(A) Eggs of silk moth on mulberry leaves
(B) Silkworm
(C) Cocoon
(D) Cocoon with developing moth.

Wool is used for making fabrics, shawls, blankets, carpets, felt and upholstery. Wool felt is used to cover piano hammers. It is also used to absorb noise in heavy industry and stereo-speakers.

Animals from which we get wool bear a thick coat of hair on their bodies. This is because air is a poor conductor of heat. The thick coat of hair traps a lot of air, there by creating an insulating barrier. Thus thick coat of hair shield these animals from cold.

Silk fibres are derived from silkworms and are therefore called animal fibres. The scientific name for the silk producing moth (species) is Bambyx mari. It is one of the most beautiful moth.

Woollen sweaters contain air trapped between them. Air, being a bad conductor of heat, does not allow the body heat to flow outward. On the other hand, cotton garments cannot trap air between them and so do not provide any insulation and thus cannot keep up as warm as woollen sweaters.

The silk yarn is obtained form the cocoon of the silk moth. There is a variety of silk moths which look very different from one another and the silk yarn they yield is different in texture like coarse, smooth and shiny etc. Thus tassar silk, mooga silk and kosa silk are obtained from cocoons spun by different types of moths. The common silk moth is the mulberry silk moth. The cocoon of this moth yield soft, lustrous and elastic silk fibre.

Cocoons of silk moth are used to obtain the silk fibres. These cocoons are kept under the sun or boiled or exposed to steam. The silk fibres separate out. This process of obtaining wool from the cocoons is called reeling the silk. Reeling is done in special machines

Various kinds of animals are :
(i) Yak: Wool is common in Tibet and Ladakh.
(ii) Angora goat: They are used to obtain Angora wool. They are found in hilly regions such as Jammu and Kashmir.
(iii) Kashmiri goats: They are used to obtain under fur.
(iv) Camel: It also provides fur.
(iv) Llama and Alpaca: They are found in South America and also yield wool.

Sheep have two types of fibres: (i) the coarse beard hair and (ii)the fine soft under hair close to the skin.

Protein.

The stage next to caterpillar in the life cycle of silk moth is called pupa.

The first step is shearing then scouring.

Silk.

Kashmiri goats.

Wool yielding animals are sheep, yak, llama, alpaca, angora goat, angora rabbit and camel.