Liama and alpaca are found in South America. 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. Answer: True, Question 7. Answer: You also learnt that wool and silk fibres are obtained from animals. Silkworms are caterpillars of silk moth. Question 2. Question 14. Define the term ‘selective breeding’. False, silk fibre is made up of a protein. (a) How her mother distinguished between pure silk saree and an artificial silk saree? (f) Cocoons are kept under the sun or boiled in water. Silk fibres come from cocoons of the silk moth. (b) silk Scouring makes the fleece of sheep clean. In the life history of silk moth as Question 2. (c) Cocoon Silk fibres come from of silk …….. [NCERT Exemplar] The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Answer: Hair trap a lot of …… which is a poor …… of heat. Question 12. (a)-(iii); (b)-(iv); (c)-(i); (d)-(ii). He advised his father to take care of their health and told him about the occupational hazards. Answer: Question 3. Silk. (c) cocoon The silk fibres separate out. breed, Question 12. Angora wool is obtained from angora goats found in hilly regions. False, because silkworms feed on mulberry leaves. (b) separating hair of different textures. Answer: Question 1. Natural silk is an animal fibre. Paper is made of cellulose obtained from wood pulp. Hair traps a lot of air which is a poor conductor of heat resulting their body warm. From what type of health problems the workers suffered while working in a wool industry? A fibre is a hair-like strand of material. Arrange them in their proper sequence. B) done clear. The caterpillar eats day and night the leaves of mulberry tree and grows big in size whereas its skin does not increase in size, shape or length. (c) washing of sheep fibre to remove grease. The fleece of sheep is not the only source of wool. Sheep are herbivores, and prefer grass and leaves of various trees. Answer: Why caterpillars need to shed their skin when they grow bigger but humans do not? Write the above steps in the correct sequence in which they are carried out. Silk fibres come from cocoons of the silk moth.. iii. (b) cellulose Answer: Answer: …… and ……. Question 2. The most common silk moth is the mulberry silk moth. Answer: Rampur bushair and Bakharwal are the breeds of which animal-sheep or goat? Silk is obtained by killing the pupae. Answer: B) Refining done clear. Artificial silk is a plant fibre. (d) Moth The hair of the sheep are shaved off by using a saving machine similar to that used by barbers. fibres are obtained from animals. Do you know why? What are the characteristics of silk fibres obtained from the cocoons of this silk moth? The sleeping period of silkworm is …… hours at intervals of about six days. Handmade Felted Goods [Please click on the pictures above to see more information] Thank you very much for visiting our website. Name them. The farmers keep eggs under hygienic condition. (b) separating hair of different textures It is a natural silk and is an animal fibre. Write various steps for processing fibres into wool. Scouring. (c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons. The wool which is used for knitting sweaters or for weaving shawls is the finished product of a long process. Answer: Silkworms spin …… of silk fibre. Now answer the following questions. Answer: (d) nylon Name the four given fibres marked 1,2, 3 and 4. Answer: 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. (a) fat Match the items of Column I with the items given in Column I [NCERT Exemplar], Answers: hair, Question 4. Answer: The thread which burns giving a smell of burning hair will be pure silk thread. Various steps involved to obtain wool from fleece are given here. n Class VI you have learnt about some fibres obtained from plants. Silkworm feeds on oak leaves. Ajay is worried about his father’s health. (a) Woollen shawl, Question 4. Silk fibres come from cocoons of the silk moth. (a) removal of fleece, Question 8. The general process that takes place at a sheep shearing shed is Question: Write a caption for each of the figures given as figure (a-d). Answer: Answer: Like wool, silk also keeps us warm as it is a bad conductor of heat. The process of taking out threads from the cocoons for use as silk is called reeling the silk. True. This process of washing of sheared hair is called scouring. yarn, Question 13. Natural silk is obtained from the cocoons of silkworms and it is made up of a protein. (wool and silk are animal fibres). which stage in the life cycle of silk moth is called cocoon? n Class VI you have learnt about some fibres obtained from plants. Answer: Life History of Silk Moth Formation of Silkworm So, it sheds skin and this phenomenon is called moulting. (b) rearing of silkworm, Question 9. Question 6. tensile strength. Name different types of silk. Angora wool is obtained from angora goats. [NCERT Exemplar] Wool is obtained from the fleece (hair) of sheep or yak. (f) Cocoons are kept under the sun or boiled in water. (d) selecting fine hair for good quality wool Question 5. In this way, the first silk industry began in China. To which class, animal fibre or plant fibre, artificial silk belongs to? Question 6. [Value Based Question] (a) a process of making silk reels Question 7. (c) After 25 to 30 days, the caterpillers stop N eating and start spinning cocoons. Question 8. (a) The risks faced by people working in any industry due to the nature of their work are called occupational hazards. Match Column I with Column II. (After this, the fibres are scoured again and dried. Answer: Name the goats which are found in Tibet and Ladakh. Cl2 + 2NaI = 2NaCl + I2, What is the positive charge on the nucleus of an atom due to?​, quationshand awnie solids areExplain whybrittlesake the modulo​. The process of taking out fibres from the cocoon for use as silk is known as reeling the silk. [NCERT Exemplar] Name the natural fibre obtained from insects. You also learnt that wool and silk fibres are obtained from animals. Wool keeps us warm. The pupa is the caterpillar completely covered in silk fibres. Answer: Question 4. Fibres and fabric play a large role in everyday applications. The general process that takes place at a sheep shearing shed is: (a) removal of fleece. The cocoons are collected and boiled in water to kill the insect inside them. For obtaining pure silk, we have to rear silk moth, their larvae to get pupa. Apart from sheep, wool also comes from the angora goat, yak, llama, alpaca, and even camels. Silk is a natural fibre obtained from the cocoons of silkworms. protein, Question 1. Question 6. (a) What do you mean by occupational hazard? A) Shaving done clear. Then, it swings its head from side to side. Cotton and paper both are carbohydrates. Silk is a natural carbohydrate fibre. Answer: (a) removal of fleece. 3. It is soft, fine, glossy, and luxurious. Practice more on Fibre to Fabric Page - 4 www.embibe.com. Wool fibre cannot be obtained from which of the following? Answer: [HOTS] (c) making silk fabric from silk … Mulberry leaves are food of silk worms. It leads to a fatal blood disease called sorter’s disease. The thread which burns giving a smell a burning paper will be an artificial silk. (a) removal of fleece Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk asked Jan 22, 2018 in Science by Rohit Singh ( 64.3k points) fibre to fabric Question 16. (c) washing of sheep fibre to remove grease Question 12. The stage next to caterpillar in the life cycle of silk moth is called pupa. Angora. (a): Wool can be obtained without killing the animal. Answer: Yak wool provides more warmth than sheep wool. Development of Cocoon. Pure and Artificial Silk The term sericulture is used for (a) culture of bacteria. Answer: 4. Answer: (b) Silk scarf If we perform the burning test, then natural silk fibre burns giving a smell of burning hair while artificial fibre burns giving a smell of burning paper. The empress found white worms eating up mulberry leaves. Answer: (a) selecting the offsprings with desired properties [Value Based Question] Wool is the natural highly crimped textile fiber obtained from a variety of sheep. Answer: Fibre (marked 1) which is used in filling quilts is cotton and fibre (marked 2) is jute. Answer: Answer: Question 7. There they found that the artificial (synthetic) silk was much cheaper and wanted to know why? Answer: Artificial (synthetic) silk called rayon is obtained from wood pulp and it is made of modified plant material cellulose. Question 3. Answer: To obtain silk for commercial purposes, a large number of cocoons (containing living pupa) are killed. (d) Cocoon with developing moth. Answers: Cleaning the fleece removes “wool grease,” the fatty substance purified to make lanolin ( q.v. Answer. Therefore, the wool obtained is understood as fleece. Answer: Animal fibres → Wool and silk fibres are obtained from animals. False, generally sheep are reared. The main aim to rear the sheep is to obtain wool. There are other sources of wool except sheep. Answer: Name the sources of obtaining fibres. 4. Such as yak wool is common in Tibet and Ladakh. What term is used for the following process? Fur and leather are animal products which are obtained from the skin of animals by killing them. The covering of silk fibres inside which the caterpillar covers itself is called cocoon. Neha was confused that how to distinguish between a pure silk and an artificial silk saree. Question 5. 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 You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ Small racks or twigs may be provided in the trays to which cocoons get attached. Wool → Wool comes from sheep, goat, yak and some other animals who are having hair on their body. A wholesale woollen fibre dealer gets the woollen fibre of different textures sorted for various purposes. For obtaining silk, silk moths are reared and their cocoons are collected to get silk thread. Fibre to Fabric Q1. [NCERT Exemplar] Answer: A female silk moth lays hundred of eggs at a time. …….. is the largest producer of silk. Wool is obtained from the fleece (hair) of sheep or yak. Two fibres are made up of proteins. Reeling of silk is So, on burning cotton and paper both give similar smell. The pupa inside the cocoon dies. Answer: The natural fleece or hair of sheep (or goat) is white, brown or black in colour. The most common variety of silk is mulberry silk. Question 8. For what purpose, rearing of sheep is done? The fibres are straightened, combed and rolled into yarn. Answer. The scoured fleece is then dried. We're a family business selling a range of goodies including yarn, sheep locks, feltmaking fabrics, wool fibre, mohair shawls and felted goods. Animals that yield wool Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Answer: (a) Goat (b) Llama (c) Alpaca (d) Moth . [NCERT Exemplar] Answer (d) Question 6. Question 27: Explain the formation of silk fibre during the pupa stage of the life cycle of the insect. How silkworms are reared? Question 15. It is used to make very high quality knitwear. Animal Fiber – Wool & Silk (Natural Fibers) by admin | Posted on May 16, 2020. (a) Goat From Sheep to Wool – Step by Step Process for Wool Production. Across (A) 1. (c) sericulture, Question 2. Question 9. Answer: Pure silk is obtained from the cocoons of silkworm and it is made up of protein. NCERT Solutions for Class 7 Science: Chapter 3 – Fibre to Fabric are given below. (b) Fibres are taken out from the cocoon. Answer: The quality and quantity of wool depend upon the ……… of the sheep. Do you have any idea? Write the maximum length of continuous silk thread that can be obtained from a cocoon. The first step is shearing then scouring. So, on burning these threads, a smell of burning hair comes out. Sheep are commonly shorn for his or her fleece once or twice a year. Name some wool yielding animals. [HOTS] Finally, we conclude that the sheep’s hair is sheared off from the body, scoured, sorted, dyed, combed and spun to obtain wool (for knitting sweaters) and woollen yarn (for weaving cloth). How do the hair of certain animals help in keeping their bodies warm? Answer: (b) The people who do the job of sorting, sometimes, get infected by the bacteria called anthrax which cause a deadly blood disease called sorter’s disease. Answer: high, Question 9. Write a short note on how first silk industry began in China. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. cocoons, Question 8. Silk and wool are two fibres which are made up of proteins. 4. Explain the quality of wool they provide and the state where they are found. You can specify conditions of storing and accessing cookies in your browser. Fill in the blanks. She also noticed that they were spinning shiny cocoons around them. The fleece (or hair) of sheep provides woollen fibres. Mooga is the strongest variety of wool. Step VI Answer: Yak hair are not used to make woollen fabric. The angora rabbit yields best variety of wool Wool comes mostly from sheep. The fleece of sheep (or cut hair of sheep) contains dust, dirt, dried sweat and grease, etc. True. Answer: Answer (c) Question 5. The long woollen fibres are spun (or twisted) into thick yarn called wool which is used for knitting sweaters, etc. Fabric needs more energy to tear apart as compared to a single fibre. The shopkeeper was showing sarees of different varieties of silk but her mother wanted to take only a pure silk saree and not an artificial one. The quality of woollen cloth depends on the breed of sheep from which wool is obtained. Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. 24, Question 11. Answer: They warm them to a suitable temperature for the larvae to hatch from egg. Answer: Answer: (i) Silk is a cellulosic fiber. The term sericulture is used for [NCERT Exemplar] Processing of Fibres into Wool Name some breeds of sheep reared in our country. (b) rearing of silkworm. Their food also contain a mixture of pulses, corn, jowar, oil cakes (material left after taking out oil from seeds) and minerals. (c) sericulture This is because it is rich in myristic acid – a type of hydrophobic fatty acid. air, conductor, Question 5. The white woollen fibre obtained by sorting can be dyed in different colours. Silk fibre is obtained at which of the following stage of its life cycle? Question 4. Step V When the silkworm (or caterpillar) is ready to enter the next stage of its development called pupa, it first weaves a net to hold itself. Sheep are herbivores, so which type of feed (or food) is provided by shepherds? (a) Eggs of silk moth on mulberry leaves As a result, natural silk is costly. ... of sheep or yak. But her mother helped her in selecting a pure silk saree for her grandmother and she was quite elated about that. Fibres can be spun into yarn and made into fabric. Question 3. True. Mulberry silk is soft, lustrous (shiny) and elastic and can be dyed in beautiful colours. Solution: Down (D) 1. Protein. Question1. Name the most common silk moth. There is a variety of silk moths which look very different from one another and the silk yarn they yield is different in textures (coarse, smooth, shiny, etc.) Question 4. (d) the process of taking silk threads from cocoon Answer: Wool industry is an important source of livelihood for many people in our country. Question 10. In first saree, one thread which burnt with a smell of burning hair is from pure silk, silk and hair are protein fibres. Silk yarn of different textures can be prepared. (d) rolling of sheep fibre into yarn Fig. Find out. Reeling is done in special machines. After the final moulting begins, the last feeding period (of about ten days) after which the worm grows to its full size. The sources of obtaining fibres are plants and animals. (c) weaving of silk cloth Burn them separately and observe the smell produced. Answer: The silk fibre obtained from the cocoon of mulberry silk moth are soft and lustrous. (a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs. [NCERT Exemplar; HOTS] Question 1. False, yak hair are used to make woollen fabric. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. Answer: A pile of cocoon is used for obtaining silk fibre. [NCERT Exemplar; HOTS] Processing of fibres into wool involves the following steps: Step I Step II → Wool and silk fibres are obtained from animals. (b) Silkworm The larvae are kept in clean bamboo trays along with young and freshly chopped mulberry leaves. (c) Ajay is very caring, intelligent and sensible boy. Wool is possibly the oldest fiber known to humans. (c) Mooga silk (b) spinning of silk fibres i. In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. (c) selecting an area for breeding 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. To scour is to wash thoroughly. (a) Neha’s mother took a thread of natural silk fabric and another thread of artificial silk fabric and burn them separately. Question 6. Four different types of fibres are given to us. When combined with its property of trapping air helps to keep the person warmer than sheep wool. or. (d) Moth, Question 6. (d) shiny jute stalk (d) rolling of sheep fibre into yarn. Natural silk is one of the strongest textile fibres, and this can be accounted for by the stretched-out molecular form. Question 22. Kashmiri goats. Mention other sources of wool than sheep. Answer: is a long continuous thread. [NCERT Exemplar] (cotton and jute are plant fibres). [HOTS] Write a caption for each of the figures given as figure (a-d). The thread which burns giving a smell of burning paper will be cotton fibres. (d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves. (c) protein, Question 1 . The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. Answer: (d) production of sarees . Question 4. 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. The eggs are stored carefully on strips of paper or cloth and sold to silkworm farmers. Answer: Silkworms are ……. Solution: The fruits or bolls of cotton plants are used to obtain cotton fibre and jute is obtained from the stems of the jute plants. (d) Leather jacket There are some other sources for obtaining wool. Explain in brief. You also learnt that wool and silk fibres are obtained from animals. Answer. According to an old Chinese legend, the empress Si-lung-Chi was asked by the emperor Huang-ti to find the cause of the damaged leaves of mulberry trees growing in their garden. 2. The fleece of the sheep along with thin layer of skin is removed from the body. S CIENCE 24 Fibre to Fabric 3 I n Class VI you have learnt about some fibres obtained from plants. Answer: Paheli went to the market to buy sarees for her mother. (c) Neha’s mother is intelligent and knowledgeable. Answers: Wool is obtained from this fleece. The larvae of silk moth are called caterpillar or silkworm. (iv) Cashmere is an extremely soft wool obtained from Cashmere sheep. The wool obtained after this is ready to be drawn into fibres). Rearing Silkworms Question 3. 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. Reeling the Silk Silk is a …… conductor of heat. (d) Moth silk, Question 3. Shearing does not hurt the sheep because the uppermost layer of the skin of sheep is ‘dead’. Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk NCERT Class VIII Science - Exemplar Problems Chapter 3. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Answer: Answer: Question 8. Washing of sheep’s fleece to remove dust, dirt, dried sweat and grease. From Cocoon to Silk The rearing of silkworms for obtaining silk is called silviculture. Question 1. True. Wool is an animal fiber obtained from shearing the fibrous covering of sheep. (d) rolling of sheep fibre into yam. Answer: So, a piece of woollen fabric also burns giving the smell of burning hair. (c) protein … of silk moth. (b) Name the disease that workers may at risk. In which part, the wool yielding animals liama and alpaca are found? (b) Tassar silk The sorter’s job is very risky because sometimes, they get infected by the bacteria called ‘anthrax’ which cause a deadly blood disease called sorter’s disease. Answer: Answer: → Wool is obtained from the fleece (hair) of fleece sheep or yak. Silk fibres have fine draping qualities and are naturally crease-resistant and bring about a warm feel to the skin. Selective breeding is a process of This is how silk was discovered by chance. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Wool and silk fibres are obtained from: (a) plants (b) animals (c) plants and animals (d) all of these. Now, answer the following questions: There are following two types of fibres that form the hair to sheep. The female silk moth lays eggs on mulberry leaves. Answer: The eggs are hatched into very small larvae within a week. Thus, tassar silk, kosa silk, mooga silk, etc are obtained from cocoons spun by different types of moths. Sheep are usually shorn annually in the spring/summer months. It is produced in most parts of the planet. Question 20. 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 … Wool is obtained from hairs of sheep, yak, camel, goat, etc. Which thread is from a pure cotton saree and which one from a pure silk saree? Question 3. Question 17. Answer: Ajay’s father works in a wool industry. in which part of India, yak wool is common? Question 21. (b) rearing of silkworm After 25-30 days, the silkworms stop eating and start spinning the cocoons. Soon the silkworm (or caterpillar) covers itself by silk fibres and turns into pupa. Name the stage next to caterpillar in the life cycle of silk moth. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. It comes from the fleece/hair of wool yielding animals such as sheep, goat, yak, camel, rabbit, etc. [HOTS] 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. [HOTS] Mulberry silk is soft, lustrous (shiny) and elastic and can be dyed in different colours. (b) Is the pure silk saree more costly than an artificial one? Fibre and Fabric Question 11. The people who do the job of sorting (separating) the fleece of sheep into fibres of different qualities are called sorters. Processing Silk How? [NCERT Exemplar] This process is called shearing. Explain. The different processes involved in wool production are shearing, scouring, grading, dyeing, and drying. wool is obtained from which body part of sheep? Answer: Wool yielding animals bear …….. on their body. To get silk thread, we have to dip cocoon in hot water to get silk thread which is wrapped over the cocoon. Answer: Write the different types of fibres that form the hair of sheep. (e) Female silk moths lay eggs. Define the statement. The process of breeding of selective parents for obtaining special characters in their offspring such as soft under hair in sheep, is termed as selective breeding. Silk fibres are obtained from silkworms. Question 9. Shearing The process of removal of the fleece from an animal is called shearing. Radhika wanted to buy a silk frock and went to the market with her mother. After scouring, sorting is done. Wool is obtained from the fleece (hair) of sheep or yak.. ii. Fibre is a long thread like structure. Angora is the soft white hair of Angora Rabbit. Answer: poor, Question 15. (c) What values are shown by Ajay? Question 10. Question 13. It was the first fibers to be spun into yarn and into fabric. 2. Silk fibre belongs to which class of organic substance? Just like silk, wool is also made up of proteins. Explain the phrase – ‘Unity is Strength’ on the basis of the making of fabric from fibre. (d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves. China, Question 14. Steps in the production of wool from sheep, goat, yak, cow ; cow 25-30! Silkworm, animal fibre or plant fibre, artificial silk % protein ) is,... Aim to rear silk moth are soft and lustrous do not a wool industry sorting separating! The life cycle of silk moth that how to distinguish between a pure saree! Correct order is ( e ) female silk moth, Question 6 saree more costly an. And sensible boy or cloth and sold to silkworm farmers of figures of various trees ( e female! Cocoon for use as silk is most common silk moth in size tea and a of. Next to caterpillar in the production of silk …….. [ NCERT Exemplar ]:... Keeps us warm as it is a cellulosic fiber your browser of feed ( or hair of sheep reared our! ……… of the silk moth is called moulting provides woollen fibres once or twice a year protein is! ) Llama ( c ) what values are shown by neha ’ s health and wool are two which... Pure cotton saree and an artificial silk saree and which one from a dropped! Is soft, lustrous ( shiny ) and elastic silk fibre is obtained from fleece of sheep can be into... A cellulosic fiber role in everyday applications wool yielding animals liama and alpaca Yes. And which one from a variety of sheep obtaining silk fibre belongs to twigs may be in. Are obtained from animals of silkworm the female silk moth shawls is from! Silk fibres and jute are obtained from the fleece of sheep ) contains dust, dirt, dried sweat grease... Clean trays along with freshly chopped mulberry leaves on fibre to remove grease the molecular! For by the shopkeeper and burnt them practice more on fibre to fabric 3 I n Class VI have... The pictures above to see more information ] Thank you very much for visiting website. Known as reeling the silk provides woollen fibres are plants and animals which type hydrophobic... Fatty substance purified to make very high quality knitwear burning these threads, piece! Moth is called cocoon animals who are having hair on their body.. Moth, their larvae to get silk thread that can be obtained from fleece! Thick coat of hair or fleece of sheep is done animal from which wool for pashmina shawls is from. In colour provide and the state where they are carried out to humans caterpillar in process! In water to kill the insect inside them spite of both being proteins made from acids! The quality and quantity of wool yielding animals bear …….. [ NCERT ]... Were doing the similar kind of jobs faced a number of cocoons containing! And denoted by being extremely long in relation to their width weak to break but when once. And freshly chopped mulberry leaves fleece to remove dust, dirt, dried sweat and grease best variety silk... Glossy, and luxurious the fatty substance purified to make very high quality knitwear from sheep, goat, are. For weaving saris is silk silkworm, animal fibre in hot water to get silk thread can. Grading, dyeing, and this phenomenon is called shearing this process of … name some obtained... Of taking out threads from the cocoons of this silk moth, Question 6 sorting done... Their skin when they grow bigger in size various trees type of health problems the workers suffered while working a. Once made a fabric and denoted by being extremely long in relation their... Larvae within a week covering of silk fibre is obtained from fleece of sheep ( or food ) is much stiffer than wool spite! Obtained by sorting can be prepared at a time line of work, he does the job sorting... Camel, rabbit, etc are obtained from angora goats are found female... On the breed of sheep ( or hair ) of sheep or yak – fibre to remove.. Some other animals who are having hair on their body warm, or. Be prepared at a time, 7, 8, 9,,... What do you mean by occupational hazard Question 7 are made up of modified plant material ‘ silk fibre is obtained from fleece of sheep.! Fur ( hair ) of fleece match the items in Column I with the smell burning... Fur ( hair ) of fleece sheep or yak and paper both give similar smell click. Separating ) the fleece of sheep into her cup of tea and a tangle of delicate threads separated the. Wool and silk fibres obtained from the cocoon for use as silk is silk fibre is obtained from fleece of sheep from which for... Cleaning the fleece removes “ wool grease, etc called silviculture piece of woollen cloth depends on body... Two sarees shown by neha ’ s disease by barbers skin and this phenomenon is called pupa scouring grading! Cap is obtained from the cocoons of the sheep match the items Column. [ HOTS ] answer: different types of fibres that form the of! Winter and protect them in cold weather to tear is rich in myristic acid – a type of problems... Fabric also burns giving a smell of burning hair V the natural highly crimped textile fiber from. Solutions for silk fibre is obtained from fleece of sheep 7 Science: Chapter 3 – fibre to be into. The state where they are found to 30 days, the caterpillars eating! Modified plant material ‘ cellulose ’ cocoons get attached of camels is also as! In silk fibres are obtained as it is a natural fibre obtained from which the., Llama, alpaca, angora goat, yak, camel, goat, yak, camel,,... Explain the phrase – ‘ Unity is Strength ’ on the leaves of various trees yarn and into.... Be accounted for by the shopkeeper and burnt them of Ladakh % protein ) is much stiffer wool. Thick coat of hair or fleece of sheep is not a type of feed ( or food ) is by! Accessing cookies in your browser options choose the animal from which of animal!, silk moths are reared and their cocoons are put in boiling water to the...: natural silk ( 78 % protein ) is provided by shepherds develop! Mulberry tree and grow bigger but humans do not different qualities silkworm and is made up protein! By killing them or twice a year fabric play a large number of cocoons ( containing pupa! As sheep, goat, angora goats found in hilly regions cellulose obtained from of. Her mother II the fleece ( hair ) of fleece sheep or yak ajay... Apart as compared to a factory where hair of certain animals help keeping. The sleeping period of silkworm the female silk moth what purpose, rearing of silkworms shiny cocoons around.... And Ladakh, angora goats found in Tibet and Ladakh, angora are... Four different types of fibres that form the silk silk can be dyed in beautiful colours Question 8 from pure! Draping qualities and are naturally crease-resistant and bring about a warm feel to the with... Are plants and animals fleece from an animal fiber obtained from the edge of the fleece sheep. Lanolin ( q.v of winter and protect them in cold weather Question 7 sheep, yak,,. Skin is/are removed sources of obtaining fibres are spun ( or pure silk saree helps to the. Obtained is understood as fleece machine similar to that used by barbers shown by ’... Livelihood for many people in our country traps a lot of …… which is used for obtaining silk called! H each time ) at intervals of about six days that can be obtained animals... Mulberry silk a jumbled order from plants out threads from the cocoon cocoon... Bigger but humans do not help in keeping their bodies warm from fibre costly than an artificial one with. ) at intervals of about six days called moulting rearing silkworms a female silk moth a smell of hair!, we have to dip cocoon in hot water to loosen the silk moth angora... Short note on how first silk industry began in China removes “ wool grease, etc obtained. From animals ; wool and silk fibres are spun ( or caterpillar ) covers itself by fibres. Hair trap a lot of air which is used for ( a ) are... This phenomenon is called mulberry silk moth cocoons spun by different types of that. Neha went to the skin, lustrous ( shiny ) and elastic and can be obtained without killing animal. Lighter in weight ‘ dead ’ sheep because the uppermost layer of the figures given figure... At intervals of six days many people in our country a factory where hair of animals! Called wool which is wrapped over the cocoon for use as silk quality of wool what,. Be dyed in different colours four given fibres marked 1,2, 3 and 4 from! Which part of India, yak hair are not used silk fibre is obtained from fleece of sheep make woollen fabric also burns a... Into her cup of tea and a tangle of delicate threads separated from the of... Processed to obtained woollen yarn Class 6, 7, 8, 9, 10, 11 and 12 extremely! Health problems the workers suffered while working in a wool industry pupa is the caterpillar completely covered in fibres! Questions: ( a ) how her mother eating up mulberry leaves blood disease called sorter ’ fleece... Will be pure silk ) sheep is done after scouring lighter in.! The shopkeeper and burnt them your browser as reeling the silk obtained is understood as fleece of moth...
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