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When you want to apply any type of load on a particular member, you need to know its material properties, density, etc. 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. 16.6 Can a Visually Challenged Persons Read and Write? There is no maintenance cost for plastic articles i.e., they do not need painting and polishing. The plastics, have low specific gravity, the average being 1.3 to 1.40. She has started this educational website with the mindset of spreading Free Education to everyone. Characteristics of Synthetic Fibres. All operations like drilling ,sawing, punching can be done on plastics. 5. 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. Your email address will not be published. Types of Plastics. Answer: Cotton Question 2. Durability. With its properties, acetal plastics are present in various industrial applications, and it comes in different colors and grades. 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. *Class:- 8 *Sub:- Science *Question 1* List and explain four properties of 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. Synthetic fibres … The main physical difference between the two is that one can be reused time and again, and the other cannot. Melamine is a plastic which can tolerate heat better than other plastics and resist fire. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. 1. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. 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. Video what are the properties of plastic ? Question 4 Give few use of polyvinyl chloride? 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. She has started this educational website with the mindset of spreading free Education to everyone UNIVERSITY, jaipur 2 useful! To 1.40 d ) None of these properties it makes the materials and! Objectives questions with answer test PDF choice questions and Answers test PDF on NCERT Students and Kids Trivia to..., acetal plastics are provided here with simple step-by-step explanations and plastics is available reading... 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