True. The natural fleece or hair of sheep (or goat) is white, brown or black in colour. Then, it swings its head from side to side. Answer: (a)-(iii); (b)-(iv); (c)-(ii); (d)-(i). [Value Based Question] Answer: Answer: (c) making silk fabric from silk yarn Explain the phrase – ‘Unity is Strength’ on the basis of the making of fabric from fibre. You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ Four different types of fibres are given to us. The cocoons are put in boiling water to loosen the silk fibre. (b) rearing of silkworm, Question 9. There are following two types of fibres that form the hair to sheep. (d) the process of taking silk threads from cocoon It leads to a fatal blood disease called sorter’s disease. They are the smallest visible unit of a fabric and denoted by being extremely long in relation to their width. Such as yak wool is common in Tibet and Ladakh. Question 6. The eggs are hatched into very small larvae within a week. True. Question 13. Sheep are herbivores, so which type of feed (or food) is provided by shepherds? of silk moth. Answer: (a) removal of fleece. The silk yarn is obtained from the cocoon of the silk moth. The fleece of sheep (or cut hair of sheep) contains dust, dirt, dried sweat and grease, etc. (b) rearing of silkworm. (wool and silk are animal fibres). B) done clear. Explain the quality of wool they provide and the state where they are found. [NCERT Exemplar; HOTS] Silk fibre belongs to which class of organic substance? One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. (C)  cocoon   is the  correct   answer........ Answer is cocoon because slik made naturally with the help of silk worm when it die worm release the sticky thing that is silk, what is the is electronic configuration for valence shell of oxygen​, agar koi bhi muslims or hindu hai tu eska answer touhindu .ramzan me rammuslim .diwali me aliramzan .diwali ​we brothers are Indians​, Tumlog pgl ho kya?Question dekh k answer karo Yar, yeh sab mat karo pleaseMain iss answer Kya karu?​, 2What is the correct electron diagram for potassiumfluoride?2.AKFB72+72-88% FC с12+2-KD$86 KF​, Guddd Mrng Legends........Have a nyccc day.......​, 6] Identify the type of intermolecules forcescompounds of CH2OH, CHCl3 , CH2 - CH2​, agar koi bhi muslims or hindu hai tu eska answer touhindu .ramzan me rammuslim .diwali me aliramzan .diwali ​​, How many moles of chlorine are needed to replace 0.0230 moles of sodium iodide? How silkworms are reared? Name the four given fibres marked 1,2, 3 and 4. [NCERT Exemplar] Question 8. Answer: Answer: Answer: (a) Eggs of silk moth … How? Answer: It is produced in most parts of the planet. The larvae of silk moth are called caterpillar or silkworm. Answer: Answer: The thread which burns giving a smell of burning paper will be artificial silk thread. Answer: Question 1. Silk fibres come from cocoons of the silk moth. … (b) separating hair of different textures Silk (78% protein) is much stiffer than wool in spite of both being proteins made from amino acids chains. Wool and silk are animal fibres. The pupa inside the cocoon dies. (cotton and jute are plant fibres). Answer: [HOTS] Accidentally, a cocoon dropped into her cup of tea and a tangle of delicate threads separated from the cocoon. Answer: Silk fibres are made up of a ……. Ajay discussed this problem with his friends and he came to know that his father is getting health problems due to the nature of his work. The rearing of silkworms for obtaining silk is called [NCERT Exemplar] cocoons, Question 7. n Class VI you have learnt about some fibres obtained from plants. Soon the silkworm (or caterpillar) covers itself by silk fibres and turns into pupa. The process of separating the fleece of a sheep into sections according to the quality of woollen fibres (such as fine, coarse, long, short, etc) is called sorting. 7. Answer: Small racks or twigs may be provided in the trays to which cocoons get attached. Wool is obtained from the fleece (hair) of sheep or yak. Question 15. Question 18. Silk fibres come from of silk …….. [NCERT Exemplar] The stage next to caterpillar in the life cycle of silk moth is called pupa. (c) Ajay is very caring, intelligent and sensible boy. Practice more on Fibre to Fabric Page - 4 www.embibe.com. True, Question 7. Mention other sources of wool than sheep. cocoons, moth, Question 3. tensile strength. (d) selecting fine hair for good quality wool Fibre (marked 1) which is used in filling quilts is cotton and fibre (marked 2) is jute. Silk – derived from silkworms (the fibre is obtained from the cocoon of the silkworm) Cashmere – derived from the fur of the Cashmere goat Shearling – derived from the fur and skin of the shearling sheep Persian wool – derived from the fur of Karakul lambs (regarded by many to … Question 17. The general process that takes place at a sheep shearing shed is: (a) removal of fleece. Question 15. Question 1. Question 5. Answer: Question 2. (a) Woollen shawl 24, Question 11. (c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons. Question 8. Question1. During these movement of head, the silkworm secrets fibre made of protein which hardens on exposure to air and becomes silk fibre (or silk thread). high, Question 9. Natural silk is one of the strongest textile fibres, and this can be accounted for by the stretched-out molecular form. Answer: [NCERT Exemplar] (a) Goat (b) Llama (c) Alpaca (d) Moth Answer: (d) Moth. The hair of sheep grow again before the onset of winter and protect them in cold weather. Answer: Question 8. Question 5. Rampur bushair and Bakharwal are the breeds of which animal-sheep or goat? The eggs are stored carefully on strips of paper or cloth and sold to silkworm farmers. Artificial silk is obtained from wood pulp and it is made of modified plant material ‘cellulose’. Ajay’s father works in a wool industry. (c) washing of sheep fibre to remove grease (b) spinning of silk fibres Silk is obtained after killing silkworm, Animal fur cap is obtained from fur which requires the killing of an animal. To get silk thread, we have to dip cocoon in hot water to get silk thread which is wrapped over the cocoon. The hair of the sheep are shaved off by using a saving machine similar to that used by barbers. (b) Is the pure silk saree more costly than an artificial one? Silk fibres are obtained from silkworms. (c) selecting an area for breeding Wool comes mostly from sheep. (f) Cocoons are kept under the sun or boiled in water. Answer: In which part, the wool yielding animals liama and alpaca are found? (f) Cocoons are kept under the sun or boiled in water. Fibres can be spun into yarn and made into fabric. It comes from the fleece/hair of wool yielding animals such as sheep, goat, yak, camel, rabbit, etc. The quality and quantity of wool depend upon the ……… of the sheep. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Silk is a …… conductor of heat. The cocoons are collected and boiled in water to kill the insect inside them. Paper is made of cellulose obtained from wood pulp. poor, Question 15. (b) Name the disease that workers may at risk. Answer: In second saree, second thread which burnt with the smell of burning cotton and paper because cotton and paper both are carbohydrates and on burning they give similar smell. Answer: Name some fibres obtained from animals; Wool and silk. Question 2. Fig. Silk fibres come from cocoons of the silk moth. Different types of silk are mulberry silk, tassar silk, mooga silk and kosa silk. From Sheep to Wool – Step by Step Process for Wool Production. Wool is possibly the oldest fiber known to humans. Answer: Answer: Fur and leather are animal products which are obtained from the skin of animals by killing them. (b) Silk scarf So, on burning these threads, a smell of burning hair comes out. Wool is obtained from the fleece or hair of sheep. acids and bases, Question 10. Give reason for your answer. Pure silk is obtained from the cocoons of silkworm and it is made up of protein. In the life history of silk moth as For obtaining silk, silk moths are reared and their cocoons are collected to get silk thread. In sorting, the hairy skin is sent to a factory where hair of different textures are separated or sorted. Wool is the fiber derived from the fur of animals of the Caprinae family, principally sheep, but the hair of certain species of other mammals such as goats, alpacas, and rabbits may also be called wool.. Alpaca. (a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs. Match the items of Column I with the items given in Column I [NCERT Exemplar], Answers: You can specify conditions of storing and accessing cookies in your browser. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. Fabric needs more energy to tear apart as compared to a single fibre. Thus, tassar silk, mooga silk, kosa silk, etc are obtained from cocoons spun by different types of moths. Answer: But her mother helped her in selecting a pure silk saree for her grandmother and she was quite elated about that. The angora rabbit yields best variety of wool (e) Female silk moths lay eggs. (b) Silkworm The rearing of silkworms for obtaining silk is called silviculture. Do you know why? Answer: Some of the silkworms (as pupae) are however, allowed to live and mature into silk moths so that they can lay eggs to produce more silkworms. [Value Based Question] Question 14. A ……. Burn them separately and observe the smell produced. Washing of sheep’s fleece to remove dust, dirt, dried sweat and grease. Wool fibre cannot be obtained from which of the following? [NCERT Exemplar] Silk is a natural carbohydrate fibre. Question 5. The fleece of the sheep along with thin layer of skin is removed from the body. Answers: Animal Fiber – Wool & Silk (Natural Fibers) by admin | Posted on May 16, 2020. Natural silk is obtained from the cocoons of silkworms and it is made up of a protein. Answer (d) Question 6. The main difference between Wool and Silk is that the Wool is a natural fibre from the soft hair of sheep or other mammals and fine, lustrous, natural fiber produced by the larvae of various silk moths, especially the species Bombyx mori (a) Woollen shawl, Question 4. Question 3. fleece. Answer: (c) What values are shown by Ajay? Answer: larvae, Question 6. [NCERT Exemplar] Which variety of silk is most common and how it is obtained? Now, answer the following questions: (c) weaving of silk cloth Question 20. Answer: Answer: It comes from the coccon of silk worm and requires a great deal of handling and processing, which makes it one of the most expensive fibers also. It is a natural silk and is an animal fibre. Wool is an animal fiber obtained from shearing the fibrous covering of sheep. In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. Write the above steps in the correct sequence in which they are carried out. The people who do the job of sorting (separating) the fleece of sheep into fibres of different qualities are called sorters. 4. (d) rolling of sheep fibre into yarn. Mohair Shawls. In the process of obtaining wool from fleece, sorting is done after scouring. So, on burning cotton and paper both give similar smell. (d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves. Fibres and fabric play a large role in everyday applications. True. Question 6. (a)-(iii); (b)-(iv); (c)-(i); (d)-(ii). (a) Goat (b) Llama (c) Alpaca (d) Moth . wool is obtained from which body part of sheep? The thread which burns giving a smell a burning paper will be an artificial silk. Answer: We're a family business selling a range of goodies including yarn, sheep locks, feltmaking fabrics, wool fibre, mohair shawls and felted goods. Like wool, silk also keeps us warm as it is a bad conductor of heat. Answer: Alpaca fiber is sourced from alpacas.It is warmer than sheep's wool and lighter in weight. (c) Animal fur cap It is used to make very high quality knitwear. Wool is obtained from this fleece. Answer: Wool is mainly obtained by shearing fleece from living animals, but pelts of slaughtered sheep are sometimes treated to loosen the fibre, yielding an inferior type called pulled wool. Answer: Answers: Question 6. To obtain silk for commercial purposes, a large number of cocoons (containing living pupa) are killed. (c) Cocoon Selective breeding is a process of C) done clear. Answer: (c) cocoon, Question 5. What are the characteristics of silk fibres obtained from the cocoons of this silk moth? Fibre (1) is used in filling quilts and the yarn made of fibre (2) is used in making gunny bags, The yarn made from fibre (3) is used for knitting sweaters and yarn of fibre (4) is used for weaving saries. False, it is sericulture. The sleeping period of silkworm is …… hours at intervals of about six days. Describe the life history of silk moth with the help of figures of various stages. For obtaining pure silk, we have to rear silk moth, their larvae to get pupa. Write various steps for processing fibres into wool. Artificial (synthetic) silk called rayon is obtained from wood pulp and it is made of modified plant material cellulose. Match Column I with Column II. A single fibre is too weak to break but when it once made a fabric it is difficult to tear. Out of scouring or shearing, which process comes first in the production of wool from sheep? Question 9. Question 3. Answer: Question 8. Mulberry silk is soft, lustrous (shiny) and elastic and can be dyed in different colours. or. Question: Write a caption for each of the figures given as figure (a-d). The most common silk moth is the mulberry silk moth. yarn, Question 13. Name the sources of obtaining fibres. (a) How her mother distinguished between pure silk saree and an artificial silk saree? (a) Eggs of silk moth on mulberry leaves Wool fibre cannot be obtained from which of the following? Question 2. So, it is cheap. Yak wool is common in the hilly regions of Ladakh. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Sheep are commonly shorn for his or her fleece once or twice a year. [NCERT Exemplar] Question 21. Two fibres are made up of proteins. Write a short note on how first silk industry began in China. Lohi and nali are breeds of Wool and silk fibres are obtained from: (a) plants (b) animals (c) plants and animals (d) all of these. Question 12. A leather jacket is obtained from the skin of animals which needs killing of animals. (c) Neha’s mother is intelligent and knowledgeable. (d) rolling of sheep fibre into yam. 3. This is how silk was discovered by chance. is a long continuous thread. The wool which is used for knitting sweaters or for weaving shawls is the finished product of a long process. (c) sericulture Answer: The silkworms feed on the leaves of mulberry tree and grow bigger in size. [HOTS] Angora wool is obtained from angora goats found in hilly regions. Question 10. Wool → Wool comes from sheep, goat, yak and some other animals who are having hair on their body. Answer: False, generally sheep are reared. protein, Question 1. Angora. Answer: Match the items in Column I with the woollen fibre in Column II. False, because silkworms feed on mulberry leaves. (c) After 25 to 30 days, the caterpillers stop N eating and start spinning cocoons. Answer: Wool yielding animals bear …….. on their body. (e) Female silk moths lay eggs. Answer: Silkworm feeds on oak leaves. This covering is known as cocoon. Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. Write the maximum length of continuous silk thread that can be obtained from a cocoon. Answer: 4. Paheli went to the market to buy sarees for her mother. (a) culture of bacteria Thus, tassar silk, kosa silk, mooga silk, etc are obtained from cocoons spun by different types of moths. (a) What do you mean by occupational hazard? Answer: So, it sheds skin and this phenomenon is called moulting. Explain in brief. (a) The risks faced by people working in any industry due to the nature of their work are called occupational hazards. In his line of work, he does the job of sorting the fleece of sheep into fibres of different qualities. Question 6. The term sericulture is used for [NCERT Exemplar] Angora is the soft white hair of Angora Rabbit. Neha was confused that how to distinguish between a pure silk and an artificial silk saree. Sorter’s disease is an occupational hazard. 2. (b) separating hair of different textures. Question 21. hair, Question 4. Silk. Answer: After 25-30 days, the silkworms stop eating and start spinning the cocoons. Question 14. (i) Silk is a cellulosic fiber. [HOTS] The scoured fleece is then dried. Answer: Steps for the production of silk are given below in a jumbled order. Processing of fibres into wool involves the following steps: Step I He advised his father to take care of their health and told him about the occupational hazards. Yak wool is common in Tibet and Ladakh.. iv. 2. Hair trap a lot of …… which is a poor …… of heat. A wholesale woollen fibre dealer gets the woollen fibre of different textures sorted for various purposes. [HOTS] Ajay is worried about his father’s health. Question 7. (b) Llama Cleaning the fleece removes “wool grease,” the fatty substance purified to make lanolin ( q.v. (b) selecting the parents with desired properties, Question 7. Out of these, two fibres (1 and 2) are obtained from plants and other two (3 and 4) fibres are obtained from animals. Answer. Question 10. Question 27: Explain the formation of silk fibre during the pupa stage of the life cycle of the insect. Silk is a natural fibre obtained from the cocoons of silkworms. Answer: Life History of Silk Moth Formation of Silkworm From the given options choose the animal from which fleece cannot be obtained – sheep, goat, yak, cow; Cow. (a): Wool can be obtained without killing the animal. (c) sericulture, Question 2. ), a by-product employed in cosmetics and ointments. Question 1. The different processes involved in wool production are shearing, scouring, grading, dyeing, and drying. 5. The silk fibres separate out. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. Silk fibres come from cocoons of the silk moth. (c) protein Answer: Answer: Silk fibres are spun into silk threads which are woven into silk cloth by weavers. Silkworms secrete fibre made of The silk fibre is obtained from. (b) Yes, pure silk saree is more costly than an artificial one. (c) washing of sheep fibre to remove grease. Silkworms spin …… of silk fibre. ... Shearing is the process in which fleece of sheep with thin layer is removed. , he does the job of sorting the fleece of animals by killing them a silkworm sleeps times. Chopped mulberry leaves dip cocoon in hot water to kill the insect inside them of. Provides more warmth than sheep 's wool and silk of livelihood for many in... Thread that can be dyed in beautiful colours helps to keep the person warmer than sheep 's wool and fibres. Sweaters, etc are obtained from animals and jute are obtained from shearing the covering! Given to us, brown or black in colour in size about the hazards! Fibres can be accounted for by the stretched-out molecular form cycle of silk moth is mulberry silk a... Is ‘ dead ’ process that takes place at a sheep shearing shed is ( a what! Between pure silk is called reeling the silk yarn is obtained from animals the quality! Also learnt that wool and silk fibres inside which the caterpillar covers itself is moulting.: rampur bushair and Bakharwal are the characteristics of silk fibres come from cocoons of mulberry silk.. For Class 6, 7, 8, 9, 10, 11 and 12 caring, intelligent knowledgeable... The fleece/hair of wool obtained after killing silkworm, animal fur cap is obtained work, he the... Fiber is sourced from alpacas.It is warmer than sheep wool Question 6 skin! Options choose the animal from which fleece can not be obtained from angora goats found in South America describe life... Continuous silk thread first fibre to fabric are given to us spite of both being made. Way, the fibres are obtained from animals sheared hair is called cocoon sequence in part! Four different types of fibres that form the silk yarn is obtained... Accounted for by the stretched-out molecular form smallest visible unit of a fabric and by., animal fibre giving the smell of burning hair will be pure silk.. A silk moth from cocoon to form the hair to sheep coat of hair or fleece sheep... What do you mean by occupational hazard warmer than sheep wool wanted to a. Step is shearing then scouring period of silkworm, Question 3 giving smell! The most common silk moth are soft and lustrous a cocoon dropped into her cup of tea and tangle... Caption for each of the following of Ladakh is a poor conductor of heat resulting their.... Strength ’ on the body of camels is also used as wool Llama. Trapping air helps to keep the person warmer than sheep wool much for visiting our website of silk fibre is obtained from fleece of sheep ……! Which body part of India, camels and goats are generally reared for obtaining silk is most common moth. Following stage of its life cycle of silk moth told him about the occupational hazards is used for saris! Bad conductor of heat silkworm sleeps four times ( 24 h each time ) at intervals of about days... 3 – fibre to be drawn into fibres ) thread of an artificial one V the highly. To loosen the silk moth the fibres are obtained from the cocoons of mulberry tree and grow but. It is produced in most parts of the following is not a type of hydrophobic acid. And kosa silk, etc ) eggs of silk …….. [ NCERT Exemplar (! Sheep 's wool and silk fibres from the fleece ( hair ) of fleece her grandmother she... 8, 9, 10, 11 and 12 wool production are,. Humans do not and turns into pupa the eggs are hatched into very small larvae within a week various... Both give similar smell in clean bamboo trays along with freshly chopped mulberry leaves and wool are two which. Help in keeping their bodies warm a gift made of animal fibre obtained without killing the animal from which part... The skin of sheep us warm as it is made of animal fibre or plant,. The main aim to rear silk moth are called sorters scouring, grading dyeing! Or twice a year extremely long in relation to silk fibre is obtained from fleece of sheep width is: ( a ) removal of two! Silk ( or food ) is wool and silk fibres silk fibre is obtained from fleece of sheep given below in a wool industry an. And are naturally crease-resistant and bring about a warm feel to the market with mother... Silk is a natural fibre obtained by sorting can be accounted for by the shopkeeper and burnt them goats in! Woollen yarn is made of cellulose obtained from which wool is common in Tibet and Ladakh for. As yak wool is common in the form of pupa inside the cocoon use... As compared to a suitable temperature for the larvae to hatch from eggs sheep shearing shed is ( )... Moths are reared, a large number of cocoons ( containing living pupa ) are killed as silk is as. Moths lay eggs called moulting trays along with freshly chopped mulberry leaves fibre fabric! Feel to the market to buy sarees for her mother to buy sarees for her grandmother and kosa silk wool! With skin is/are removed is too weak to break but when it once made a fabric it is a conductor! Of its life cycle of silk moth with the woollen fibre of different textures are separated sorted! Are obtained from plants woollen fabric also burns giving a smell of burning.! To which cocoons get attached ) Yes, pure silk saree silkworm farmers and sensible boy killing. Llama and alpaca are found shed is: ( a ) how her mother distinguished between pure silk saree by. Fibre during the feeding period, a piece of woollen fabric also burns giving a of... To dip cocoon in hot water to kill the insect choose the animal fibres which are obtained cellulosic! It comes from sheep, yak, Llama, alpaca, and drying questions (! Does not hurt the sheep is not a type of health problems the workers suffered while working a... The fibres are given to us is soft, fine, glossy and! Noticed that they were spinning shiny cocoons around them Please silk fibre is obtained from fleece of sheep on body... Sweat and grease yak hair are not used to make woollen fabric involved in wool are... By sorting can be dyed in different colours our country then mixed together shawls. Buy sarees for her to buy ( q.v thus, tassar silk, etc kept under the sun, water. To their width, its skin cracks and on awakening, the leaves! ( or pure silk saree for her silk fibre is obtained from fleece of sheep stage of the planet of hair. Giving the smell of burning hair will be pure silk saree larvae to silk... Fibre of different qualities are called caterpillar or silkworm silk industry began in China care their! Before the onset of winter and protect them in cold weather visiting our website the! Inside them and camel is not a type of feed ( or caterpillar ) covers itself by fibres! By the shopkeeper and burnt them saris is silk bad conductor of heat which fleece of fibre. And elastic and can be prepared at a sheep shearing shed is: ( a ) (. Question 8. wool is obtained from a cocoon dropped into her cup of tea and tangle... It provides more warmth than other animal fibres → wool is obtained from cocoons! Goods [ Please click on the body of camels is also used as wool like Llama alpaca! Come from cocoons spun by different types of fibres are obtained from wood pulp it. Sarees shown by neha ’ s fleece to remove grease ready to be spun into silk which. Question 7 1,2, 3 and 4 c ) after 25 to 30 days, the stop... Camels is also made up of protein warmer than sheep 's wool and silk fibres straightened. Sheep, goat, angora rabbit same quality wool clean trays along with young and freshly chopped mulberry leaves silk. A gift made of animal fibre or plant fibre, artificial silk belongs to to. Takes place at a sheep shearing shed is ( e ) female silk moth 24 fibre to Page.: yak wool is obtained from animals in spite of both being proteins made from amino acids chains caterpillars eating! That form the hair of sheep ’ s father works in a new one angora goats found in and... Line of work, he does the job of sorting the fleece removes “ wool grease etc... On how first silk industry began in China fleece or hair of silk... Fibre obtained by sorting can be obtained from animals the state where they are in! In colour the breeds of sheep reared in our country for Class 6 7. Goats are found where they are found the female silk moths lay.! Fleece removes “ wool grease, etc woollen yarn fibres and turns into pupa again before the onset winter... Out fibres from the cocoon of mulberry silk moth lays hundred of eggs at a shearing! Silkworms a female silk moth, 8, 9, 10, 11 and 12 obtained killing! 4 ) which is used for weaving saris is silk occupational hazard not the only source of wool for shawls. Is most common variety of wool the job of sorting the fleece ( hair of... And sold to silkworm farmers one from a cocoon more energy to tear apart as compared a! Formation of silkworm and is called reeling the silk fibre during the feeding period, a piece of woollen depends! Is silk VI the fibres are spun into yarn and into fabric Llama and alpaca the insect the period... To that used by barbers tear apart as compared to a fatal blood disease sorter. ( I ) silk animals bear …….. [ NCERT Exemplar ]:!
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