NCERT Solutions Class 8 Science Chapter 3 - Synthetic Fibres and Plastic- From ancient times, humans are using fabrics for wearing and for other purposes also. The smallest unit of fabric is called fibre. These fibres may come from natural sources like cotton, jute etc or may be invented in laboratories by using chemical reagents. NCERT Science Class 8 chapter 3 Synthetic fibres and plastics aim to deal with the types of synthetic fibres. It also talks about the processes involved in the formation of these fibres in laboratories. After studying the chapter thoroughly you will be able to attempt the exercise of NCERT textbook and get correct NCERT solutions for class 8 science chapter 3 Synthetic Fibres and Plastics
Fibres are of two types i.e. natural fibres and synthetic fibres.
Synthetic fibres are those fibres which are produced in laboratories using chemicals by man. Thus, they are also called man-made fibres. Synthetic fibres are made in such a way that small units join together to form them. These small units that are joined together are called monomers. After joining they form polymers which make up the synthetic fibres. Have you ever thought when we can get fibres from natural sources then why do we need to produce them in laboratories? Try to answer this question once you have read the chapter and attempted NCERT solutions for class 8 chapter 3 synthetic fibres and plastics.
Every day you use so many different types of synthetic fibres such as rayon, nylon, polyester and acrylic. In NCERT science class 8 chapter 3, you will study about the various characteristics of the above mentioned synthetic fibres. So what do you think “are synthetic fibres better natural fibres”? After reading chapter 3 synthetic fibres and plastics, you will be able to find out the answer to this question.
Everybody of you must have used objects made up of plastic. In NCERT class 8 chapter 3 Synthetic fibres and plastics, you will get to know the details about what is plastic, how it is made, what are its different characteristics and how they are useful to humans. Have you ever thought why plastic bags are now banned on grocery shops? Why everybody prefers to use paper cups and not plastic cups? You can get answers to these questions in NCERT science Ch 3 Synthetic fibres and plastics.
In the end, there are insights of biodegradable and non-biodegradable substances in your NCERT textbook science chapter 3. Do you segregate your waste when you dispose of them? If yes, then how do you segregate them? Why do we see blue, red, yellow and green dustbins on roads? You will be able to answer all these questions once you have gone through NCERT solutions for class 8 chapter 3 Synthetic fibres and plastics.
NCERT class 8 science chapter 3 Synthetic fibres and plastics- Topics
Different topics and subtopics are there in NCERT science class 8 Ch 3. These topics that you will get to learn in this chapter are :
3.1 What are synthetic fibres
3.2 Types of synthetic fibres
3.2.3 Polyester and acrylic
3.3 Characteristics of synthetic fibres
3.5 Plastics as materials of choice
3.6 Plastics and the environment
NCERT grade 8 science chapter 3 Synthetic fibres and plastics- Preparation tips
In order to prepare this chapter, write your own NCERT class 8 chapter 3 notes. Once are done with the chapter reading and have gone through this introduction to synthetic fibres and plastics, you can try solving NCERT class 8 chapter 3 synthetic fibres and plastics worksheets. For better practice attempt as many NCERT quizzes for science chapter 3 as possible. All the students ahould practice more and more question like the ones given below:
Q. Most women do not prefer to wear polyester clothes while working in the kitchen. Give reason
Ans.Polyester is a synthetic fabric that melts on heating. So if women wear polyester in the kitchen there are chances that on heating, it will melt and stick to the body causing destruction. Hence most women do not prefer to wear polyester clothes while working in the kitchen.
NCERT solutions for class 8 chapter 3 Synthetic fibres and plastics
Preparing the NCERT exercise of grade 8 Ch 3 is very important as far as the exams are concerned. You must prepare every question of NCERT science exercise. You can also refer to Questions and NCERT Solutions for Class 8 Science Chapter 3 Synthetic fibres and plastics to get a better understanding of what kind of questions are asked in exams.
Q3. Fill in the blanks with appropriate words.
(a) Synthetic fibres are also called __________ or __________ fibres.
(b) Synthetic fibres are synthesised from raw material called __________ .
(c) Like synthetic fibres, plastic is also a __________ .
Q7. Explain why the following are made of thermosetting plastics.
(a) Saucepan handles
Q15. Describe an activity to show that thermoplastic is a poor conductor of electricity.