The Blue Planet class 4 Goyal Brothers Prakashana is a science textbook that teaches students about the environment and the planet we live in. Here is a brief overview of the topics covered in the textbook:

Introduction to the Earth
- The Earth as a planet
- Layers of the Earth
- Continents and oceans
- Landforms and water bodies

The Water Cycle
- Evaporation, condensation, and precipitation
- Importance of water for living organisms
- Water conservation

Weather
- Elements of weather
- Types of weather
- Instruments used to measure weather

Rocks and Minerals
- Types of rocks
- Properties of rocks
- Uses of rocks

Soil
- Formation of soil
- Components of soil
- Soil types

Plants and Animals
- Diversity of life on Earth
- Classification of living things
- Adaptations of plants and animals

Environmental Issues
- Pollution
- Conservation of natural resources
- Sustainable living

Conclusion
- Recap of key concepts
- Appreciation for the Earth and its resources

Overall, The Blue Planet class 4 Goyal Brothers Prakashana is a comprehensive science textbook that aims to instill an appreciation for the environment and the need for sustainable living. By teaching students about the Earth, its natural resources, and the impact of human activities, the textbook encourages students to become responsible and environmentally conscious citizens.