidney and Its Internal Structure
- Kidneys
- Internal Structure of the kidney
- Bone and Its Types
- Bones
- Types of Bones
- Muscles and Its Types
- Introduction
- Types of Muscles
- Activity
- The Teeth and Its Structure
- Teeth and Its Types
- Structure of a Tooth
- Oral Health
- Good Touch, Bad Touch and Don’t Touch
1.2 Matter and Materials
- Various uses of changes in physical state
- Properties of substances
- Activity 1
- Activity 2
- Activity 3
- Activity 4
- Activity 5
- Activity 6
- Activity 7
- Metals
- Important Terms Related to Light
- Sources of Light
- Reflection of Light
- Introduction
- Activity
- Experiment
1.3 Work and Energy
- Concept of Work
- Work
- Work Done at Different Angles and Its Characteristics
- Unit of Work
- Energy
- Introduction to Energy
- Commercial Unit of Energy
- Mechanical Energy
- Introduction
- Experiment
- Forms of Energy
- Electrical Energy
- Introduction
- Applications of Electrical Energy
- Storage of Electrical Energy
- Energy Resources > Conventional energy resources or non-renewable energy resources
- Simple Machines
- A Pulley
- Introduction
- Experiment
- An Inclined Plane
- Introduction
- Experiment
- Archimedes' Screw
- A Wedge
- Screw
- A Wheel and Axle
- A Lever
- Introduction
- Experiment 1
- Experiment 2
- Experiment 3
- Types of Levers
1.4 Science in Everyday Life
- Milk
- Food and Its Types
- Cooking and Different Method of Cooking
- Baking of Bread, Biscuit and Cake
- Gadgets
2: Term - 2
Tamil Nadu Board of Secondary Education Class 4 Science Syllabus
2.1 Food
- Food and Its Types
- Cooking and Different Method of Cooking
- Cooking Habit
- Cooking Utensils
- Meal-time Hygiene
- Food During Illness
- Food Wastage
- Introduction
- Quantitative wastage of food
- Qualitative wastage of food
- Effective Ways to Prevent Food Wastage and Spoilage
- Food and Micro-organisms
- Methods of Food Preservation
- Methods of Food Preservation
- Methods of Food Protection
2.2 Water
- Water: Our Lifeline
- Introduction
- Importance of Water for Sustaining Life
- States of Matter
- The Solid State
- The Solid State of Matter
- Characteristics of Solids
- The Solid State
- Change in State of Water
- Biogeochemical Cycles (Nutrient Cycles)
- Water Management (Conservation of Water)
2.3 Plants
- Plant Forms and Functions
- The Structure of a Plant
- Photosynthesis: Food-Making Process in Plants
- Process of Photosynthesis
- Classification of Plants
- Introduction
- Classification Based on Size and Shape
- Classification Based on Support (Vines)
- Classification Based on Lifespan
- Classification Based on Habitat (Where Plants Grow)
- Seasonal Flowers
- Exotic Plants
- Plants as Food
3: Term - 3
Tamil Nadu Board of Secondary Education Class 4 Science Syllabus
3.1 Green Environment
- Five R’s of Waste Management
- Environmental Conservation
- Need of environmental conservation
- Environmental Conservation. Our social responsibility
- Waste Separation Exercise
- Plastics in Tamil Nadu
- Environment Friendly Materials
- Litter Free Environment
3.2 Life of Animals
- Group Behaviour in Animals
- Structure of Insects
- Adaptation in Animals
- Animals Active at Night
3.3 Air We Breathe
- Air Around Us
- Importance of Air
- Air is a Mixture
- Importance of Nitrogen
- Composition and Components of Air
- Introduction
- Uses of Gases in Air
- Importance of Oxygen
- Importance of Carbon Dioxide
