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तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ७

A natural fibre obtained by boiling cocoons is called ______. - Science

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प्रश्न

A natural fibre obtained by boiling cocoons is called ______.

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उत्तर

A natural fibre obtained by boiling cocoons is called silk.

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Animal Fibre: Silk
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Polymer Chemistry - Evaluation [पृष्ठ ६२]

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सामाचीर कलवी Science - Term 3 [English] Class 7 TN Board
पाठ 3 Polymer Chemistry
Evaluation | Q II. 5. | पृष्ठ ६२

संबंधित प्रश्‍न

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

Peace silk was produced in the year ______.


Write about any three uses of silk.


Which of the following is not a type of silk?


The general process that takes place at a sheep shearing shed is ______.


Reeling of silk is ______.


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

The rearing of silkworms for obtaining silk is called silviculture.


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

TURECULRISE


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

WILSMORK


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

BELMURRY


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.


______ are boiled to get the silk.


The production of silk is called ______.


The silk moth feed on ______.


Silk is the secretion of ______.


List a few characteristic features of silk.


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