Chapter 3:-Animal Learning objective:- I can recognize different animal yielding . Competence:- Critical thinking Value:- Care My identity theme:- My community is my identity

I. Choose the correct Answer:- 1.Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Which of the following would be the right gift for her to buy? (a) Woollen shawl (b) scarf (c) Animal cap (d) Leather jacket 2. The rearing of silkworms for obtaining silk is called (a) cocoon (b) silk (c) sericulture (d) silviculture Explanation: Breeding and management of silkworms for obtaining silk is called as sericulture. 3. Which of the following is not a type of silk? (a) Mulberry silk (b) Tassar silk (c) Mooga silk (d) Moth silk Explanation: Mulbery silk, Tasar Silk and Mooga silk are the varieties of silk produced by different silk worms whereas Moth silk is not a variety of silk.

4. Silk fibre is obtained from

(a) fleece of sheep (b) ball (c) cocoon (d) shiny stalk Explanation: Silk is a fibre obtained from the cocoons of silkworms. 5. Wool fibre cannot be obtained from which of the following? (a) Goat (b) (c) (d) Moth II. Fill in the blanks in the following statements. 6. Silk and Wool fibres are obtained from animals. 7. Silk fibres come from cocoons of silk moth. 8. Wool yielding animals bear hair on their body. 9. Hair trap a lot of air, which is a poor conductor of heat. III. Answer the following questions:-

10. How do the hair of certain animals help in keeping their bodies warm? Ans) Hairs of bad conductor of heat hence they will not allow escape of heat from body which ensures their body kept warm.

11. Explain the phrase – “Unity is Strength” on the basis of the making of fabric from fibre? Ans) Fabric is made of thin hair like strand called as fibres. It is easy to break a fibre thread as it is fragile easy to break as well. On the other hand fabric is the accumulation of many fibre thread which are hard to break and needs enormous amount of energy to break fabric. Hence based on making of fabric from fibre it is said that unity is strength. 12. Write sequence of steps in the processing of wool. The steps involved in the wool production are as follows:- • Shearing:- Removing wool from an animal by scissors, hand blades or electric machines.

• Scouring:- Washing wool with water containing soap or detergent and small amount of alkalis like soda ash to remove dirt and grease. • Sorting:-The process by which the damaged or inferior wool is removed from fleece. • Grading:- The process of sorting the wool according to the length, color and texture of . • Carding:- Passing the wool fibers through a series of metal teeth to straighten them. • :- Joining thin fibers together by machines to form one strand of yarn. 13. Name any four wool-yielding animals? Ans) Sheep, angora goat, Kashmiri goat, llama gaot. 14. Name two types of fibres which form the hairy skin of the sheep. Ans) wool-fleece1)coarse bread hair 2) fine soft under hairs 15. Which animal material is used to weave fine, soft shawls called ?

Ans) Kashmiri goats

16. Where are the sheep kept in winters? Ans) Some sheep are kept in barns-mainly because the land locally is wet or lacking in feed. 17. Name the most common silk moth. Ans) Mulberry silk moth 18. How many eggs can a female silk moth lay? Ans)A female silkworm moth will lay 200 to 500 golden -yellow eggs . If the eggs are fertile they will turn into black. 19.What treatment is given to the cocoons to separate out the threads? Ans) The silk fibers are separate out. The process of taking out threads from the cocoon for use a silk is called Realing the silk. 20. The silk obtain from Mulberry skin moth is more popular. Why? Ans) the most common silk is the mulberry silk moth. The silk fiber obtained from cocoon of the moth is soft, lusturous and elastic and can be dyed in beautiful colors. This is because it is most popular silk. 21. How silk worms are reared? Ans) Rearing of silkworms is used to produce raw silk, Which is called sericulture .In the process silkworms are reared at appropriate temperature and humidity to get silk threads from cocoons. 22. Briefly explain the life history of Silk moth, with the help of diagram. Ans) Life cycle of silk moth:-

1. Egg:- Egg is the first stage of silkworm’s life cycle. The female moth lays its eggs during the summer. The egg hatches in spring. 2. Larva:- The eggs hatch into larvae or caterpillars, Which feed on tender mulberry leaves. This stage Lasts for about 27 days, and during this time, the larva shed their skin four times. The process of shedding the skin is known as Moulting. 3. Pupa:- The caterpillar spins fine filament around it in layers to form a Cocoon. The Silkworm takes there to seven days to prepare the cocoon. The silk Worm takes three to seven days to prepare the cocoon. Silk thread is obtained from the cocoon. 4. Silk moth:- The pupa changes into moth, Which comes out of the cocoon. The female adults lay eggs and the life cycle continues.