Main Subjects Covered in the Science Textbook for CBSE Class 4:

The Science textbook for CBSE Class 4 covers a wide range of topics that introduce students to various scientific concepts and principles. The subjects covered in the textbook include:

1. Our Environment:
- Components of the environment, such as air, water, and soil
- Pollution and its types (air, water, and noise pollution)
- Conservation of natural resources
- Plant and animal life and their habitats
- Food chains and webs

2. Food and Nutrition:
- Different types of food and their sources
- Balanced diet and its importance
- Nutrients and their functions (carbohydrates, proteins, fats, vitamins, and minerals)
- Food groups and their benefits
- Digestive system and the process of digestion

3. Animals:
- Classification of animals (domestic and wild animals, vertebrates and invertebrates)
- Habitats of different animals
- Life cycles of animals (metamorphosis, egg-laying, and live birth)
- Animal adaptations and their survival strategies
- Importance of wildlife conservation

4. Plants:
- Parts of a plant and their functions
- Types of plants (herbs, shrubs, trees)
- Plant life cycles (germination, growth, flowering, and seed formation)
- Photosynthesis and its significance
- Plant adaptations to different environments

5. Human Body:
- Parts of the human body and their functions (skeletal system, muscular system, respiratory system, circulatory system, and digestive system)
- Senses and their importance (sight, hearing, taste, touch, and smell)
- Personal hygiene and its significance
- Common diseases and their prevention

6. Earth and Universe:
- Earth's rotation and revolution
- Seasons and their causes
- The solar system and its components (planets, moons, and stars)
- Constellations and their significance
- Exploration of space and space missions

7. Natural Phenomena:
- Weather and climate
- Water cycle and its stages (evaporation, condensation, precipitation)
- Rainbows and their formation
- Earthquakes and their causes
- Natural disasters and their impact

8. Matter and Materials:
- States of matter (solid, liquid, gas)
- Properties of matter (mass, volume, density, and solubility)
- Changes in matter (physical and chemical changes)
- Materials and their uses
- Recycling and waste management

These subjects provide a comprehensive understanding of the world around us and lay the foundation for further scientific knowledge and exploration. The textbook includes engaging visuals, diagrams, activities, and experiments to enhance the learning experience of students.