Materials

In this chapter, we will learn about the wool, rearing of sheep and processing of fibre into wool in detail. We will also learn the characteristics and types of silk and sericulture. Besides, it discusses health hazards in the silk and wool industry.

This chapter describes a chemical substance and its classification. It explains the chemical symbols of the elements along with its atomicity, chemical equation and reaction. We will also study chemical changes with the help of examples.

This chapter focuses on acids, bases and salts with their properties and uses. It discusses the natural and synthetic indicators with their examples. It also explains the neutralisation reaction in everyday life and briefs about chemical reactions.

This chapter focuses on the concept of heat. It describes the temperature and the instruments used for its measurements. Further, it explains the transfer of heat with its application and examples.