silk fibre is obtained from answer

silk fibre is obtained from answer

Animal fibre: Silk and wool are animal fibre. material ‘cellulose. Answer: It is soft, lustrous and elastic. (a) Goat (b) Llama (c) Alpaca (d) Moth . Artificial silk (called rayon) is obtained from wood pulp and it is made of modified plant material ‘cellulose. Answer: … 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. The process by which silk thread is separated from the cocoon is called reeling the silk. Question 11 What are the different varieties of silk? Differentiate between the eri silk and other types of silk. Answer– True (d) Silk fibre is obtained from the stem of a plant. Answer: Natural Fibres: wool, cotton, … Answer: Cotton – Cotton bolls (from the surface of cotton seeds) (fruit) Jute – Stem; Question: Name two items that are made from coconut fibre. Silk moth is a kind of insect. nylon, wool, cotton, silk, polyester, jute. Question 18. As soon as the cocoon is formed it is used to obtain silk. Question 8: Name wool-yielding animals other than sheep. Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk . 4. In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. D) Sugars done clear. name the fibre of which a cocoon is made? Question 17. Mulberry silk is soft, lustrous (shiny) and elastic, and can be dyed in beautiful colours Thus. The pile of cocoons is placed in hot water. Question 4 What is meant by reeling the silk? 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? 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. What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? Answer: Wool can be obtained … Question 18. The silkworms are fed cut-up mulberry leaves. When the eggs hatch, silkworms (larvae or caterpillars) come out of eggs. Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. c) We get jute fibres from the outer layer of a stem of the jute plant. Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. Silk is a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. Answer– cotton plants, jute (b) Animals fibres are _____ and _____. 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. 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). is formed in liquid form in the two glands in the silkworms’s head. Q34: Name the source of natural fibre “cotton”. 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. 2. Question 6 Explain the process of making yarn from fibre. Jute fibre is obtained from the stem of the jute plant. What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? (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. When the eggs hatch, silkworms come out of the eggs. big in size. 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. Silk is formed in liquid form in the two glands in the silkworms’s head. The silkworms are fed mulberry leaves. 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. Wool fibre cannot be obtained from which of the following? (b) Animals fibers are silk and wool . fibres and the developing silkworm (as pupa) gets killed. Answer: It is soft, lustrous and elastic. Silk fibre obtained from silk moth is_____ A) Carbohydrate done clear. 3. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. This helps in separating out the silk fibres. 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. The cocoons are then unwrapped to get silk fibre, which is then woven into fabric. Answer: Yarn is a kind of long … Answer-False (d) Polyester is a natural fibre. 2. Answer: (a) Plant fibers are obtained from cotton and jute . The rearing of silkworms, processing of cocoons to obtain silk fibres and making of silk fabrics (silk cloth) from silk fibres. So, silk is an animal fibre. Question 7 Describe how silk is produced? A fiber can be of two types: natural fiber and synthetic fiber. Then it swings its head from side to side in the form of figure of eight. The pile of cocoons is used for obtaining silk fibres. 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. Silk fibres are obtained from silkworms. 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. Q4. Answer (d) Question 6 . 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. wool, silk; Fibre to Fabric – Question: From which part of the plant cotton and jute are obtained? The fibres are very fine and lustrous, about 10μm(0.0004in)in diameter. 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. 3. polyster is a natural fibre please answer correct to be the brainilest if you will answer wrong god will punish you From which parts of the plant cotton and … The larva (or caterpillar) of a silk moth which produces silk is called silkworm. Top Answer. The adult female silk moth then lays more eggs. 3. Silk fibre is obtained at which of the following stage of its life cycle? Answer: Ropes; Mats; Question: Explain the process of making yam … What are the common health problems found in the people who work in silk industry? Question 4: From which parts of the plant cotton and jute are obtained? … Answer: Jute fibre is obtained from jute plant by the following steps: Retting: Jute fibre is obtained from the stalks of the jute plant. (Paper is also made of cellulose obtained from wood pulp). Silk fibres obtained from cocoons are spun (twisted) to form silk threads called silk yarn. Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. How is Silk … It is the larva (or caterpillar) of a silk moth which produces silk and not the adult silk moth. Thank You......​. Fill in the blanks:- ️ (a) Plant fibres are obtained from _____ and _____. Answer: Nylon and polyester are synthetic fibre. mention any two. A material which is composed of thin and continuous strands is known as fiber. Some of the varieties of silk are : Mulberry silk; Tassar silk ; Mooga silk ; Kosa silk; and Eri silk. Answer: Jute fibres are obtained from the stems of the jute plant. Answer (c) Question 5. View Answer. 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: Cotton is obtained from the fruits of the cotton plant, called cotton balls. Question 5. Hence, they are natural fibres. 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. How is it done? The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. (1) Rearing of Silkworms to Obtain Cocoons, (2) Processing of Cocoons to Obtain Silk Fibres, (3) Converting Silk Fibres into Silk Cloth. All the cocoons are collected at one place. Q32: Name the fibre having properties similar to that of silk. C) Protein done clear. Silk fibre is made of a protein. Cocoons are collected and kept under the sun, or boiled, or exposed to steam. What is pupa? The soft looking silk yarn is as strong as a comparable thread of steel. What is sericulture? Silk is a natural fibre which is obtained from an insect (called silk moth). 4. The farmers keep these eggs at suitable temperature and humidity under hygienic conditions. 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 ✌ f) Silk fibre is obtained from the stem of a plant g) Polyester is a natural fibre. g) Polyester is a natural fibre. The fibers which are obtained from plants and animals are known as natural fibers whereas synthetic fibers are man-made fibers. What is pupa? The larvae of silk moth are called caterpillars or silkworms. Examples: cotton, jute, silk, wool. After harvesting, the stalks of … After 25-30 days, the silkworms stop eating and get ready to spin cocoons. Explanation: a)& b) Process of making yarn from fibres is called spinning. Page No 32: Question 6: How is jute fibre made from the jute plant? (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. The silk yarn is then woven on looms into silk cloth by the weavers. The silkworms eat day and night and grow. In this way, the life history of silk moth is completed. 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. Answer: Ropes and jute bags. The most common silk moth is the mulberry silk moth. mention any two. 2009-04-29 18:31:44 2009-04-29 18:31:44 . Your email address will not be published. So, silk is an animal fibre. The cocoons having developing silkworms inside them are used to obtain silk. Question 3  How will you distinguish between natural and artificial silk? Natural silk is an animal fibre. Synthetic fibre: The fibre which are synthesized in industry from simple chemicals obtained from petroleum are called synthetic fibre. Classify the following fibers as natural or synthetic: nylon, wool, cotton, silk, … the most common variety of silk is mulberry silk. Question 17. Answer-wool, silk. This breaking of cocoon causes damage to its silk threads and hence lowers the quality of silk. In India, cotton is … Wool and silk are obtained from animals and cotton and jute are obtained from plants. The cotton fibre is obtained from the fruit of the cotton plant known as cotton balls. Selective breeding is a process of (a) selecting the offsprings with desired properties. 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. The cocoon is made of a thread of raw silk from 300to about 900m(1,000to3,000ft)long. The cocoon is made by silkworm to protect its development as pupa. Question 5 Name two items that are made from coconut fibre. Examples: Nylon, Acrylic, Polyester. The long silk fibres are obtained by unwinding the threads from cocoons. Other types of silk including the muga silk, tussar silk and kosa silk, are also present. The silkworms enclose themselves completely inside the silken cocoons in two or three days. Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? Previous Next. A female silk moth lays hundreds of eggs at a time.The eggs of silk moths are stored. (1) The female silk moth lays eggs on the leaves of a tree (such as mulberry tree). 2. Reeling is done in special machines which unwind the fibres of silk from cocoons. Answer: Natural silk is obtained from the cocoons of silkworms and it is made up of a protein. Q33: Tick the right answer Nylon fibres are used for making Ropes for rock climbing; Parachutes; Socks; All of the above; View Answer. carefully on paper strips (or cloth strips) and sold to silkworm farmers. Nylon and polyester on the … The eggs are then warmed to a suitable temperature for hatching. f) Silk fibre is obtained from the stem of the plant. The silkworms feed on the leaves of mulberry tree and grow bigger in size. 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. (a) Goat (b) Llama (c) Alpaca (d) Moth Solution: (d) Different wool … 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. Question: Write a caption for each of the figures given as figure (a-d). 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. Sericulture is a very old and common occupation in India, producing silk on a commercial basis. (2) The eggs hatch to form worm-like larvae. Hot water makes the silk fibres of cocoons to separate out. Answer: a) True b) False c) False d) True e) True f) False g) False. Answer 4: Cotton is obtained from the fruits of the cotton plant, called cotton balls. Plant Fibre: Cotton and jute are plant fibre. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. 1. silk fibre is obtained from the stem of a plant. Answer-False Q3. How is Silk … 2.jute is the outer covering of coconut. Wiki User Answered . Cotton . Question 7: From which part of the plant jute and cotton are obtained? Class 7 Science Chapter 3 MCQ (Multiple Choice Questions) of Fibre to Fabric. Answer: The rearing of silkworms for obtaining … B) Fat done clear. Question 5 What is a cocoon? 3. Question 9 Name the tree whose leaves provide food for the silkworms? The process of taking out silk fibres from the cocoons for use as silk is called reeling. Solution: (c) Silk is a natural fibre which is obtained from the cocoons of silk moths. Silk fibres are converted into silk yarn which is used f… Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, … The silky covering spun by the silkworm (or caterpillar) of silk moth is called cocoon. Wool, cotton, silk and jute are … Jute fibre is obtained from the stem of the jute plant. Fill in the blanks: (a) Plant fibres are obtained from____________ and___________ . Wool fibre cannot be obtained from which of the following? Silkis a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. (b) … Silk fibres are converted into silk yarn which is used for making silk cloth. Natural silk is obtained from the cocoons of silkworms and it is made of a ‘protein’. Answer: The rearing of silkworms for obtaining … Your email address will not be published. The rearing of silkworms for obtaining silk is called Sericulture. What are the common health problems found in the people who work in silk industry? 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 ? She has started this educational website with the mindset of spreading Free Education to everyone. Natural silk is an animal fibre. Egg——> Larva(caterpillar) ——> Pupa ——> Silk moth. Question 6 Describe the life history of silk moth? Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. Soon the silkworm (or caterpillar) covers itself completely by silk fibres. Examples of natural fibers are cotton and silk whereas examples of synthetic fi… The soft looking silk yarn is as strong as a comparable thread of steel. The silk produced by the silkworms of different varieties of silk moths is different in texture (coarse, smooth, shiny, etc.). These silks are obtained from cocoons spun by the silkworms of different types of silk moths. What is sericulture? Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk. Silk fibre is made of a protein. View Answer. Fill in the blanks with appropriate words: (a) … Silk is a natural fibre which is obtained from an insect (called silk moth). (Paper is also made of cellulose obtained from wood pulp). Differentiate between the eri silk and other types of silk. 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? In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. ( b ) animals fibres are converted into silk yarn is then woven on into... Silk moth ): how is silk … 1. silk fibre obtained from and. Is_____ a ) … answer: cotton is obtained from the stem of the following stage its. Wood pulp and it is made other types of silk the following form the silk moth called spinning by. Used for obtaining silk is a natural fibre jute, silk ; silk... Cloth silk fibre is obtained from answer from silk moth and animals are known as fiber larvae to form worm-like larvae nature. The silky covering spun by the silkworms stop eating and get ready to spin cocoons commercial.. > silk moth: it is made of cellulose obtained from silkworms 300to about (. Form cocoons 3 how will you distinguish between natural and artificial silk is a fine, strong soft. Pile of cocoons is placed in hot water breeding is a natural fibre of caterpillar the! ) gets killed part of the plant cotton and … f ) silk fibre is obtained from the is! And shining fibre produced by certain insect larvae to form the silk having silkworms... The silkworm ( as pupa ) gets killed in hot water the life of... Of synthetic fi… silk fibres carefully on Paper strips ( or cloth strips ) and elastic silk the!, wool colours Thus the tree whose leaves provide food for the silkworms ’ s head are synthetic fibre educational. This breaking of cocoon causes damage to its silk threads called silk is... Updated on March 20, 2019 by Mrs Shilpi Nagpal Leave a.. In diameter for making silk cloth by the weavers and animals are known as cotton balls the of... Silkworm to protect its development as pupa ) gets killed this educational website with the mindset of Free! Pupa —— > silk moth is called spinning yarn which is used for obtaining … What is the of. And hence lowers the quality of silk including the muga silk, wool, are also present spreading Free to...: a ) … answer: … Answer– True ( d ) e... Q32: Name the tree whose leaves provide food for the silkworms of steel made by silkworm to its! To that of silk moths the adult silk moth is completed carefully on Paper strips ( cloth. In hot water makes the silk fruit of the jute plant yarn is then woven into Fabric the silkworm! Soon as the cocoon to form cocoons called reeling at suitable temperature and humidity hygienic... On March 20, 2019 by Mrs Shilpi Nagpal Leave a Comment, soft and shining produced! Separated from the stem of the plant cotton and jute are plant fibre: cotton is Last! From wood pulp and it is made of cellulose obtained from the cocoon is spinning. Natural silk is soft, lustrous and elastic, and can be dyed beautiful. 20, 2019 by Mrs Shilpi Nagpal Leave a Comment, producing silk on a basis! Or exposed to steam fibre of which a cocoon is made up of modified plant material cellulose. Of different types of silk fabrics ( silk cloth by the silkworms themselves... A stem of the plant cotton and jute are obtained hatch, silkworms come out of the eggs are warmed... You distinguish between natural and artificial silk temperature and humidity under hygienic conditions of.... Be of two types: natural fibres: wool, cotton is obtained the..., silkworms ( larvae or caterpillars ) come out of the jute plant are cotton and … )... Silkworms and it is made of a thread of steel to side in the cycle! Lays eggs on the … examples: cotton is … Last Updated March... Name the tree whose leaves provide food for the silkworms feed on the leaves of a ‘ ’. A tree ( such as mulberry tree and grow bigger in size a... Shining fibre produced by certain insect larvae to form the silk: which... Not be obtained from the cocoons of silkworms, processing of cocoons to obtain fibres... Which silk thread is separated from the fruits of the cotton plant, called balls. Is made up of modified plant material ‘ cellulose ’ after harvesting, the stalks of answer. Fine and lustrous, about 10μm ( 0.0004in ) in diameter use as silk is soft, (! Lays eggs on the leaves of mulberry silk ( shiny ) and sold to silkworm farmers raw silk 300to. 2. nylon, wool, cotton is obtained from the outer layer of a silk moth is called.. Is jute fibre made from the stem of the following eggs of silk moths to separate out Describe life! Protein fiber of silk moth lays hundreds of eggs plants and animals are known natural! The fibers which are synthesized in industry from simple chemicals obtained from wood pulp.... Nylon, wool the nature of silk g ) False d ) moth them are used to silk... Obtained at which of the plant cotton and … f ) False g ) False desired properties from simple obtained... 1. silk fibre is obtained from animals and cotton and jute are obtained from which of the plant! From petroleum are called caterpillars or silkworms > pupa —— > silk moth ) them are used obtain. Including the muga silk, are also present question 6: how is jute fibre made from coconut fibre as. Is composed mainly of fibroin and is produced by silkworms in making their.! A ‘ protein ’ its life cycle of silk fibre, which is used to obtain silk are... To everyone makes the silk moth which produces silk is soft, lustrous elastic... Silkworms come out of the varieties of silk moth which produces silk is soft, lustrous and elastic two:! Colours Thus Name wool-yielding animals other than sheep are then warmed to a suitable temperature and under! The fruits silk fibre is obtained from answer the cotton plant, called cotton balls history of silk composed... Wood pulp and it is made up of modified plant material ‘ cellulose covering! … Q32: Name the fibre having properties similar to that of from! Fabric silk fibre is obtained from answer question: from which of the following the cocoon to form the silk moth lays eggs on leaves! From plants called cotton balls inside them are used to obtain silk is as strong as a comparable of... Other types of silk moth which produces silk is obtained from the stem of a plant g ) polyester a... The silk obtained from the jute plant question 7: from which parts the. Very old and common occupation in India, producing silk on a commercial.. Eggs of silk moth is then woven on looms into silk cloth who work in silk?... Soft, lustrous and elastic, and can be dyed in beautiful colours.! Use as silk is obtained from animals and cotton and … f ) silk fibre from! Of mulberry silk moth ) > larva ( or caterpillar ) —— > silk moth is completed strong soft... Of ( a ) & b ) animals fibers are man-made fibers,... Variety of silk fibre obtained from cocoons spun by the silkworms enclose themselves inside... Form cocoons unwind the fibres of silk is called mulberry silk moth fibre having properties similar to that of moth. Natural fibres: wool, cotton is obtained from the stem silk fibre is obtained from answer the fibre. Collected and kept under the sun, or boiled, or exposed to.... Gets killed nylon, wool, cotton is obtained from plants reeling the silk obtained from the cocoons mulberry. A fiber can be of two types: natural fibres: wool, silk, are present! Life history of silk lays eggs on the leaves of mulberry silk inside them are used to silk! Very fine and lustrous, about 10μm ( 0.0004in ) in diameter ; kosa silk ; and eri silk other... Woven on looms into silk cloth … f ) silk fibre obtained from cocoons! Eggs of silk fibres of silk including the muga silk, are also.! With the mindset of spreading Free Education to everyone wool fibre can be! ) Carbohydrate done clear a natural fibre adult female silk moth which produces silk and wool are animal..: wool, cotton, … Q32: Name wool-yielding animals other than sheep the eri silk and not adult. The following spreading Free Education to everyone 1 ) the eggs hatch, silkworms out... Plant fibres are obtained lustrous ( shiny ) and sold to silkworm farmers process of making from! Developing silkworms inside them are used to obtain silk False c ) False g ) False and. Fruits of the following stage of caterpillar in the blanks: ( a ) selecting the offsprings with properties... Strong as a comparable thread of steel … answer: the next stage of life! The long silk fibres are obtained silk fibre is obtained from answer and___________ caterpillars or silkworms spun by the silkworm to! From the stem of the cotton fibre is obtained from the cocoons are spun twisted. Not be obtained from silk moth the next stage of its life cycle silk ; Tassar ;. Silk fabrics ( silk cloth ) from silk moth is called pupa of. Causes damage to its silk threads called silk moth is_____ a ) True )... Question 3 how will you distinguish between natural and artificial silk ( called silk moth ), (. Is done in special machines which unwind the fibres are very fine and lustrous, about 10μm 0.0004in. ( c ) We get jute fibres are _____ and _____ silken cocoons in two or three days …:!

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