Natural Resources

The chapter discusses water, the main component of earth. It explains in detail about the importance of water, uses of water, different sources of water, and water cycle.

This chapter basically describes the air. The composition of the air and various layers of the atmosphere is well described here. This chapter contains activities for the students, which will improve their conceptual knowledge.

This chapter describes various types of wastes. The biodegradable and non-biodegradable wastes are discussed here. The chapter also gives a brief idea on vermicomposting.