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

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