Define natural fibres. Your email address will not be published. Question 1. 11. It releases lots of poisonous fumes into the atmosphere causing air pollution in the process. Wool, silk, and cotton are a few examples of natural fibres and fibres like polyesters and terylene are a few examples of synthetic fibres. Plastic is also a polymer like the synthetic fibre. What are synthetic fibres and mention the importance of synthetic polymers in our life (5) 10. Solution : Plastics which when moulded once cannot be softened by heating are called thermosetting plastics. Short Q&A: Q1: Differentiate between natural and artificial fibres. Synthetic fibres and plastics Worksheet-5 Â What are the properties of polythene? 4. 4. 2. (i) Synthetic fibres are cheaper, stronger and durable than natural fibre. The wool obtained from natural sources is quite expensive, whereas clothes made from acrylic are relatively cheap. 10. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. Nylon is a polymer which is termed as: (a) PVC Eg: polythene and PVC. 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 … (ii) It is easy to maintain, easy to wash, dry up in less time and readily available. Answer: Some fibres are called synthetic fibres because they are made by man using chemicals. The characteristic properties are that it is light, strong, and elastic. Here you can get Class 8 Important Questions Science based on NCERT Text book for Class VIII. A material that decomposes through natural process is biodegradable and materials that are not easily decomposed by natural processes is termed as non-biodegradable. Ans. This document is highly rated by Class 8 students and has been viewed 8405 times. These MCQ Questions on Synthetic Fibres and Plastics Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.. For a better understanding of … (d) polyvinyl, 3. Cotton polyester blends are more comfortable during hot/humid weather. Synthetic Fibres and Plastics UNIT II: CHEMICALS AND MATERIALS 2. Nylon finds application in the manufacturing of socks, ropes, tents, car seat belts, sleeping bags, curtains etc. Clothes that we wear on a daily basis are made of fabrics. Explain why some fibres are called synthetic. Polymers: Are large molecules formed by the union of monomers. 2. Download Math, Science, English and Many More WorkSheets. Question 1. In class 8 science chapter 3, the various types of synthetic fibres along with their characteristics are mentioned. One has been done for you: Notify me of follow-up comments by email. Fabrics are made of fibres which are obtained from natural and artificial sources. On their way back home from the office, it starts raining. Plastics that can be moulded once and cannot be softened by heating are. These fibres are made from petrochemicals. To know more about Synthetic Fibre, visit here. To know more about Natural Fibres, visit here. Rana wants to buy shirts for summer. (b) Electric plugs/switches/plug boards Answer: 'Manufacturing synthetic fibres is actually helping conservation of forests’ because synthetic fibres are man-made fibres. 14. Eg: bakelite and melamine. Can you identify that whose clothes will get dry earlier and why? 12. A polymer is a substance composed of many repeated similar subunits. . Play this game to review Science. Dec 21, 2020 - Synthetic Fibers and Plastics - PPT, Science, Class 8 Class 8 Notes | EduRev is made by best teachers of Class 8. … Fabrics are made of fibres which are obtained from natural and artificial sources. Q1.Describe three demands of Sri Lankan Tamils. Why plastic can be molded into any shape and size and why is it advised to avoid the use of plastics as far as possible, also suggest some methods to limit its consumption (5) (c) polyamine Like synthetic fibres, plastic is also a ……………… . Synthetic Fibres and Plastics Class 8 Extra Questions Long Answer Questions. Explain your answer. It is best suited for the making of dress materials as it is crisp and is easy to wash. Acrylic is a synthetic fibre that resembles wool. Should the handle and bristles of a tooth brush be made of the same material? Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. 4. Fibres can be classified into 2 main categories: natural and synthetic. Nylon is used for making parachutes and ropes for rock climbing because nylon fibre is strong and can hold heavy weight. Science worksheets for class 8 CBSE includes worksheets on Synthetic Fibres and Plastics as per NCERT syllabus. (d) Nylon. (c) its fibres can also be woven like those of natural fibres Question 2. GSc. 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). To know more about uses of Polyester, visit here. (d) Nylon, 4. Implement the 4 R principle in everyday life. Polyester is made of repeating units of a chemical called an ester. of Polynomials | Least Common Multiple of Polynomials Worksheets, Worksheet on Probability | Free Printable Probability Worksheets to Practice, Worksheet on H.C.F. ASSIGNMENT No. Answer the following questions in short: 1. thermoplant plastics. Describe about nylon. Synthetic Fibres and Plastics Class 8 Science NCERT Textbook Questions. of Polynomials | Highest Common Factor of Two or More Polynomials Worksheet |, Worksheet on H.C.F. of Monomials | GCF and LCM of Monomials Worksheet, b. Comment on this advice. To know more about Biodegradable and Non-Biodegradable Materials, visit here. thermoplastics. (c) Bakelite Fibres are also used to make household articles. Synthetic FIbres and Plastics. Why is nylon used for making parachutes and ropes for rock climbing? For manufacturing synthetic fibres cutting of trees or killing of animals is not required … Fabrics are made from fibres obtained from natural or artificial sources. Categorise the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’: Get to the point NSO Level 1- Science Olympiad (SOF) Class 8 questions for your exams. 3. Explain why some fibres are called synthetic. Ans. Q23. ‘Avoid plastics as far as possible’. 3. Humans have been able to make a variety of synthetic fibres. Which of the following is a polymer of tetrafluoroethene? 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. Synthetic Fibres and Plastics. The first fully synthetic fibre obtained was nylon. Coin a few more slogans of this kind. Rayon is different from synthetic fibres because: Rayon is made from purified cellulose, which is chemically converted into a soluble compound. The process was discovered in China where it was kept as a closely guarded secret for a long time. (a) PVC Natural Fibres A fibre is a thin thread of a natural or artificial substance, especially one that is used to make cloth or rope. CLASS -VIII. It takes 10 kg of the cocoon material to create 1kg of silk. (d) all of the above, 2. Science Important Questions Class 8 are given below. thermopet plastics. 4. (a) polyamide The word ‘polymer’ comes from two Greek words; poly meaning many and mer meaning part/unit. Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Science for Class 8 so that you can refer them as and when required. A. Nylon is a synthetic fibre obtained from coal, water and air. Fibres are also used for making a large variety of household articles. When rayon is compared with silk, it is inexpensive but can be woven like silk fibres. The entire NCERT textbook questions have been solved by best teachers for you. Synthetic Fibres and Plastics: Questions 1-5 of 82. 8th Science chapter 03 Synthetic Fibres and Plastics have many topics. (b) it is obtained from wood pulp Wool, silk, and cotton are a few examples of natural fibres and fibres like polyesters and terylene are a few examples of synthetic fibres. Get Revision notes of Class 8th Science Chapter 3 Synthetic fibres and plastics to score good marks in your Exams. Plastic, which gets deformed easily on heating and can be bent easily are known as thermoplastics. thermosetting plastic. SA-I. It is used in making sarees, ties, etc. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Fabrics are made from fibres obtained from (fabrics un fibres se bnti Hein Jo milte hei-) 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. Required fields are marked *. CBSE worksheets for Synthetic Fibres and Plastics worksheet for class 8 for class 8 in PDF for free download. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics. Â Explain why plastic containers are favoured for storing food. Fibres that are made or created by humans are known as synthetic or man-made fibres. Revision worksheets, Sample papers, Question banks and easy to learn study notes for all classes and subjects based on CBSE and CCE guidelines. Explain why plastic containers are favoured for storing food. CBSE chapter-wise Printable Worksheets with the solution for class 8 Science chapter 03 Synthetic Fibres and Plastics for free download in PDF format. NCERT Solutions Class 8 Science Chapter 3 Synthetic Fibres And Plastics. The burning process in the synthetic material is quite slow and it does not get completely burnt easily. 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Synthetic fibres are synthesised from raw material called ………………… . 7.Synthetic fibres prepared using raw materials of petroleum origin called _____ (a)Petrochemicals (b)Polyster (c)Acrylic (d)None of these. (iii) Synthetic fibres possess unique characteristics which make them popular dress materials. Eg: rayon, nylon etc. 15. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Explain why some fibres are called synthetic. Plastics: (i) Plastic is also a polymer like the synthetic fibre. Give examples which indicate that nylon fibres are very strong. Topics covered are Introduction to fibres, kinds of fibres. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. of Polynomials | GCF and LCM of Polynomials Worksheets, Worksheet on L.C.M. (a) Saucepan handles 3. (b) Teflon (b) polyester Synthetic fibres are also called …………….. or ……………….. fibres. Â Rana wants to buy shirts for summer. 1. Here we have covered Important Questions on Synthetic Fibres and Plastics for Class 8 Science subject. What is polymer? Science Class 8 Important Questions are very helpful to score high marks in board exams. CBSE Class 8 Science Worksheet - Synthetic Fibers And Plastics. Make entries in the table given below: H. Complete the table given below. Advise Rana, giving your reason. Meetu is wearing a cotton suit and Ritu is wearing a nylon suit. 5. Rayon is different from synthetic fibres because (a) it has a silk-like appearance. Explain why plastic containers are favoured for storing food. Used for making parachutes and stockings. CBSE Class 8 Science Chapter 3 Notes: Synthetic Fibres And Plastics. View Answer. – Plastic is a poor conductor. 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. The naturally occurring fibres that humans derive from plants or animals are known as natural fibres. 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. Make a list of some common articles made from fibres. Mark ( ) the correct answer. To know more about Properties of Plastics, visit here. Correct Option is : 2. Answer: Nylon is the strongest amongst all the synthetic fibres. Following are the 4Rs: Learn more about synthetic fibres and plastics and other related topics including CBSE class 8 Science notes, at BYJU’S. (b) Teflon 9._____ can be recycled, reused, melted and rolled into sheets. Natural fibres are obtained from natural sources such as animals and plants All polymers/plastics are ………………… . Polymer of vinyl chloride is ………………. Plastics are non-biodegradable. Manufacturing synthetic fibres is actually helping conservation of forests. Prepared by teachers of the best CBSE schools in India. 7. Silk is costly due to the material quality and production process involved. All plastics do not have the same type of arrangement of units. 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. 8. Comment (c) Bakelite 6. Rayon comes from natural sources such as wood pulp but is considered as a man-made fiber. G. Fibres are also used for making a large variety of household articles. Plastic takes several years to decompose, it is not environmental friendly. Class 8 Science Synthetic Fibres and Plastics Important MCQs. This is because rayon can be treated chemically. Our notes of Chapter 3 Synthetic fibres and plastics are prepared by Maths experts in an easy to remember format, covering all syllabus of CBSE, KVPY, NTSE, Olympiads, NCERT & other Competitive Exams. Natural material is made from trees and synthetic materials are made from plastics Eg: cotton, wool, silk, etc. and L.C.M. The clothes, which we wear are made of fabrics. ………………. Rayon is made from used cellulose. ‘Manufacturing synthetic fibres is actually helping conservation of forests.’ Comment. Thermosets: Type of plastics that cannot be remoulded once set.. Download free Synthetic fibres and plastics worksheet for Class 8. (a) it has silk-like appearance View Answer Q2: Define polymer and give example of a polymer occurring in nature. – Plastic is light, strong and durable Explain the difference between thermoplastic and thermosetting plastics. Cellulose, which we wear on a grade 8 synthetic fibres and plastics basis Answers were prepared based on NCERT from or! 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