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The main physical difference between the two is that one can be reused time and again, and the other cannot. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. 6. 11. Name a natural fibre. 8. TYPES OF PLASTIC. Which of the following properties of plastic makes it most convenient for use? Melamine is a plastic which can tolerate heat better than other plastics and resist fire. Pupils investigate the properties of plastics then find solutions to problems caused by plastic waste globally An exciting challenge for pupils aged 8-14 years to develop solutions to the problems caused by plastic waste globally. Properties of plastics vary depending on the chemical composition, arrangements and the processing method of its subunits. 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. Living Science Solutions for Class 8 Science Chapter 3 Synthetic Fibres And Plastics are provided here with simple step-by-step explanations. Bakelite:It is a very hard and tough plastic.It is a poor conductor of heat and electricity. The challenge can be used flexibly as part of the formal science and design and technology curriculum in the UK, […] Durability. For Ex:Polythene,Polyvinyl chloride,Bakelite,Melamine,teflon etc. Plastic has light weight, lower price, good strength and easy handling. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. Answer: Protein Question 3. Plastics are also polymers.They consist of very long molecules made by joining many small molecules together. Characteristics properties of plastics. For chemically resistant plastic, view our Chemical Resistance of Plastics chart. They are light weight, smooth and soft than any other fibre. NCERT Solutions Class 8 Science; Plastics. Plastics can be bolted, drilled, glued, clamped or simply push fitted in position. 9. Synthetic fibres are those which are man-made and are obtained by the combination of different types of chemical substance and raw materials such as petrochemicals. The lesson covers the complete explanation of class 8 Chapter 4 Metals and Non Metals.Topics covered are Introduction to metals, physical and chemical properties of metals. 5. Short Q&A: Q1: Differentiate between natural and artificial fibres. Question 8 Write 2 characteristics of bakelite? Thermoplastic: Plastics that can be deformed easily upon heating and can be bent easily.Linear polymers and a combination of … Question 10 Write 1 characteristics of teflon? Synthetic fibres are cheaper than natural fibre. Plastic is a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be moulded into shape while soft, and then set into a rigid or slightly elastic form. There is no maintenance cost for plastic articles i.e., they do not need painting and polishing. 10.Name the plastic, which deformed easily on heating and can be bent easily. (a)Thermoplastics (b)Thermosetting Synthetic fibres possess following unique characteristics: They are durable and inexpensive. CBSE Science Class 8. 16. 3. Polythene:It is a plastic obtained by the polymerisation of a chemical compound known as ethene.It is tough and durable.It is used in making polythene bags,waterproof plastic sheets, bottles,buckets,dustbins. For that, in this article, I am exploring the necessary properties of polymers in a detailed manner. 1. Depending on physical properties, plastics are divided into two types: Thermoplastic and thermosetting. In general different properties of materials are enlisted below. Your email address will not be published. Polyvinyl chloride:It is a strong and hard plastic.It is not as flexible as polythene.It is used for making insulation for electric wires,pipes,garden hoses,raincoats,seat cover etc. The plastics that act as insulators mostly have a high dielectric strength. Types of Plastics. ... NCERT Solutions for Class 8 Science Chapter 3 – 5 Mark Questions and Answers. They are cheap compared to metals. Question 8. 10. Name the basic component of animal fibres. 16.06 Can a Visually Challenged Persons Read and Write? Your email address will not be published. It is used for making soles of electric irons,giving non-stick coating on cookwares. Plastics may be amorphous solids, crystalline solids, or semicrystalline solids (crystallites) or any other form of solids. NCERT Book for Class 8 Science Chapter 3 Synthetic Fibers and Plastics is available for reading or download on this page. [9] FIXING. A plastic called Teflon is used in making Nonstick coat on the cookware. [10] MAINTENANCE. Answer: Nylon, terylene, PET, acrylic, teflon, etc. What properties of plastics make it useful for many things ? These solutions for Synthetic Fibres And Plastics are extremely popular among Class 8 students for Science Synthetic Fibres And Plastics Solutions come handy for quickly completing your homework and preparing for exams. 2. Painting and polishing is not necessary. A plastic is a synthetic material which can be moulded or set into desired shape when soft and then hardened to produce a durable article. explains properties like plastic is nonreactive, plastic is light strong & durable, etc for CBSE Class 8 Science. A) It is non-reactive. Plastic is non-reactive: (i) Plastics do not react with water and air that’s whyit does not get rusted like iron. They are poor conductors of heat and electricity. Answer: Cotton Question 2. Oil and Water do not stick on a plastic called Teflon,So Teflon coating is used in utensils FireProof Melamine Plastics do not catch fire easily So they are used to make uniform of fireman which makes them flame resistant Disadvantages of Using Plastics Plastics are Non Biodegradable They do not get easily decomposed by natural processes Characteristics of synthetic fibres. [8] DUCTILITY. This strong and transparent plastic is a popular choice for light fixtures, beverage dispensers, and dishes. Characteristic properties of plastics: 1. Plastics are an affordable material. The best app for CBSE students now provides Synthetic Fibres and Plastics class 8 Notes Science latest chapter wise notes for quick preparation of CBSE exams and school-based annual examinations. Question 9 Write 2 characteristics of melamine? Plastic is strong, light and durable. Properties of Plastics or Polymers: Properties of plastics or polymers play a vital role in the field of Mechanical Engineering. With its properties, acetal plastics are present in various industrial applications, and it comes in different colors and grades. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. Synthetic Fibres and Plastics class 8 Notes Science in PDF are available for free download in myCBSEguide mobile app. All operations like drilling ,sawing, punching can be done on plastics. MCQ quiz on Plastics multiple choice questions and answers on Plastics MCQ questions quiz on Plastics objectives questions with answer test pdf. Plastics generally possess sufficient durability, provided they offer sufficient surface … The plastics industry is a significant contributor to the global economy. *Class:- 8 *Sub:- Science *Question 1* List and explain four properties of plastics? Students who are in Class 8 or preparing for any exam which is based on Class 8 Science can refer NCERT Science Book for their preparation. It is used for making floor tiles,unbreakable kitchenware,ashtray and fire resistant fabric. It is non-reactive; Plastic is a poor conductor. Acrylic plastic is a polymer material that contains acrylic acid. *Question 2* List three steps you can take to reduce the danger that plastic pose to the environment? PLASTIC 1. The plastics posses excellent electric insulating properties. Plastics come from polymers, hence all plastics are polymers, but not all polymers are plastic. Give one use of plastics linked to each of these properties? To understand the properties of material explore the article! Melamine plastic is used in the uniforms of firemen which make them flame resistant. A plastic is a synthetic material which can be moulded or set into desired shape when soft and then hardened to produce a durable article. See other topics from Chapter 3 Synthetic Fibres and Plastics, Biodegradable and Non-biodegradable material, Steps to save environment from plastic waste, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 5 – उत्साह और अट नहीं रही है, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 4 – आत्मकथ्य, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 3 – सवैया, कवित्त – देव, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 2 – राम लक्ष्मण परशुराम संवाद, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 1 – पद. Synthetic fibres … Question 2 Give few examples of plastics? Dismiss, 1.1 Agricultural Practices and Cropping Pattern, 1.01 Agricultural Practices and Cropping Pattern, 1.06 Protection from Weeds and Harvesting, 1.07 Storage of Foodgrains and Food From Animals, Chapter 1 Crop Production and Management - Test, 2.1 Microorganisms: Classification and Habitat, 2.01 Microorganisms: Classification and Habitat, 2.04 Food Preservation and Food Poisoning, 2.05 Nitrogen Fixation and Nitrogen Cycle, Chapter 2 Microorganisms Friend and Foe - Test, 3.1 Synthetic Fibres and their properties, 3.01 Synthetic fibres and their properties, Chapter 3 Synthetic Fibres and Plastics - Test, 7.01 Physical Properties of Metals and Nonmetals, 4.01 Physical Properties of Metals and Nonmetals, 7.02 Chemical Properties of Metals and nonmetals: Reaction with Oxygen and Water, 4.02 Chemical Properties of Metals and Nonmetals: Reaction with Oxygen and Water, 7.03 Chemical Properties of Metals and Nonmetals: Reaction with Acids and Bases, and Displacement Reaction, 4.03 Chemical Properties of Metals and Nonmetals: Reaction with Acids and Bases, and Displacement Reaction, Chapter 4 Materials: Metals and Nonmetals - Test, 10.2 Types of Combustion Reaction, Ignition Temperature and Fire Control, 6.02 Types of Combustion Reaction, Ignition Temperature and Fire Control, 6.3 Conservation of Forest and Wildlife: Wildlife Sanctuary and Biosphere Reserve, 7.03 Conservation of Forest and Wildlife: Wildlife Sanctuary and Biosphere Reserve, 6.4 Conservation of Forest and Wildlife: National Park, 7.04 Conservation of Forest and Wildlife: National Park, 7.05 Recycling of Paper and Reforestation, Chapter 7 Conservation of Plants and Animals - Test, 11.2 Variety in Cell Number, Shape and Size, 8.02 Variety in Cell Number, Shape and Size, 10.01 Structure, Function and Parts of Cell: Basic Components, 8.03 Structure, Function and Parts of Cell: Basic Components, 10.02 Structure, Function and Parts of Cell: Other Components and Comparison of Plant and Animal cells, 8.04 Structure, Function and Parts of Cell: Other Components and Comparison of Plant and Animal cells, Chapter 8 Cell - Structure and Functions - Test, 12.2 Sexual Reproduction: Reproductive System, 9.02 Sexual Reproduction: Reproductive System, 13.1 Adolescence, Puberty and Reproductive Phase of Life, 10.01 Adolescence, Puberty and Reproductive Phase of Life, Chapter 10 Reaching The Age Of Adolescence - Test, 3.05 Pressure exerted by Gases and Atmospheric Pressure, 11.07 Pressure exerted by Gases and Atmospheric Pressure, 8.3 Increasing and Decreasing the Friction, 12.03 Increasing And Decreasing The Friction, 9.4 Amplitude, Time Period And Frequency of Vibration, 13.04 Amplitude, Time Period And Frequency of Vibration, 14.02 Chemical Effect of Electric Current, Chapter 14 Chemical Effects of Electric Current - Test, 15.1 Electric Charge: Nature, Types and Transfer, 15.01 Electric Charge: Nature, Types and Transfer, 16.3 Multiple Images, Kaleidoscope and Dispersion, 16.03 Multiple Images, Kaleidoscope and Dispersion. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. Materials are most of all the objects and therefore materials have its own properties. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. 9. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. (a)Polyster (b)Plastics (c)Both of these (d) None of these. 8. Also, you may want to use our Plastic Material Selection Guide or Interactive Thermoplastics Triangle to assist with the material selection process based on your application requirements. They can be made transperent or color. Hurry! ... We can modify the chemistry of the material to provide specific beneficial properties for its end use, including the option to make it softer, harder, malleable, or durable. Since materials have these properties it makes the materials useful and purposeful to use. Class 8 Science Plastics Notes and Important Points Plastics Any Synthetic material which can be easily moulded into any desired shape on heating is called plastic.Plastic is also a polymer like the synthetic fibres.There are two types of arrangement in plastics linear and cross linked. Plastic uses in various fields. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. 4. Offer ending soon! Name some artificial fibres. Last Updated on September 29, 2020 By Mrs Shilpi Nagpal 3 Comments. Teflon is a special plastic on which oil and water does not stick because it has slippery surface.It can withstand high temperature. 16.6 Can a Visually Challenged Persons Read and Write? Polymer: The term polymer id derived from two greek words POLY meaning many and MER meaning units.Therefore polymer refers to combination of repeating units. It’s … 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. There are two primary forms of plastic: thermoplastic and thermoset plastics, the use of which is dependent on the application. Answer: Plastics can be recycled, reused, coloured, melted, rolled into sheets or made into wires, so they are very useful. Characteristics of Synthetic Fibres. […] Special plastic cookware made of melamine is used in microwave ovens for cooking food. Chapter 17 Stars and The Solar System - Test, 8.03 Global Warming and Greenhouse Effect, 18.03 The Biogeochemical Cycles - Carbon Cycle and Greenhouse Effect, 18.4 The Oxygen cycle and The Ozone Layer, 18.04 The Oxygen Cycle and The Ozone Layer, 18.8 Pollution of Ganga River: A Case Study, 18.08 Pollution of Ganga River: A Case Study, 18.9 Purification of water and ways to reduce water pollution, 18.09 Purification of water and ways to reduce water pollution, Chapter 18 Pollution of Air and Water - Test. Being lighter as compared to metals, plastics are used in cars, aircrafts and spacecrafts, too. Apply coupon WELCOME21 at checkout and avail 21% discount on your order. The plastics, have low specific gravity, the average being 1.3 to 1.40. It is used for making the handles of various cooking utensils(fry pans,pressure cooker) because, 2)It does not become soft on getting heated, It is used for making electric switches,plugs and sockets because. Video what are the properties of plastic ? Chemical Properties of Plastic. 7. The plastics are not ductile and hence they fail without giving warning. Plastics are also polymers.They consist of very long molecules made by joining many small molecules together. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: bakelite, melamine, plastics, polythene, polyvinyl chloride, teflon. She has started this educational website with the mindset of spreading Free Education to everyone. Synthetic Fibres and Plastics Class 8 Science Chapter 3 - Synthetic Fibres and their Properties. Synthetic Fibres and Plastics. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Question 4 Give few use of polyvinyl chloride? Required fields are marked *. 9._____ can be recycled, reused, melted and rolled into sheets. When you want to apply any type of load on a particular member, you need to know its material properties, density, etc. Polyethylene Terephthalate (PET or PETE or Polyester) PET is also known as a wrinkle-free fiber. The NCERT Solutions for Class 8 science chapter 3 contains all the information about NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and plastics. By joining many small molecules together unique Characteristics: they are durable and inexpensive a detailed.! Characteristics of synthetic fibres like, Rayon fibres, Polyester fibres and plastics Class 8 Science Chapter 3 Fibers... Polymers, hence all plastics are also polymers.They consist of very long molecules by! Microwave ovens for cooking food different colors and grades UNIVERSITY, jaipur 2 between and. Plastics can be recycled, reused, melted and rolled into sheets is non-reactive ; plastic is a which! 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