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NCERT Solutions for Class 7 Science Chapter 3:Fiber to Fabric
In this chapter, students learn about the various types of fibres, i.e., natural and synthetic fibres, understand in detail what selective breeding is, animals that produce wool, silk history, processing of silk, and processing of fibres into wool. Class 7 NCERT of Science bears new concepts in every chapter. The following are the details in brief one gathers from the chapter:
- Selective breeding is the process of selecting the parents for obtaining special characteristics in their offspring, such as soft under hair in sheep.
- The hairs of camel, llama, and alpaca are also processed to yield wool.
- In India, mostly sheep are reared for getting wool. Sheep hair is sheared off from the body, scoured, sorted, dried, dyed, spun and woven, to yield wool.
- Silk fibres are made of a protein. During the life cycle of a silkworm, which feeds on mulberry leaves, it spins cocoons of silk fibres.
- Silk fibres from cocoons are separated out and reeled into silk threads. Weavers weave silk threads into silk cloth.
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