silk fibre is obtained from answer

silk fibre is obtained from answer

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

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