The NCERT Solution For Class 8 Science, Chapter 3 deals with Synthetic Fibres and Plastics. In this chapter, you will learn about fabrics and how they are made. You will learn about different types of fibres: man-made fibres and natural fibres. Besides, you will also learn more about the different materials and the fabric used in the preparation of these items. You will understand more about the types of materials used and also the reasons for using specific material for a particular item. In this chapter, you will also learn about plastic and the reason for plastic being the most useful material in making items out of it. You will also study the demerits of using plastic with regard to its damage to the environment.
The Reshmi reel threads strips are rubbed by pressing the fibres into narrow circles, imitating the palms in making lights.
In this way, the pooni is ready for spinning.
The broken fibres come out in this process.
This type of yarn is called woollen yarn and the cloth which is made from it is called woollen cloth.
In 'worsted cloth', the wool fibres are parallel to each other and therefore such a cloth is made from very long fibres.