L. Answer in one or two sentences:
1. Name the three types of fibres.
2. What do you observe when you burn artificial fibre (Nylon) and natural fibre (cotton)?
3. Give other examples from which wool can be obtained besides sheep.
4.Where does silk is originated initially?
5. What is sericulture?
Answers
Answer:
1.Natural fibres are a collection of tiny threads obtained from plants and animals. For Ex: cotton, wool ,Silk ,flax, jute.
2.(Nylon/Polyester/Acrylic): Ignites and burns quickly and can continue to burn after a flame is removed—exercise caution. Fiber may shrink from the flame, melt, and can drip (DANGER) leaving a hard plastic-like bead. Burning these fabrics will produce black smoke and hazardous fumes.
Cotton: Ignites on contact with flames; burns quickly and leaves a yellowish to orange afterglow when put out. Does not melt. It has the odor of burning paper, leaves, or wood. The residue is a fine, feathery, gray ash.
3.Other than sheep, wool can be obtained from the animals like camels, goats and rabbits. The Alpaca, a camel breed, gives fibres which are light weight, soft and shiny in nature.
4.The production of silk originates in China in the Neolithic (Yangshao culture, 4th millennium BC). Silk remained confined to China until the Silk Road opened at some point during the later half of the 1st millennium BC.
5.Sericulture, or silk farming, is the cultivation or rearing of silkworms to produce silk.
Explanation:
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