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 Your email address will not be published.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