Extra 30 short questions and answers from the CBSE Class 6 Science chapter:3 "Fibre and Fabric."
1. What are fibres?
✅ Answer: Fibres are thin, thread-like strands that are used to make yarn and fabrics. They can be natural (cotton, wool, silk, jute) or synthetic (nylon, polyester).
2. What are the two types of fibres? Give examples.
✅ Answer:
Natural fibres
– Obtained from plants and animals (e.g., cotton, wool, silk, jute).
Synthetic fibres
– Made from chemicals (e.g., nylon, polyester, acrylic).
3. What is cotton, and how is it obtained?
✅ Answer: Cotton is a natural plant fibre obtained from the cotton plant’s seed hairs. The process of separating cotton fibres from seeds is called ginning.
4. Name two states in India where cotton is grown.
✅ Answer: Gujarat and Maharashtra are major cotton-producing states in India.
5. What is jute, and where is it grown?
✅ Answer: Jute is a natural fibre obtained from the stem of the jute plant. It is mainly grown in West Bengal, Assam, and Bihar.
6. What is ginning?
✅ Answer: Ginning is the process of removing cotton fibres from the seeds after harvesting the cotton crop.
7. What is retting?
✅ Answer: Retting is the process of soaking jute stems in water to separate the fibres.
8. How is wool obtained?
✅ Answer: Wool is obtained from the fleece (hair) of animals such as sheep, goats, and alpacas. The process of cutting the fleece is called shearing.
9. What is silk, and how is it obtained?
✅ Answer: Silk is a natural fibre produced by silkworms. It is obtained by collecting and processing silkworm cocoons.
10. What are synthetic fibres? Give two examples.
✅ Answer: Synthetic fibres are man-made fibres produced from chemicals. Examples include nylon and polyester.
11. What is the process of making yarn from fibres called?
✅ Answer: The process of making yarn from fibres is called spinning.
12. What is weaving?
✅ Answer: Weaving is the process of interlacing two sets of yarns to make fabric using a loom.
13. What is knitting?
✅ Answer: Knitting is the process of making fabric by interlocking loops of a single yarn.
14. What is sericulture?
✅ Answer: Sericulture is the process of rearing silkworms to obtain silk fibres.
15. What are some common uses of jute?
✅ Answer: Jute is used for making bags, ropes, mats, and carpets.
16. Why do we wear cotton clothes in summer?
✅ Answer: Cotton clothes absorb sweat and allow air circulation, keeping us cool.
17. Why do we wear woollen clothes in winter?
✅ Answer: Wool traps air, which acts as an insulator and keeps the body warm.
18. Why is silk considered a luxurious fibre?
✅ Answer: Silk is soft, shiny, and expensive, making it a luxurious fibre. It is used to make sarees, dresses, and scarves.
19. How is polyester different from cotton?
✅ Answer:
Polyester
is a
synthetic fibre
made from chemicals, does not absorb moisture, and is wrinkle-resistant.
Cotton
is a
natural fibre
obtained from plants, absorbs moisture, and wrinkles easily.
20. What are the steps involved in making fabric from fibres?
✅ Answer:
Fibre extraction
(e.g., ginning for cotton, retting for jute).
Spinning
– Making yarn from fibres.
Weaving/Knitting
– Making fabric from yarn.
Finishing
– Processing fabric for use.
21. What are the advantages of synthetic fibres?
✅ Answer:
They are
strong and durable.
They are
wrinkle-resistant.
They dry
quickly
and do not absorb much water.
They are
cheaper
than natural fibres.
22. Why do synthetic fibres melt easily?
✅ Answer: Synthetic fibres are made from plastic-like materials that melt when heated instead of burning.
23. Why is jute preferred for making sacks and ropes?
✅ Answer: Jute is strong, rough, and durable, making it ideal for bags and ropes.
24. What is the difference between natural and synthetic fibres?
✅ Answer:
Natural fibres
come from plants or animals (e.g., cotton, wool, silk).
Synthetic fibres
are man-made from chemicals (e.g., nylon, polyester).
25. Why do we prefer woollen clothes in cold regions?
✅ Answer: Wool traps air and acts as an insulator, keeping the body warm in cold regions.
26. Name any two synthetic fibres and their uses.
✅ Answer:
Nylon
– Used in ropes, parachutes, and stockings.
Polyester
– Used in clothes, bedsheets, and curtains.
27. What is the importance of fibres in our daily life?
✅ Answer:
Fibres help in making
clothing
and
household items.
They are used in making
bags, ropes, carpets, and nets.
They are essential for
industrial purposes
(e.g., tyre cords, tents).
28. Why should synthetic clothes not be worn in the kitchen?
✅ Answer: Synthetic clothes like polyester and nylon catch fire easily and melt, causing burns.
29. Why does cotton feel soft and comfortable on the skin?
✅ Answer: Cotton fibres are light, breathable, and absorb sweat, making them soft and comfortable.
30. Why do we blend natural and synthetic fibres?
✅ Answer:
To make
stronger, more durable fabrics.
To reduce
wrinkling and shrinkage.
To make fabrics
cheaper and easier to maintain.
