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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 7

Write about Ahimsa Silk. - Science

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Question

Write about Ahimsa Silk.

Answer in Brief
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Solution

  1. It is also known as Peace silk.
  2. In 1992, Kusuma Rajaiah, a Government officer from Andhra Pradesh state of India proposed ahimsa way of silk production for the making silks without killing the silkworm.
  3. It involves a humane method specifically letting the worms to hatch and then using the vacant cocoons.
  4. Traditional silk manufacturing methods involve boiling the cocoons of the silk worms and then sorting out the threads, which is used later in silk production.
  5. It has been supported by many people who are interested in the welfare of animals.
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Animal Fibre: Silk
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Chapter 5: Animals in Daily Life - Evaluation [Page 91]

APPEARS IN

Samacheer Kalvi Science - Term 3 [English] Class 7 TN Board
Chapter 5 Animals in Daily Life
Evaluation | Q VIII. 1. | Page 91

RELATED QUESTIONS

Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.


Out of the following, which are the two terms related to silk production?

Sericulture, floriculture, moriculture, apiculture and silviculture

Hints:

(1) Silk production involves cultivation of mulberry leaves and rearing silkworms.

(2) Scientific name of mulberry is Morus alba.


Match the words of Column I with those given in Column II:

Column I Column II
Scouring Yields silk fibres
Mulberry leaves Wool yielding animal
Yak Food of silk worm
Cocoon Reeling
  Cleaning sheared skin

A natural fibre obtained by boiling cocoons is called ______.


The cultivation and production of silk is known as ______.


______ is the strongest natural fibre.


Define – Sericulture


Silk fibre is obtained from ______.


Reeling of silk is ______.


State whether the following statement is True or False. If false, correct them.

Silkworms are caterpillars of silk moth.


Some words related to silk are jumbled up. Write them in their correct form.

WILSMORK


Steps for the production of silk are given below in a jumbled order. Arrange them in their proper sequence.

  1. Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
  2. Fibres are taken out from the cocoon.
  3. After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
  4. The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
  5. Female silk moths lay eggs.
  6. Cocoons are kept under the sun or boiled in water.

Paheli went to the market to buy sarees for her mother. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give reason for your answer.


Describe the life history of the silk moth with the help of figures of various stages.


The production of silk is called ______.


The larva of a silkworm is called ______.


Silk is the secretion of ______.


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