Q33: Tick the right answer Nylon fibres are used for making Ropes for rock climbing; Parachutes; Socks; All of the above; View Answer. The fibers which are obtained from plants and animals are known as natural fibers whereas synthetic fibers are man-made fibers. 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. Cotton . The fibres are very fine and lustrous, about 10μm(0.0004in)in diameter. How is Silk … Answer (c) Question 5. 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. When the eggs hatch, silkworms come out of the eggs. These silks are obtained from cocoons spun by the silkworms of different types of silk moths. So, silk is an animal fibre. Question 11 What are the different varieties of silk? (b) Animals fibers are silk and wool . 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. It is the larva (or caterpillar) of a silk moth which produces silk and not the adult silk moth. The pile of cocoons is placed in hot water. In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. Answer: Cotton – Cotton bolls (from the surface of cotton seeds) (fruit) Jute – Stem; Question: Name two items that are made from coconut fibre. is formed in liquid form in the two glands in the silkworms’s head. The silkworms enclose themselves completely inside the silken cocoons in two or three days. In India, cotton is … 3. polyster is a natural fibre please answer correct to be the brainilest if you will answer wrong god will punish you Answer– cotton plants, jute (b) Animals fibres are _____ and _____. The eggs are then warmed to a suitable temperature for hatching. (b) … Explanation: a)& b) Process of making yarn from fibres is called spinning. The rearing of silkworms for obtaining silk is called Sericulture. Question 4: From which parts of the plant cotton and jute are obtained? Hot water makes the silk fibres of cocoons to separate out. View Answer. The silkworms are fed cut-up mulberry leaves. Question 17. What are the common health problems found in the people who work in silk industry? Answer: Natural Fibres: wool, cotton, … Answer: a) True b) False c) False d) True e) True f) False g) False. 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. Page No 32: Question 6: How is jute fibre made from the jute plant? After harvesting, the stalks of … 4. Cocoons are collected and kept under the sun, or boiled, or exposed to steam. 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. mention any two. Silk fibres are converted into silk yarn which is used for making silk cloth. 3. The process of taking out silk fibres from the cocoons for use as silk is called reeling. The farmers keep these eggs at suitable temperature and humidity under hygienic conditions. Jute fibre is obtained from the stem of the jute plant. The cotton fibre is obtained from the fruit of the cotton plant known as cotton balls. 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 ✌ Artificial silk (called rayon) is obtained from wood pulp and it is made of modified plant material ‘cellulose. Top Answer. All the cocoons are collected at one place. What are the common health problems found in the people who work in silk industry? D) Sugars done clear. Sericulture is a very old and common occupation in India, producing silk on a commercial basis. The cocoons having developing silkworms inside them are used to obtain silk. c) We get jute fibres from the outer layer of a stem of the jute plant. Answer: Cotton is obtained from the fruits of the cotton plant, called cotton balls. So, silk is an animal fibre. Silk fibres obtained from cocoons are spun (twisted) to form silk threads called silk yarn. Answer: It is soft, lustrous and elastic. carefully on paper strips (or cloth strips) and sold to silkworm farmers. Nylon and polyester on the … The silk yarn is then woven on looms into silk cloth by the weavers. The cocoons are then unwrapped to get silk fibre, which is then woven into fabric. 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. Answer-wool, silk. Fill in the blanks: (a) Plant fibres are obtained from____________ and___________ . Question 17. Natural silk is an animal fibre. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. Thank You......​. (Paper is also made of cellulose obtained from wood pulp). The most common silk moth is the mulberry silk moth. 2. Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk . What is pupa? In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. Question 18. (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. Silk fibres are obtained from silkworms. … 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 protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. 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. 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. Answer: Jute fibres are obtained from the stems of the jute plant. 3. Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. Synthetic fibre: The fibre which are synthesized in industry from simple chemicals obtained from petroleum are called synthetic fibre. This helps in separating out the silk fibres. Silk is formed in liquid form in the two glands in the silkworms’s head. Wool fibre cannot be obtained from which of the following? Answer (d) Question 6 . Answer-False (d) Polyester is a natural fibre. Soon the silkworm (or caterpillar) covers itself completely by silk fibres. Answer: Ropes and jute bags. What is sericulture? 3. Question 9 Name the tree whose leaves provide food for the silkworms? Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? Silk is a natural fibre which is obtained from an insect (called silk moth). The long silk fibres are obtained by unwinding the threads from cocoons. Classify the following fibers as natural or synthetic: nylon, wool, cotton, silk, … Examples: cotton, jute, silk, wool. (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. f) Silk fibre is obtained from the stem of a plant g) Polyester is a natural fibre. Answer: It is soft, lustrous and elastic. Animal fibre: Silk and wool are animal fibre. What is pupa? Silk fibres are converted into silk yarn which is used f… A material which is composed of thin and continuous strands is known as fiber. 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. fibres and the developing silkworm (as pupa) gets killed. The cocoon is made of a thread of raw silk from 300to about 900m(1,000to3,000ft)long. 4. As soon as the cocoon is formed it is used to obtain silk. Silkis a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. Your email address will not be published. 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. From which parts of the plant cotton and … Examples: Nylon, Acrylic, Polyester. Solution: (c) Silk is a natural fibre which is obtained from the cocoons of silk moths. Answer: (a) Plant fibers are obtained from cotton and jute . Answer: Wool can be obtained … Question 3  How will you distinguish between natural and artificial silk? big in size. Answer: … The larva (or caterpillar) of a silk moth which produces silk is called silkworm. Answer: The rearing of silkworms for obtaining … Answer: Yarn is a kind of long … Examples of natural fibers are cotton and silk whereas examples of synthetic fi… Answer 4: Cotton is obtained from the fruits of the cotton plant, called cotton balls. Your email address will not be published. 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? 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 ? 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? She has started this educational website with the mindset of spreading Free Education to everyone. C) Protein done clear. The cocoon is made by silkworm to protect its development as pupa. Q34: Name the source of natural fibre “cotton”. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, … Then it swings its head from side to side in the form of figure of eight. Silk is a natural fibre which is obtained from an insect (called silk moth). The silk produced by the silkworms of different varieties of silk moths is different in texture (coarse, smooth, shiny, etc.). 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. How is Silk … Last Updated on March 20, 2019 By Mrs Shilpi Nagpal Leave a Comment. mention any two. How is it done? material ‘cellulose. The silkworms feed on the leaves of mulberry tree and grow bigger in size. 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 silky covering spun by the silkworm (or caterpillar) of silk moth is called cocoon. B) Fat done clear. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. This breaking of cocoon causes damage to its silk threads and hence lowers the quality of silk. nylon, wool, cotton, silk, polyester, jute. The larvae of silk moth are called caterpillars or silkworms. Silk fibre is made of a protein. The soft looking silk yarn is as strong as a comparable thread of steel. (1) The female silk moth lays eggs on the leaves of a tree (such as mulberry tree). The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Natural silk is an animal fibre. Question 5 Name two items that are made from coconut fibre. In this way, the life history of silk moth is completed. Question 6 Explain the process of making yarn from fibre. Question 6 Describe the life history of silk moth? g) Polyester is a natural fibre. The adult female silk moth then lays more eggs. When the eggs hatch, silkworms (larvae or caterpillars) come out of eggs. What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? 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