Question

1. Why do the wool fibres have a greater bulk as compared to other fibres?
2. Name two substances removed from raw wool, before manufacturing the yarn.
3. Name the domesticated moth whose larva produces silk.
4. Name the plant on which silk larva feeds.
5. Why are the silk fibres lustrous?
6. Name the person responsible for the discovery of silk.
7. Why are the harvested silk cocoons boiled? Give two reasons.
8. Name and describe any two types of silk threads used in the making of silk cloth.
9. Name the strongest variety of silk. State whether the variety you have named is wild silk or
domesticated silk.
10. Give two uses of silk, other than for making dresses.​

Answer 1

Answer:

• wool scaling and crimp make it easier to spin the fleece of helping individuals fibre attach to each other so they stay together because crimp wool fabric have great bulk than other textile and they hold air which cause the fabric to retain heat.
• suitable detergent and cleaned for lanolin oil.
• lepidoptera and caterpillar.
• mulberry leaves.
• the shimmering appeareance of silk produce different colours.