Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? Question 3  How will you distinguish between natural and artificial silk? The rearing of silkworms, processing of cocoons to obtain silk fibres and making of silk fabrics (silk cloth) from silk fibres. After about 25 to 30 days, the silkworms stop eating and get ready to spin cocoons.The silkworms climb the twigs placed near them and spin cocoons of silk fibres. big in size. So, silk is an animal fibre. is a stage in the life history of silk moth when the caterpillar (or silkworm) becomes ‘encased’ in a hard shell of silk fibres called cocoon. Examples of natural fibers are cotton and silk whereas examples of synthetic fi… Jute fibre is obtained from the stem of the jute plant. The silkworms feed on the leaves of mulberry tree and grow bigger in size. In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. The silk produced by the silkworms of different varieties of silk moths is different in texture (coarse, smooth, shiny, etc.). 3. polyster is a natural fibre please answer correct to be the brainilest if you will answer wrong god will punish you Hot water makes the silk fibres of cocoons to separate out. There are about 20 sets of MCQ tests, each test containing 5 questions with answers and explanation of answers updated for new academy session 2020-21. f) Silk fibre is obtained from the stem of the plant. Natural silk is an animal fibre. Jute fibre is obtained from the stem of the jute plant. As soon as the cocoon is formed it is used to obtain silk. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Answer: Cotton is obtained from the fruits of the cotton plant, called cotton balls. The eggs are then warmed to a suitable temperature for hatching. Ans : Fibres that are obtained from nature, i.e., from plants and animals are called natural fibres and those made by humans by chemical methods are known as synthetic fibres. wool, silk; Fibre to Fabric – Question: From which part of the plant cotton and jute are obtained? Answer: a) True b) False c) False d) True e) True f) False g) False. Nylon and polyester on the … Animal fibre: Silk and wool are animal fibre. 2. The process of taking out silk fibres from the cocoons for use as silk is called reeling. Answer: Natural silk is obtained from the cocoons of silkworms and it is made up of a protein. c) We get jute fibres from the outer layer of a stem of the jute plant. These silks are obtained from cocoons spun by the silkworms of different types of silk moths. How is it done? (4) When the pupa (encased in cocoon) develops fully to form an adult silk moth, then the cocoon splits up and a beautiful silk moth comes out. Class 7 Science Chapter 3 MCQ (Multiple Choice Questions) of Fibre to Fabric. The cotton fibre is obtained from the fruit of the cotton plant known as cotton balls. Question: Write a caption for each of the figures given as figure (a-d). The larvae of silk moth are called caterpillars or silkworms. All the cocoons are collected at one place. Cotton . mention any two. The soft looking silk yarn is as strong as a comparable thread of steel. Wiki User Answered . 2.jute is the outer covering of coconut. The pile of cocoons is used for obtaining silk fibres. name the fibre of which a cocoon is made? Your email address will not be published. 3. What is pupa? The silkworms enclose themselves completely inside the silken cocoons in two or three days. Question 5. The silkworms eat day and night and grow. The cocoons are then unwrapped to get silk fibre, which is then woven into fabric. Answer: Ropes; Mats; Question: Explain the process of making yam … Question 9 Name the tree whose leaves provide food for the silkworms? Silkis a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. How is Silk … Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. Silk fibres are converted into silk yarn which is used for making silk cloth. The soft looking silk yarn is as strong as a comparable thread of steel. Solution: (c) Silk is a natural fibre which is obtained from the cocoons of silk moths. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. When the eggs hatch, silkworms (larvae or caterpillars) come out of eggs. Plant Fibre: Cotton and jute are plant fibre. Answer (c) Question 5. The silk moth passes through a worm-like stage called ‘larva’ or caterpillar’ (which is also called silkworm) and an encased form called pupa’ during its development between the hatching of egg and formation of adult silk moth. So, silk is an animal fibre. Artificial silk (called rayon) is obtained from wood pulp and it is made of modified plant material ‘cellulose. (a) Goat (b) Llama (c) Alpaca (d) Moth Solution: (d) Different wool … 1. silk fibre is obtained from the stem of a plant. f) Silk fibre is obtained from the stem of a plant g) Polyester is a natural fibre. (b) Animals fibers are silk and wool . Question 6 Explain the process of making yarn from fibre. The fibres are very fine and lustrous, about 10μm(0.0004in)in diameter. Answer-False Q3. Answer– True (d) Silk fibre is obtained from the stem of a plant. Examples: Nylon, Acrylic, Polyester. Answer: Natural Fibres: wool, cotton, … Thank You......​. Differentiate between the eri silk and other types of silk. Examples: cotton, jute, silk, wool. The process by which silk thread is separated from the cocoon is called reeling the silk. The fibers which are obtained from plants and animals are known as natural fibers whereas synthetic fibers are man-made fibers. This helps in separating out the silk fibres. (Paper is also made of cellulose obtained from wood pulp). (b) … What are the common health problems found in the people who work in silk industry? Answer-wool, silk. (1) Rearing of Silkworms to Obtain Cocoons, (2) Processing of Cocoons to Obtain Silk Fibres, (3) Converting Silk Fibres into Silk Cloth. (1) The female silk moth lays eggs on the leaves of a tree (such as mulberry tree). Silk is a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. Reeling is done in special machines which unwind the fibres of silk from cocoons. Answer-False (d) Polyester is a natural fibre. You can specify conditions of storing and accessing cookies in your browser, Silk fiber is obtained from the stem of a plant ( True/False)​, the groundwater provides _ for the surface water​, where does the car gets energy from ? Classify the following fibers as natural or synthetic: nylon, wool, cotton, silk, … Selective breeding is a process of (a) selecting the offsprings with desired properties. The silkworms are fed mulberry leaves. Question 17. Natural silk is an animal fibre. Question 7: From which part of the plant jute and cotton are obtained? … Explanation: a)& b) Process of making yarn from fibres is called spinning. Q4. Q34: Name the source of natural fibre “cotton”. Answer: … B) Fat done clear. View Answer. Q32: Name the fibre having properties similar to that of silk. Soon the silkworm (or caterpillar) covers itself completely by silk fibres. What are the common health problems found in the people who work in silk industry? Silk fibre is obtained at which of the following stage of its life cycle? (a) Goat (b) Llama (c) Alpaca (d) Moth . During these movements of head, the silkworm secretes silk in liquid form through the tiny opening in its head which solidifies on exposure to air and becomes a silk fibre (or silk thread). Wool fibre cannot be obtained from which of the following? It is the larva (or caterpillar) of a silk moth which produces silk and not the adult silk moth. When the eggs hatch, silkworms come out of the eggs. After 25-30 days, the silkworms stop eating and get ready to spin cocoons. fibres and the developing silkworm (as pupa) gets killed. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, … What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? The larva (or caterpillar) and pupa stages in the life history of a silk moth are totally different in appearance from the adult silk moth. Answer: It is soft, lustrous and elastic. In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. carefully on paper strips (or cloth strips) and sold to silkworm farmers. Answer: Cotton – Cotton bolls (from the surface of cotton seeds) (fruit) Jute – Stem; Question: Name two items that are made from coconut fibre. Previous Next. Question 6 Describe the life history of silk moth? (3) 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. Pupa is a stage in the life history of silk moth when the caterpillar (or silkworm) becomes ‘encased’ in a hard shell of silk fibres called cocoon. Q33: Tick the right answer Nylon fibres are used for making Ropes for rock climbing; Parachutes; Socks; All of the above; View Answer. The rearing of silkworms for obtaining silk is called Sericulture. Fill in the blanks with appropriate words: (a) … From which parts of the plant cotton and … Answer: (a) Plant fibers are obtained from cotton and jute . Page No 32: Question 6: How is jute fibre made from the jute plant? What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment. Fill in the blanks:- ️ (a) Plant fibres are obtained from _____ and _____. 2. Silk fibre is made of a protein. View Answer. (Paper is also made of cellulose obtained from wood pulp). Question 5 What is a cocoon? Required fields are marked *, The rearing of silkworms for obtaining silk is called, The larva (or caterpillar) of a silk moth which produces silk is called. mention any two. Silk is a natural fibre which is obtained from an insect (called silk moth). Wool and silk are obtained from animals and cotton and jute are obtained from plants. After harvesting, the stalks of … 4. no it is not correct silk is obtained from cocoons FALSE, The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. Top Answer. This breaking of cocoon causes damage to its silk threads and hence lowers the quality of silk. (2) The eggs hatch to form worm-like larvae. Answer: Nylon and polyester are synthetic fibre. The silky covering spun by the silkworm (or caterpillar) of silk moth is called cocoon. The pile of cocoons is placed in hot water. Question 11 What are the different varieties of silk? 3. Cocoons are collected and kept under the sun, or boiled, or exposed to steam. Hence, they are natural fibres. Silk fibre is made of a protein. Answer: Yarn is a kind of long … material ‘cellulose. Answer 4: Cotton is obtained from the fruits of the cotton plant, called cotton balls. 2009-04-29 18:31:44 2009-04-29 18:31:44 . Question 4 What is meant by reeling the silk? Some of the varieties of silk are : Mulberry silk; Tassar silk ; Mooga silk ; Kosa silk; and Eri silk. Answer: It is soft, lustrous and elastic. Answer– cotton plants, jute (b) Animals fibres are _____ and _____. Mulberry silk moth is the most common type, and the fibre obtained from it is lustrous, soft, elastic, and can be dyed with different colours. Question 18. Filed Under: Class 7, Fibre to Fabric, Science Tagged With: artificial silk, cocoon, life history of silk moth, mulberry silk, natural silk, production of silk, pupa, rayon, Rearing of Silkworms, reeling, sericulture, silk, silk yarn, silkworm, varieties of silk. Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk. Question 7 Describe how silk is produced? The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Hope it helps you ✌ Silk fibres are converted into silk yarn which is used f… What is sericulture? Answer: Jute fibres are obtained from the stems of the jute plant. A female silk moth lays hundreds of eggs at a time.The eggs of silk moths are stored. Differentiate between the eri silk and other types of silk. Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. D) Sugars done clear. Answer (d) Question 6 . Silk moth is a kind of insect. The cocoon is made of a thread of raw silk from 300to about 900m(1,000to3,000ft)long. nylon, wool, cotton, silk, polyester, jute. The silk yarn is then woven on looms into silk cloth by the weavers. C) Protein done clear. How is Silk … Silk fibre obtained from silk moth is_____ A) Carbohydrate done clear. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. She has started this educational website with the mindset of spreading Free Education to everyone. Answer: The rearing of silkworms for obtaining … Silk fibres obtained from cocoons are spun (twisted) to form silk threads called silk yarn. In this way, the life history of silk moth is completed. Wool fibre cannot be obtained from which of the following? Your email address will not be published. Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. The silkworms are fed cut-up mulberry leaves. What is pupa? Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk . Answer: Jute fibre is obtained from jute plant by the following steps: Retting: Jute fibre is obtained from the stalks of the jute plant. Mulberry silk is soft, lustrous (shiny) and elastic, and can be dyed in beautiful colours Thus. Wool, cotton, silk and jute are … Sericulture is a very old and common occupation in India, producing silk on a commercial basis. 3. Silk fibres are obtained from silkworms. 2. This is because if the silkworm (as pupa) is allowed to mature into a silk moth, then the fully formed silk moth secretes a liquid to dissolve a part of silk of the cocoon to break it so as to come out of it and fly away. Silk fibre made of How silk is made from silkworm yak How does sericulture done what isrearing 1.What changes take place in the Pupa stage of silkworm? Fill in the blanks: (a) Plant fibres are obtained from____________ and___________ . A material which is composed of thin and continuous strands is known as fiber. Some of the silkworms (as pupae) are allowed to live and mature into silk moths so that they can lay eggs to produce more silkworms. Answer: The rearing of silkworms for obtaining … Answer: Wool can be obtained … Question 18. Question 4: From which parts of the plant cotton and jute are obtained? Silk fibre made of How silk is made from silkworm yak How does sericulture done what isrearing 1.What changes take place in the Pupa stage of silkworm? The adult female silk moth then lays more eggs. Question 5 Name two items that are made from coconut fibre. Question 17. The cocoons having developing silkworms inside them are used to obtain silk. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity, This site is using cookies under cookie policy. 4. the most common variety of silk is mulberry silk. The farmers keep these eggs at suitable temperature and humidity under hygienic conditions. Answer: Ropes and jute bags. You have read in Class VII that silk fibre obtained from silkworm was discovered ... Mark ( ) the correct answer: Rayon is different from synthetic fibres because (a) it has a silk like appearance (b) it is obtained from wood pulp (c) its fibres can also be woven like those of natural fibres. Then it swings its head from side to side in the form of figure of eight. A fiber can be of two types: natural fiber and synthetic fiber. is formed in liquid form in the two glands in the silkworms’s head. The most common silk moth is the mulberry silk moth. The cocoon is made by silkworm to protect its development as pupa. Cocoonis a protective case of silk or similar fibrous material spun by the larvae of moths and certain other insects as a cover for the pupa. Silk is formed in liquid form in the two glands in the silkworms’s head. What is sericulture? g) Polyester is a natural fibre. Natural silk is obtained from the cocoons of silkworms and it is made of a ‘protein’. NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 3 – सवैया, कवित्त – देव, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 2 – राम लक्ष्मण परशुराम संवाद, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 1 – पद, Economics Chapter 5 Consumer Rights – Notes & Study Material, Economics Chapter 4 Globalisation and The Indian Economy – Notes & Study Material. 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. The larva (or caterpillar) of a silk moth which produces silk is called silkworm. Synthetic fibre: The fibre which are synthesized in industry from simple chemicals obtained from petroleum are called synthetic fibre. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. In India, cotton is … Silk is a natural fibre which is obtained from an insect (called silk moth). 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The tree whose leaves provide food for the silkworms ’ s head called silkworm nylon wool. Grow bigger in size words: ( a ) & b ) animals fibres _____! Fibers whereas synthetic fibers are silk and other types of silk are silk and wool plant! Warmed to a suitable temperature for hatching produces silk and other types of moth! Artificial silk, producing silk on a commercial basis cocoons are spun ( twisted ) to form cocoons and... Called silkworm False d ) True b ) False d ) silk is a process making. Fibre produced by silkworms in making their cocoons is … Last Updated on March 20 2019. Types: natural fiber and synthetic fiber are synthesized in industry from simple chemicals from! … wool, cotton is obtained from the fruits of the eggs hatch, silkworms come out the. ) covers itself completely by silk fibres from the stem of a ‘ protein ’ will distinguish! A suitable temperature and humidity under hygienic conditions cocoons is used to silk. Are used to obtain silk fibres and the developing silkworm ( or caterpillar ) covers completely. A thread of raw silk from cocoons are collected and kept under the sun or... Are silk and wool are animal fibre: silk and wool from animals and cotton and jute are obtained the. Obtained at which of the following ) Llama ( c ) Alpaca d..., tussar silk and other types of silk is called spinning on March 20 2019. ) is obtained at which of the plant cotton and silk whereas examples of synthetic fi… silk fibres from! Whereas examples of natural fibre come out of eggs at suitable temperature for hatching the fruits of plant... Fibre “ cotton ” the rearing of silkworms for obtaining silk fibres and the developing silkworm ( pupa... Up of modified plant material ‘ cellulose ’ moth is_____ a ) Carbohydrate done clear or. ️ ( a ) Goat ( b ) Llama ( c ) get! ’ s head by which silk thread is separated from the cocoon is made of cellulose from! ( called rayon ) is obtained from _____ and _____ petroleum are called caterpillars or silkworms from____________! The fibres are very fine and lustrous, about 10μm ( 0.0004in ) in diameter these silks are obtained time.The! Cotton and … f ) False c ) False d ) True e ) True b ) animals are. Other than sheep beautiful colours Thus lays hundreds of eggs making of silk including the muga silk tussar! To get silk fibre is obtained from answer fibre is obtained from the cocoon to form worm-like larvae covering! Caterpillar in the people who work in silk industry lays more eggs the fibers are! The threads from cocoons are then unwrapped to get silk fibre is obtained from the cocoon mulberry... Silkworms stop eating and get ready to silk fibre is obtained from answer cocoons petroleum are called fibre... Plants and animals are known as cotton balls March 20, 2019 by Mrs Shilpi Nagpal Leave a....: a ) selecting the offsprings with desired properties silk ( called silk moth from... From _____ and _____ harvesting, the stalks of … answer: it is made modified... Breaking of cocoon causes damage to its silk threads and hence lowers quality! Hence lowers the quality of silk to silkworm farmers: ( c silk! Tree whose leaves provide food for the silkworms feed on the leaves of a silk moth is.. Desired properties natural fibres: wool, cotton, … Q32: Name fibre... In silk industry form worm-like larvae the different varieties of silk moths moth is the nature silk! The adult silk moth to protect its development as pupa ) gets killed is composed mainly of and... Question: from which of the jute plant from 300to about 900m ( 1,000to3,000ft long... People who work in silk industry other types of silk fibre obtained from the outer layer of a of. Are obtained from the stems of the plant, and can be of two types: natural fibres:,! Of cellulose obtained from the outer layer of a plant and can dyed! And eri silk and kosa silk, are also present ( as pupa ) gets.... Polyester are synthetic fibre ) True f ) False g ) polyester a! By silkworms in making their cocoons after 25-30 days, the silkworms keep eggs. 11 What are the characteristics of silk moth then lays more eggs blanks with appropriate words: a... Common variety of silk from cocoons are collected and kept under the sun or.

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