Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: bakelite, melamine, plastics, polythene, polyvinyl chloride, teflon. 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. Chemical Properties of Plastic. […] Name some artificial fibres. Since materials have these properties it makes the materials useful and purposeful to use. [9] FIXING. Your email address will not be published. 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. Synthetic fibres possess following unique characteristics: They are durable and inexpensive. 8. 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. 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. 8. Synthetic Fibres and Plastics Class 8 Science Chapter 3 - Synthetic Fibres and their Properties. 9. 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. The plastics posses excellent electric insulating properties. Melamine plastic is used in the uniforms of firemen which make them flame resistant. explains properties like plastic is nonreactive, plastic is light strong & durable, etc for CBSE Class 8 Science. Short Q&A: Q1: Differentiate between natural and artificial fibres. Plastic is non-reactive: (i) Plastics do not react with water and air that’s whyit does not get rusted like iron. 3. Special plastic cookware made of melamine is used in microwave ovens for cooking food. Answer: Protein Question 3. Depending on physical properties, plastics are divided into two types: Thermoplastic and thermosetting. The plastics, have low specific gravity, the average being 1.3 to 1.40. Synthetic fibres … 10.Name the plastic, which deformed easily on heating and can be bent easily. (a)Thermoplastics (b)Thermosetting 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. [10] MAINTENANCE. 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. TYPES OF PLASTIC. All operations like drilling ,sawing, punching can be done on plastics. Offer ending soon! Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. Plastics may be amorphous solids, crystalline solids, or semicrystalline solids (crystallites) or any other form of solids. Characteristics properties of plastics. For Ex:Polythene,Polyvinyl chloride,Bakelite,Melamine,teflon etc. Required fields are marked *. Plastics generally possess sufficient durability, provided they offer sufficient surface … In general different properties of materials are enlisted below. Acrylic plastic is a polymer material that contains acrylic acid. Characteristics of Synthetic Fibres. Your email address will not be published. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. Painting and polishing is not necessary. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. The main physical difference between the two is that one can be reused time and again, and the other cannot. It is used for making floor tiles,unbreakable kitchenware,ashtray and fire resistant fabric. It is used for making soles of electric irons,giving non-stick coating on cookwares. Which of the following properties of plastic makes it most convenient for use? Synthetic fibres are cheaper than natural fibre. 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. What properties of plastics make it useful for many things ? Plastics are an affordable material. NCERT Solutions Class 8 Science; Plastics. Plastics come from polymers, hence all plastics are polymers, but not all polymers are plastic. The plastics are not ductile and hence they fail without giving warning. 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. 1. Durability. 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. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. Characteristics of synthetic fibres. 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 2* List three steps you can take to reduce the danger that plastic pose to the environment? Answer: Nylon, terylene, PET, acrylic, teflon, etc. A plastic called Teflon is used in making Nonstick coat on the cookware. Teflon is a special plastic on which oil and water does not stick because it has slippery surface.It can withstand high temperature. They are cheap compared to metals. 2. Synthetic Fibres and Plastics class 8 Notes Science in PDF are available for free download in myCBSEguide mobile app. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. ... 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. 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. Question 8. 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. 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