Download official Tamil Nadu 4th standard Science study materials, guides, and term-wise notes (2026-27) across all three terms: Term 1 (First Term), Term 2 (Second Term), and Term 3 (Third Term) under the Samacheer Kalvi curriculum. If you need the official state textbooks, access the Science Textbooks PDF portal or the complete 4th Standard Textbooks PDF repository. These are useful for students and teachers seeking the latest state-prescribed curriculum.
Alongside state textbooks, download complete concept summaries, scientific experiment guides, organ system diagrams, and book-back question banks below. These are useful for students and teachers preparing for school Formative Assessments (FA) and Summative Assessments (SA / Term Exams), as well as educators preparing for Teacher Posts (TRB SGT), Teacher Eligibility Tests (TNTET Paper 1), and TNPSC exams where general science fundamentals form a substantial portion. If you are exploring other grades, access our resources for Class 1, Class 2, Class 3, Class 5, as well as Class 6, Class 7, Class 8, Class 9, Class 10 (SSLC), Class 11 (Plus One), and Class 12 (Plus Two).
4th Science Term 1 Study Materials (முதல் பருவம்)
Download official 4th Standard Science Term 1 study notes, internal organ illustrations, and book-back question banks across My Body, Matter and Materials, Work and Energy, and Everyday Science:
| பாடப் பொருள் / Material Title | வகை / Medium | பதிவிறக்கம் / Link |
|---|---|---|
| 4th Science Term 1 Complete Study Guide (TM & EM)
My Body Organs & Work/Energy Complete Notes
|
Both Mediums | Download PDF |
| 4th Science Term 1 Book-Back Questions & Answers
Chapter 1 to 4 Complete Solved Q&A
|
Both Mediums | Download PDF |
| 4th Science Term 1 Internal Organs (Brain, Heart, Lungs, Kidneys) Notes
Organ Functions & Personal Hygiene Rules
|
Both Mediums | Download PDF |
| 4th Science Term 1 Quarterly Exam Model Question Paper
District Common Exam Board | Term 1 Model Question Paper with Keys
|
Both Mediums | Download PDF |
| 4th Science Term 1 Simple Machines & Energy Worksheets
Lever, Pulley, Inclined Plane & Everyday Science Activities
|
Both Mediums | Download PDF |
4th Science Term 2 Study Materials (இரண்டாம் பருவம்)
Access 4th Standard Science Term 2 study guides, root system diagrams, and water conservation worksheets:
| பாடப் பொருள் / Material Title | வகை / Medium | பதிவிறக்கம் / Link |
|---|---|---|
| 4th Science Term 2 Complete Study Guide
Food, Water & Plants Detailed Notes
|
Both Mediums | Download PDF |
| 4th Science Term 2 Plant Parts & Root Types (Tap Root & Fibrous Root)
Stem, Leaf & Photosynthesis Illustrated Notes
|
Both Mediums | Download PDF |
| 4th Science Term 2 Book-Back Exercise Solutions
Solved Fill-in-the-Blanks & Short Answers
|
Both Mediums | Download PDF |
| 4th Science Term 2 Half-Yearly (SA) Model Question Paper
District Common Exam Board | Second Term Common Examination Paper
|
Both Mediums | Download PDF |
| 4th Science Term 2 Water Purification & Food Hygiene Worksheets
Samacheer Assessment Wing | Formative Evaluation Monthly Tests
|
Both Mediums | Download PDF |
4th Science Term 3 Study Materials (மூன்றாம் பருவம்)
Download 4th Standard Science Term 3 revision packs, animal habitats guides, and annual Summative Assessment model papers for complete preparation:
| பாடப் பொருள் / Material Title | வகை / Medium | பதிவிறக்கம் / Link |
|---|---|---|
| 4th Science Term 3 Complete Study Guide
Green Environment, Animals & Air Notes
|
Both Mediums | Download PDF |
| 4th Science Term 3 Book-Back Exercise Solutions
Solved Environmental Science Exercises
|
Both Mediums | Download PDF |
| 4th Science Term 3 3Rs Waste Management & Animal Classification
Herbivores, Carnivores, Omnivores & Biodegradable Waste
|
Both Mediums | Download PDF |
| 4th Science Annual Summative Assessment (SA) Model Paper
District Common Exam Board | Full Year Summative Assessment Model Paper
|
Both Mediums | Download PDF |
| 4th Science Term 3 One-Mark Question Bank with Answers
Objectives, True/False & Match the Following
|
Both Mediums | Download PDF |
4th Science Samacheer Kalvi Syllabus & Units
The Tamil Nadu 4th standard Science curriculum introduces basic human biology, physical science mechanisms, and environmental cleanliness across three terms:
Term 1 (முதல் பருவம்)
- Unit 1 (My Body): Internal organs (brain, heart, lungs, stomach, kidneys) & hygiene.
- Unit 2 (Matter & Materials): Transparent, translucent and opaque objects; natural/synthetic fibers.
- Unit 3 (Work and Energy): Simple machines (lever, pulley, inclined plane, wedge) & types of energy.
- Unit 4 (Science in Everyday Life): Kitchen science, food preservation and safety.
Term 2 (இரண்டாம் பருவம்)
- Unit 1 (Food): Raw vs cooked food, cooking methods and balanced diet foundations.
- Unit 2 (Water): Water purification methods, potable water and water conservation.
- Unit 3 (Plants): Plant anatomy, tap root vs fibrous root, stem functions & leaf parts.
Term 3 (மூன்றாம் பருவம்)
- Unit 1 (Green Environment): Biodegradable vs non-biodegradable waste & 3Rs (Reduce, Reuse, Recycle).
- Unit 2 (Animals): Herbivores, carnivores, omnivores & animal care.
- Unit 3 (Air): Atmosphere, properties of air, breathing mechanisms and wind energy.
⭐ Essential 4th Science Body Organs & Machine Types
In Formative Assessment FA(a) practicals and Summative Assessments, diagram-drawing and organ function explanations carry 10 to 15 marks. Students should practice:
Study & Teaching Tips for Parents & Teachers
Make primary science engaging and easy to understand through simple demonstrations:
- Internal Organs Placement: Have children touch their chest (left side for heart, both sides for lungs) while explaining organ functions.
- Explore Simple Machines at Home: Identify ramps, scissors, wheels, and bottle openers as simple machines that reduce human effort.
- Sprouting & Root Observation: Sprout green gram (moong) or mustard seeds in a transparent cup to observe root growth directly.
🎒 Tamil Nadu Primary School Resources (வகுப்பு 1–5 தொடக்கப் பள்ளி வழிகாட்டிகள் & பாடப்புத்தகங்கள்):
📚 Class 4 Other Subject Study Materials (4ஆம் வகுப்பு பிற பாடங்கள்):