NCERT Solutions for Class 8 Science Chapter 3: Synthetic Fibres and Plastic

In this chapter, we will learn about man-made or synthetic fibres. We will discuss different types of synthetic fibres and their properties, their usage and their characteristics. The chapter gives special emphasis on plastics. We would read about the usage of plastics and their feasibility in everyday life use. We would also discuss the effects that plastic has on the environment. The chapter concludes by explaining how to curb the harmful effects of plastics and the 5 R’s principle.

• Man-made fibres are called synthetic fibres.
• The formation of synthetic fibre is made up of small units.
• These units combined to form polymers.
• There are different types of synthetic fibres, namely rayon, nylon, polyester, acrylic, etc.
• All these fibres have different properties, textures, and different chemical formations.
• They are also used for different purposes, as specified in the chapter.
• The chapter also discusses the characteristics of synthetic fibres and their respective costs.
• Plastics are also polymers.
• There are different types of plastics according to their arrangements.
• We also learn about thermoplastics and thermosetting plastics in this chapter.
• Plastics' durable and flexible nature makes it a very attractive material for the production of various products.
• The chapter goes on to illustrate the various characteristics of plastic.
• The chapter concludes by telling us about the environmental concerns associated with plastics.
• Plastics are non-biodegradable, which makes their disposal very difficult.
• We also learn about the 5 R’s principle – reduce, reuse, recycle, recover and refuse.