C. Answer in one or two sentences.
1. Why is shearing of sheep done in summers only?
2. What is the difference between plant and animal fibres?
3. Why does silk appear shiny?
4. Define sericulture.
5. What are the sheep fed on? How are they taken care of in winters?
6. What is reeling?
7. Why is raw silk hard? How is it made soft?
8. How is silk obtained from a cocoon?
Answers
Explanation:
Answer 1
because they can survive without their thick protective coat of protective hair in summer season. If shearing is done in winter season, the sheep would die due to the severe cold.
Answer 2
Plant fibres are extracted from plants. They are made of proteins. They are made up of cellulose. Animal fibres have comparatively lesser strength.
Answer 3
due to the triangular prism-like structure of the silk fibre, which allows silk cloth to refract incoming light at different angle.
Answer 4
the production of silk and the rearing of silkworms for this purpose.
Answer 5
Sorry I can't know
Answer 6
The process of taking out silk fibres from the cocoons for use as silk is called reeling.
Answer 7
Silk containing sericin is called raw silk. The gummy substance, affording protection during processing, is usually retained until the yarn or fabric stage and is removed by boiling the silk in soap and water, leaving it soft and lustrous, with weight reduced by as much as 30 percent
Answer 8
Cocoons are collected and kept under the sun, or boiled, or exposed to steam. This helps in separating out the silk fibres. The process by which silk thread is separated from the cocoon is called reeling the silk. Then, the spinning of silk fibres into threads is done.