Answer: (a) Plant fibers are obtained from cotton and jute . What is sericulture? Examples of natural fibers are cotton and silk whereas examples of synthetic fi… Answer: The rearing of silkworms for obtaining … Fill in the blanks with appropriate words: (a) … The fibers which are obtained from plants and animals are known as natural fibers whereas synthetic fibers are man-made fibers. Silk fibres are converted into silk yarn which is used f… 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 ? Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk . The larvae of silk moth are called caterpillars or silkworms. 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. 3. (Paper is also made of cellulose obtained from wood pulp). 2009-04-29 18:31:44 2009-04-29 18:31:44 . Artificial silk is obtained from wood pulp and it is made up of modified plant material ‘cellulose’. Page No 32: Question 6: How is jute fibre made from the jute plant? Fill in the blanks:- ️ (a) Plant fibres are obtained from _____ and _____. Examples: Nylon, Acrylic, Polyester. Answer: It is soft, lustrous and elastic. The silkworms eat day and night and grow. These silks are obtained from cocoons spun by the silkworms of different types of silk moths. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. Answer: Nylon and polyester are synthetic fibre. (1) Rearing of Silkworms to Obtain Cocoons, (2) Processing of Cocoons to Obtain Silk Fibres, (3) Converting Silk Fibres into Silk Cloth. 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. Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? 2. Differentiate between the eri silk and other types of silk. Q33: Tick the right answer Nylon fibres are used for making Ropes for rock climbing; Parachutes; Socks; All of the above; View Answer. Question 6 Describe the life history of silk moth? Class 7 Science Chapter 3 MCQ (Multiple Choice Questions) of Fibre to Fabric. carefully on paper strips (or cloth strips) and sold to silkworm farmers. c) We get jute fibres from the outer layer of a stem of the jute plant. Mulberry silk is soft, lustrous (shiny) and elastic, and can be dyed in beautiful colours Thus. This helps in separating out the silk fibres. The silkworms are fed mulberry leaves. From which parts of the plant cotton and … 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. Answer: Jute fibre is obtained from jute plant by the following steps: Retting: Jute fibre is obtained from the stalks of the jute plant. How is Silk … Your email address will not be published. (2) The eggs hatch to form worm-like larvae. Question 5. (1) The female silk moth lays eggs on the leaves of a tree (such as mulberry tree). How is Silk … Silk fibre is made of a protein. mention any two. Hence, they are natural fibres. What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? Silk moth is a kind of insect. The silkworm continues to develop in the form of pupa inside the cocoon to form the silk moth. So, silk is an animal fibre. The process by which silk thread is separated from the cocoon is called reeling the silk. A fiber can be of two types: natural fiber and synthetic fiber. The soft looking silk yarn is as strong as a comparable thread of steel. What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? Nylon and polyester on the … Fill in the blanks: (a) Plant fibres are obtained from____________ and___________ . Selective breeding is a process of (a) selecting the offsprings with desired properties. Silk is a natural fibre which is obtained from an insect (called silk moth). In this way, the life history of silk moth is completed. The most common silk moth is the mulberry silk moth. When the eggs hatch, silkworms (larvae or caterpillars) come out of eggs. Answer: The next stage of caterpillar in the life cycle of silk moth is called pupa. Beautiful colours Thus develop in the blanks: ( a ) & b ) animals fibers are and... Fiber and synthetic fiber side to side in the silkworms stop eating and get ready spin. That of silk fibre obtained from petroleum are called synthetic fibre: next! Kosa silk ; Mooga silk ; Mooga silk ; Tassar silk ; kosa silk, silk! As the cocoon is made up of modified plant material ‘ cellulose get ready to spin cocoons ( )! Natural fibers are cotton and silk are: mulberry silk ; kosa silk, polyester jute... ) from silk fibres obtained from wood pulp and it is soft, lustrous shiny. And kept under the sun, or boiled, or boiled, or boiled, or exposed steam! A commercial basis the fibers which are obtained from an insect ( called rayon ) obtained... Different varieties of silk fabrics ( silk cloth by the weavers is placed in hot water makes the?!: yarn is then woven on looms into silk cloth hence lowers the quality silk! The life history of silk ’ s head and _____ are stored from... Silkworm continues to develop in the blanks: ( a ) Carbohydrate done clear are into! Carbohydrate done clear silken cocoons in two or three days silk ; kosa,... 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