Explain why the following … Wool is a natural fibre obtained from the body of many animals. Multiple Choice Questions Question. The monomers involved in the synthesis of proteins are: Wood. Students can get how to tackle different questions easily by solving the Extra Questions for Class 8 Science Question bank on a regular basis. Synthetic Fibres and Plastics Class 8 Extra Questions and Answers Science Chapter 3 PDF are solved by experts and will guide students in the right direction. (b) Nylon Is a synthetic fibre. a. Cellulose is a polymer that is made up of a large number of small glucose molecules joined one after the other. Natural fibres – fibre forming material is of the natural origin. (a) Cotton (b) Jute (c) Wool (d) Polyster 3. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. NCERT Book for Class 8 Science Chapter 3 Synthetic Fibers and Plastics is available for reading or download on this page. The portion of the hair containing its scales is: Amino Acids. The fibres which are obtained by blending natural and synthetic fibres are called (a) joint fibres (b) mixed fibres (c) real fibres (d) artificial fibres 2. c. The small molecules that join together to form a polymer are … (a) Acrylic (b) Nylon (c) Polyester (d) Rayon 5._____is a kind of fibre that resembles wool. Chapter 3. Question-answers (Fibre to Fabric) Multiple Choice Questions 1. Explain the difference between thermoplastic and thermosetting plastics. The fibres are then separated from the stem in long strands and washed in clear, running water. 4._____is called an artificial silk. 4. (a) Plastic (b) Wood (c) Cement (d) Nylon. 2. 3. (a) Cotton (b) Nylon (c)Jute (d)Wool Answer. Answer the following questions in short: 1. Digital NCERT Books Class 8 Science pdf are always handy to use when you do not … Man made fibres are considered under two main headings. Cellulose is the basic component of: The cuticle. A. The natural fibres which are obtained from these animals are utilised for the production of wool. None of the answers are correct; there's no real difference between synthetic and natural fibers. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres … Synthetic fibres do not absorb_____. Wood contains a very less amount of cellulose polymer. NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. The fibres in this category may be classified into the following sub groups. C. Write 'T' for True or 'F' for False for the following sentences :-1. Which of the following statements is/are false ? 3._____plastics do not become soft on heating and cannot be reshaped. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Polymers are micro sized molecules. Synthetic fibres – fibre forming material is made from simpler substances. Polyester and nylon are the examples of synthetic fibre… 2. Plastics are non bio … In which […] Give examples which indicate that nylon fibres are very strong. Which of the following properties should not be examined when comparing two synthetic fibers? 2. Explain why plastic containers are favoured for storing food. 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. Which synthetic fibre is called artificial silk? Play this game to review Science. 2. b. Natural Polymer Fibres. After harvesting, the stalks of jute plants are bundled together and soaked in water for about 20 days. 1 Pick the synthetic fibre out of the following. Explain why some fibres are called synthetic. Here we have given NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. 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