In some, it is linear whereas in others it is cross-linked. Ans. On their way back home from the office, it starts raining. (a) PVC Fibres that are made or created by humans are known as synthetic or man-made fibres. Here are some important multiple choice question for you to revise from Synthetic Fibres and plastics . Give examples which indicate that nylon fibres are very strong. Used for making parachutes and stockings. The entire NCERT textbook questions have been solved by best teachers for you. For manufacturing synthetic fibres cutting of trees or killing of animals is not required … Q23. What is polymer? Why is nylon used for making parachutes and ropes for rock climbing? Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. 2. Your email address will not be published. 5. thermosetting plastic. Spandex is a synthetic fibre which was invented by Joseph Shivers in Virginia. It was made in 1931 for the first time. Â Rana wants to buy shirts for summer. 1. Plastics: (i) Plastic is also a polymer like the synthetic fibre. Plastic is also a polymer like the synthetic fibre. All the solutions present in this study material includes detailed explanations, more examples, formulas, tips and tricks, important questions, exemplar questions , MCQs and short answer questions. Polymer of vinyl chloride is ………………. Natural material is made from trees and synthetic materials are made from plastics Nylon is a polymer which is termed as: Answer: 'Manufacturing synthetic fibres is actually helping conservation of forests’ because synthetic fibres are man-made fibres. ………………… Nylon finds application in the manufacturing of socks, ropes, tents, car seat belts, sleeping bags, curtains etc. ………………. Synthetic fibres are synthesised from raw material called ………………… . Students and parents can download free a collection of all study material issued by various best schools in India. CBSE Class 8 Science Worksheet - Synthetic FIbres and Plastics - Practice worksheets for CBSE students. Â Explain why the following are made of thermosetting plastics: (a) Saucepan handles, (b) Electric plugs/switches/plug boards. Download Math, Science, English and Many More WorkSheets. Categorise the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’: Rayon is made from used cellulose. Synthetic Fibres And Plastics class 8 (Points to remember) Synthetic Fibres are human-made fibres made from polymers. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. A polymer is a substance composed of many repeated similar subunits. To know more about Properties of Plastics, visit here. Try to separate them into those made from natural fibres and those made from artificial fibres. Wool is a natural fibre obtained from plants. 10. Natural fibres are obtained frm plants or animals. This document is highly rated by Class 8 students and has been viewed 8405 times. Answer the following questions in short: 1. GSc. Fabrics are made of fibres which are obtained from natural and artificial sources. Synthetic fibres are also called …………….. or ……………….. fibres. (ii) It is easy to maintain, easy to wash, dry up in less time and readily available. 4. 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Make entries in the table given below: H. Complete the table given below. The wool obtained from natural sources is quite expensive, whereas clothes made from acrylic are relatively cheap. All polymers/plastics are ………………… . Coin a few more slogans of this kind. 2. Required fields are marked *. A material that decomposes through natural process is biodegradable and materials that are not easily decomposed by natural processes is termed as non-biodegradable. Synthetic Fibres and Plastics Class 8 Science NCERT Textbook Questions. It is a polymer of amides. 9. Synthetic Fibres and Plastics: Questions 1-5 of 82. Synthetic Fibres and Plastics UNIT II: CHEMICALS AND MATERIALS 2. 4. This is because rayon can be treated chemically. Prepared by teachers of the best CBSE schools in India. Like synthetic fibres, plastic is also a ……………… . The naturally occurring fibres that humans derive from plants or animals are known as natural fibres. Meetu is wearing a cotton suit and Ritu is wearing a nylon suit. (c) its fibres can also be woven like those of natural fibres 4. To know more about Rayon and Nylon, visit here. Nylon is used for making parachutes and ropes for rock climbing because nylon fibre is strong and can hold heavy weight. (d) polyvinyl, 3. – Plastic is a poor conductor. thermoplant plastics. Revision worksheets, Sample papers, Question banks and easy to learn study notes for all classes and subjects based on CBSE and CCE guidelines. Fibres can be classified into 2 main categories: natural and synthetic. The burning process in the synthetic material is quite slow and it does not get completely burnt easily. Here we have covered Important Questions on Synthetic Fibres and Plastics for Class 8 Science subject. Eg: cotton, wool, silk, etc. BAL BHARATI PUBLIC SCHOOL, G.R.H.MARG. (a) Saucepan handles To know more about Natural Fibres, visit here. 8th Science chapter 03 Synthetic Fibres and Plastics have many topics. Describe about nylon. Question 2. Here you can get Class 8 Important Questions Science based on NCERT Text book for Class VIII. CLASS -VIII. Free Question Bank for 8th Class Science Synthetic Fibers and Plastics Synthetic Fibres and Plastics CBSE Class 8 Science Worksheet - Synthetic Fibers And Plastics. (c) Bakelite and L.C.M. Play this game to review Science. The word ‘polymer’ comes from two Greek words; poly meaning many and mer meaning part/unit. of Polynomials | GCF and LCM of Polynomials Worksheets, Worksheet on L.C.M. Give examples which indicate that nylon fibres are very strong. Plastics are non-biodegradable. Humans have been able to make a variety of synthetic fibres. Answer: Some fibres are called synthetic fibres because they are made by man using chemicals. Explain why plastic containers are favoured for storing food. Natural fibres are obtained from natural sources such as animals and plants Solving the Synthetic Fibres and Plastics Multiple Choice Questions of Class 8 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Synthetic Fibres and Plastics Class 8 Extra Questions Long Answer Questions. It takes 10 kg of the cocoon material to create 1kg of silk. Give examples to show that plastics are non-corrosive in nature. and L.C.M. 7.Synthetic fibres prepared using raw materials of petroleum origin called _____ (a)Petrochemicals (b)Polyster (c)Acrylic (d)None of these. Mark ( ) the correct answer. Plastic, which gets deformed easily on heating and can be bent easily are known as thermoplastics. Get Revision notes of Class 8th Science Chapter 3 Synthetic fibres and plastics to score good marks in your Exams. Â Explain why plastic containers are favoured for storing food. Question 10: Ans. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. (a) PVC 4. …………….. F. Have you heard of the campaign: “Say No To Plastics”. Nylon is a synthetic fibre obtained from coal, water and air. Class 8 Science Synthetic Fibres and Plastics Important MCQs. (d) Nylon. Hope you like them and do not forget to like , social share and comment at the end of the page. Explain why plastic containers are favoured for storing food. Get to the point NSO Level 1- Science Olympiad (SOF) Class 8 questions for your exams. Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 8 Science Synthetic Fibres and Plastics. (d) Nylon, 4. (b) it is obtained from wood pulp 9._____ can be recycled, reused, melted and rolled into sheets. Wool, silk, and cotton are a few examples of natural fibres and fibres like polyesters and terylene are a few examples of synthetic fibres. of Polynomials | Highest Common Factor of Two or More Polynomials Worksheet |, Worksheet on H.C.F. Comment 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. (d) all of the above, 2. To know more about Synthetic Fibre, visit here. (b) polyester (b) Electric plugs/switches/plug boards Explain why some fibres are called synthetic. Which of the following is a thermosetting plastic? Telephone instruments, plastic toys, cooker handle, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. All these topics are inc… Power Sharing Class 10 Question Answers. Implement the 4 R principle in everyday life. Fibres are also used to make household articles. What are synthetic fibres and mention the importance of synthetic polymers in our life (5) 10. The process was discovered in China where it was kept as a closely guarded secret for a long time. Comment on this advice. Fabrics are made from fibres obtained from natural or artificial sources. Eg: Biodegradable – fruits, paper (a)Polyster (b)Plastics 3. All plastics do not have the same type of arrangement of units. Explain your answer. Which of the following is a polymer of tetrafluoroethene? Natural Fibres A fibre is a thin thread of a natural or artificial substance, especially one that is used to make cloth or rope. (a) it has silk-like appearance Silk fibre is obtained from the cocoon of a silkworm. G. Fibres are also used for making a large variety of household articles. 3. NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics All the NCERT solutions are framed in a systematic manner, according to the latest CBSE Class 8 science syllabus (2020-21). Question 1. Advise Rana, giving your reason. of Monomials | GCF and LCM of Monomials Worksheet, b. Synthetic FIbres and Plastics. Grade 8 Chapter 3 Synthetic fibres and plastics | ncertsciencesite CHAPTER 3 SYNTHETIC FIBRES AND PLASTICS Fabrics are made from fibres obtained from natural or artificial sources. View Answer Q2: Define polymer and give example of a polymer occurring in nature. . SA-I. Synthetic fibres and plastics 1. (b) Teflon Should the handle and bristles of a tooth brush be made of the same material? A. Describe an activity to show that thermoplastic is a poor conductor of electricity. Answer: Nylon is the strongest amongst all the synthetic fibres. ……………….. (i) Synthetic fibres are cheaper, stronger and durable than natural fibre. Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: artificial silk, rayon, semi-synthetic fibre, uses of rayon, viscose About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. 12. Solution : Plastics which when moulded once cannot be softened by heating are called thermosetting plastics. Answer the following questions in short: 1. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. It releases lots of poisonous fumes into the atmosphere causing air pollution in the process. 7. Question 1. Plastics that can be moulded once and cannot be softened by heating are. Explain the difference between thermoplastic and thermosetting plastics. 11. Fibres are also used for making a large variety of household articles. Clothes that we wear on a daily basis are made of fabrics. Manufacturing synthetic fibres is actually helping conservation of forests. The first fully synthetic fibre obtained was nylon. Synthetic fibres and plastics Worksheet-5 Â What are the properties of polythene? … 15. Explain why some fibres are called synthetic. – Plastic is light, strong and durable Your email address will not be published. (iii) Synthetic fibres possess unique characteristics which make them popular dress materials. That is why it finds such a variety of uses. Synthetic fibres are more durable and affordable which makes them more popular than natural fibres. Science worksheets for class 8 CBSE includes worksheets on Synthetic Fibres and Plastics as per NCERT syllabus. 4. Topics covered are Introduction to fibres, kinds of fibres. ASSIGNMENT No. It is fully synthetic polymer which is prepared from coal, water and air. Class 8 Chapter 3 Synthetic Fibres and Plastics includes different topics like synthetic fibres meaning, types of synthetic fibres, their characteristics, plastics, benefits of plastics, use of plastic as a choice, hazards of plastic on the environment, and exposure to … Explain why the following are made of thermosetting plastics: CBSE Class 8 Science Chapter 3 Notes: Synthetic Fibres And Plastics. The characteristic properties are that it is light, strong, and elastic. Science Class 8 Important Questions are very helpful to score high marks in board exams. 13. Define natural fibres. 14. Eg: bakelite and melamine. thermoplastics. Rana wants to buy shirts for summer. Science Important Questions Class 8 are given below. A. 2. Explain why some fibres are called synthetic. CBSE chapter-wise Printable Worksheets with the solution for class 8 Science chapter 03 Synthetic Fibres and Plastics for free download in PDF format. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Polymers: Are large molecules formed by the union of monomers. (c) polyamine View Answer. 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Been Solved grade 8 synthetic fibres and plastics best teachers for you: Notify me of follow-up comments by.! Know more about Biodegradable and materials that are not easily decomposed by natural processes termed! Solved by best teachers for you: Notify me of follow-up comments by email by! It does not get completely burnt easily that are made of repeating units of a called. To fibres, nylon fibres are also called …………….. or ………………...... More popular than natural fibre rock climbing F. have you heard of the best cbse schools India. Wise cbse Solved Question and Answer based on NCERT.. fibres about Effects of Plastics can... Should he buy cotton shirts or shirts made from synthetic fibres is actually helping conservation of ’! Is Biodegradable and non-biodegradable materials, visit here rayon comes from natural and artificial fibres PDF free download give to. Paper Non Biodegradable – plastic is also a polymer like the synthetic fibre is. 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