4. Name three Indian breeds of sheep that give wool.
5. Name the stages in the life cycle of a silk moth.
6. Name the place where silk was first discovered.
E. Answer each of the following questions in few sentences.
1. List any three health hazards associated with the production of wool.
2. List any three health hazards associated with the production of silk.
3. Differentiate between natural fibres and synthetic fibres.
4. Define the following terms:
(a) Sorting
(b) Scouring
(c) Moulting
(d) Reel
55 What is silk? Write any three properties of silk.
6. What is wool? Write any three properties of wool.
7. What do you mean by breeding of sheep? Why is it done?
8. Name any four types of silk produced in India. Where are they obtained fro
F. Answer each of the following questions in detail.
1. Name any four wool yielding animals other than sheep. Also describe the qua
produced by each of them.
plein the steps involved in obtaining silk from the silk moth.
with diagram, the life cycle of a silk moth.
e steps involved in the production of wool
Answers
Answer:
4. Jaisalmeri, Jalauni, Kher
5. Egg- Caterpillar/larva/silkworm- Pupa/cocoon- Silk Moth
6. Sites of Yangshao culture in Xia County, Shanxi
E.
1. Asthma, bronchitis and hepatitis
2. Backaches, respiratory problems and Sorter's Disease which is caused by the bacteria named Anthrax.
3.All fabrics can be characterized as either natural or synthetic fibers (or a blend of the two). Both types have pros and cons; natural fibers come from plants and animals, while synthetic fibers are made from chemical compounds, and each is valued in the textile industry for different reasons.
4 (a). The first process at the mill is sorting. The fleece is sorted into grades by individuals who have developed a keen sense of touch. They sort the fibers according to fineness, length, and color. Each wool product is made from a different type of fiber, and the sorter divides the fleece accordingly.
(b) Scouring is the process of preparing and washing a batch of raw sheep's wool to remove impurities such as grease, dirt and suint.
(c) The shedding or casting off of an outer layer or covering and the formation of its replacement is called Moulting.
(d) Silk reeling is the process by which a number of cocoon baves are reeled together to produce a single thread. This is achieved by unwinding filaments collectively from a group of cooked cocoons at one end in a warm water bath and winding the resultant thread onto a fast moving reel.
5. Silk is a type of clothing made using Silkworms. The three properties of silk are:- Low density, good insulation and lustrous.
6. Wool is a type of clothing made using sheep and other wool yielding animals like yak, angora goat etc. They are wore in winters and are shiny.
7. Breeding of sheep means taking care of sheep for wool. It is done to get good quality wool for clothing and other economic purposes.
8. Four types of silk found in India are:- Mooga, Tasar, Eri and Mulberry.
F.
1. Other than sheep, wool can be obtained from camels, goats, rabbits and yaks.
2. Sericulture- Reeling
3. The different processes involved in wool production are shearing, scouring, grading, dyeing, and drying. The process of removal of the fleece from an animal is called shearing.
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