CLASS 6
SUBJECT: Science
CHAPTER 3: Fibre to fabric
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| From Cotton Boll to Fabric |
Question 1: What is fibre?
Answer: Fibre is a thread like a strand from which yarn is made.
Question 2: What is yarn?
Answer: Yarn is a long continuous length of interlocked fibre which is woven or knitted for making garments.
Question 3: What is spinning?
Answer: Spinning is the process of twisting fibres by hand or using a machine, to obtain thread or yarn.
Question 4: What is weaving?
Answer: The process of making fabrics by crisscrossing two sets of yarn is called weaving.
Question 5: What is Retting?
Answer: The process of soaking jute stalks in water to let these rot to remove the sticky substance and it separates fibre is called retting.
Question 6: What is ginning?
Answer: The process of separating cotton fibre from its seeds is called ginning.
Question 7: What is knitting?
Answer: The process of making woollen fabrics by interlocking loops of the yarn is called knitting.
Question 8: Give some examples of plant fibres?
Answer: Cotton, jute, coir, silk cotton, hemp, flax
Question 9: What kind of soil is needed for growing cotton plant?
Answer: Black soil
Question 10: Why cotton clothes are preferred over synthetic fibre?
Answer: Because they are natural fibre and are biodegradable. They do not cause any pollution and are also good for our skin as they have natural ventilation.
Question 11: Name some items that are made from coir, jute, hemp, silk and cotton.
Answer:
Coir: ropes, floor covering, stuffing in mattresses and pillows
Jute: jute bags, hat, slipper, rope, mat and sack
Hemp: ropes, carpets, nets, clothes and paper.
Flax: Used to make a fabric linen, rope and quality paper.
Silk: a fabric, sarees, necktie
cotton: Used as stuffing in pillows, sleeping bags and life jackets.
Question 12: Which fibre has resistance to fungus and mites?
Answer: Coconut fibre
Question 13: Which fibre has antibacterial property?
Answer: Hemp.
Question 14: What is the chemical composition of plant fibre?
Answer: cellulose
Question 15: What is the chemical composition of animal fibre?
Answer: protein.
Question 16: Fill in the blanks.
(a) Jute is obtained by the process of retting from the stems of ___________ plant.
(b) _______________ are devices used to spin cotton fibres.
(c) A loose strand or rope of cotton fibres is called _______________.
(d) Silk is obtained from the _______________ of the silkworms.
(e) _______________ cotton is used as an absorbent in hospitals.
(f) In olden days, spinning was done using _______________.
(g) _______________ was the first man-made fibre.
Answer:
(a) patsun
(b) Looms
(c) silver
(d) cocoon
(e) Sterilised
(f) Charkha
(g) Rayon
Question 17: Write any three characteristics of the cotton plant.
Answer:
(i) Cotton requires little rainfall at the ripening of seeds.
(ii) These plants are grown in black soil.
(iii) Cotton plants are bushy and are 1-3 metres tall.
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