Health and Hygiene

This chapter provides information on health and hygiene. It defines the meaning of health and the factors affecting it. We also understand the importance of a blanced diet, adequate exercise and rest, personal cleanliness, and community hygiene.

This chapter provides an introduction to the various layers of earth such as crust, mantle, and core. We study about the types and uses of rocks, and their weathering. It further explains the composition of soil and agents of soil erosion.