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 Your email address will not be published.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