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