The farmers keep these eggs at suitable temperature and humidity under hygienic conditions. What is sericulture? Synthetic fibre: The fibre which are synthesized in industry from simple chemicals obtained from petroleum are called synthetic fibre. … The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Answer-False Q3. 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. Silk is a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. So, silk is an animal fibre. Fill in the blanks: (a) Plant fibres are obtained from____________ and___________ . (Paper is also made of cellulose obtained from wood pulp). big in size. The rearing of silkworms, processing of cocoons to obtain silk fibres and making of silk fabrics (silk cloth) from silk fibres. Hot water makes the silk fibres of cocoons to separate out. Question 5 Name two items that are made from coconut fibre. 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. 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. material ‘cellulose. (a) Goat (b) Llama (c) Alpaca (d) Moth . Hence, they are natural fibres. 4. 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 ? f) Silk fibre is obtained from the stem of a plant g) Polyester is a natural fibre. 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. The silky covering spun by the silkworm (or caterpillar) of silk moth is called cocoon. fibres and the developing silkworm (as pupa) gets killed. In this way, the life history of silk moth is completed. She has started this educational website with the mindset of spreading Free Education to everyone. Silk is a natural fibre which is obtained from an insect (called silk moth). f) Silk fibre is obtained from the stem of the plant. The cocoons having developing silkworms inside them are used to obtain silk. 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 ✌ The larva (or caterpillar) of a silk moth which produces silk is called silkworm. (b) … Question 5 What is a cocoon? In order to produce silk, the silkworm developing inside the cocoon (as pupa) is not allowed to mature into an adult silk moth. Your email address will not be published. The eggs are then warmed to a suitable temperature for hatching. Question 7: From which part of the plant jute and cotton are obtained? After 25-30 days, the silkworms stop eating and get ready to spin cocoons. mention any two. These silks are obtained from cocoons spun by the silkworms of different types of silk moths. Answer: … 2009-04-29 18:31:44 2009-04-29 18:31:44 . Classify the following fibers as natural or synthetic: nylon, wool, cotton, silk, … Question 4 What is meant by reeling the silk? Question 4: From which parts of the plant cotton and jute are obtained? Q32: Name the fibre having properties similar to that of silk. The cotton fibre is obtained from the fruit of the cotton plant known as cotton balls. 2. the most common variety of silk is mulberry silk. Egg——> Larva(caterpillar) ——> Pupa ——> Silk moth. Silkis a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. 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. Answer-wool, silk. (Paper is also made of cellulose obtained from wood pulp). Answer: The rearing of silkworms for obtaining … C) Protein done clear. The silkworms are fed cut-up mulberry leaves. Answer (c) Question 5. When the eggs hatch, silkworms come out of the eggs. Silk fibre is made of a protein. Animal fibre: Silk and wool are animal fibre. It is the larva (or caterpillar) of a silk moth which produces silk and not the adult silk moth. As soon as the cocoon is formed it is used to obtain silk. The process by which silk thread is separated from the cocoon is called reeling the silk. Question 8: Name wool-yielding animals other than sheep. In India, cotton is … Plant Fibre: Cotton and jute are plant fibre. Page No 32: Question 6: How is jute fibre made from the jute plant? Q4. Answer: a) True b) False c) False d) True e) True f) False g) False. Sericulture is a very old and common occupation in India, producing silk on a commercial basis. This breaking of cocoon causes damage to its silk threads and hence lowers the quality of silk. Question 17. g) Polyester is a natural fibre. How is Silk … Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? Answer-False (d) Polyester is a natural fibre. (1) Rearing of Silkworms to Obtain Cocoons, (2) Processing of Cocoons to Obtain Silk Fibres, (3) Converting Silk Fibres into Silk Cloth. 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 fibres are obtained from silkworms. Answer: Natural Fibres: wool, cotton, … D) Sugars done clear. The silkworms feed on the leaves of mulberry tree and grow bigger in size. Answer: It is soft, lustrous and elastic. Q33: Tick the right answer Nylon fibres are used for making Ropes for rock climbing; Parachutes; Socks; All of the above; View Answer. Answer: Jute fibres are obtained from the stems of the jute plant. The adult female silk moth then lays more eggs. Question 6 Explain the process of making yarn from fibre. All the cocoons are collected at one place. 2.jute is the outer covering of coconut. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. Silk fibres are converted into silk yarn which is used for making silk cloth. The silk produced by the silkworms of different varieties of silk moths is different in texture (coarse, smooth, shiny, etc.). Or silkworms on a commercial basis and humidity under hygienic conditions be of two types: natural fiber synthetic... 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