(False) Concept insight: Silk fibre is obtained from cocoon of a silk moth. (d) True (e) True (f) False; Silk fibre is obtained from cocoon of the silk moth. Answer: False. e) Weaving of yarn makes a piece of fabric. Concept insight: Silk fibre is obtained from the cocoon of a silk moth. Q. Which of the following would be the right gift (a) Woollen shawl (b) Silk scarf (F) Silk fibre is obtained from the stem of a plant. Synthetic Fibre. Refuse (avoid) is the best way to manage plastic. Spinning is a process of making fibres. Jute is the outer covering of coconut. Moth silk is not a type of silk. (a) Silk and Wool fibres are obtained from animals. f) Silk fibre is obtained from the stem of a plant. 3. State whether the following statements are True or False. It is drawn by cocoon of silkworm.] (a) Silkworms are caterpillars of silk moth. Wool, cotton, silk, jute. Wool yielding animals have thick fur. Silk is obtained from the cocoon of silk worms. Q. Rearing and selective breeding of sheep is done. Question 3. (g) Polyester is a natural fibre. State whether the following statemepts are true or false – Yarn is made from fibres. Answer: True. (a) True (b) False; The process of making yarn from fibres is called spinning. NCERT Exemplar Problems Class 7 Science – Fibre to Fabric Question 1: The rearing of silkworms for obtaining silk is called (a) cocoon (b) silk (c) sericulture . (D) True (E) True (F) False : Silk fibre is obtained from silkworm (animal). It is a synthetic fibre- artificially made The silk worms feed on mulberry leaves and each worm spins a continuous thread, which is nearly 800 meters in length, to make a cocoon. Give reasons. Why? [ Silk fibre is obtained from animals. (d) silviculture Answer: (c) Sericulture is a practice of rearing silkworms for obtaining silk while silviculture is a practice of developing and caring forests Question 2: Which… (c) Wool yielding animals bear hair on their body. Fill in the blanks: g) Polyester is a natural fibre. True or False : Question 1. The process of removing seed from cotton is called ginning. (c) False; Jute fibre is obtained from the stem of jute plant. Answer: False. Answer: True. State the following statement are true or false a) Yarn is made from fibres b) Spinning is a process of making fibres c) Jute is the outer covering of coconut d) The process of removing seed from cotton is called ginning. A natural fibre obtained by boiling of cocoons is called _____ Answer: Raincoat; Resin codes; polymer; plant fibre; silk; III. Differentiate between the larva stage and pupa stage in the life cycle of a silk moth. If false, correct them. [ Polyester is synthetic fibre.] (True) e) Weaving of yarn makes a piece of fabric. (C) False : Jute is obtained from jute plant (Corchorus). (d) Mulberry silk, tassar silk, mooga silk and eri silk are different types of silk produced from cocoons of different types of silk moths. (True) f) Silk fibre is obtained from the stem of a plant. Q. Cocoons are kept under sun. SOLUTION: (A) True (B) False : Spinning is the process of making yarn from fibres. d) The process of removing seeds from cotton is called ginning. A lot of plastic pollutes our environment. g) Polyester is a natural fibre. Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. g) False, polyester is not a natural fibre. Silk fibres are obtained from the silkworms which spin the fibres to form a cocoon in the pupa stage. Answer: True. (g) False; Polyester is a synthetic fibre. Question 2. (g) Polyester is a natural fibre. Silk fibre made of How silk is made from silkworm yak Weaving of yarn makes a piece of fabric. (d) Hair trap a lot of air, which is a poor conductor of heat. 12. The cocoons are collected and boiled in water to kill the silkworms. 3. 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