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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 ______.

रिकाम्या जागा भरा

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

The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option


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.


The cultivation and production of silk is known as ______.


______ is the strongest natural fibre.


Peace silk was produced in the year ______.


Who invented the Ahimsa silk?


Write about any three uses of silk.


Write about Ahimsa Silk.


The silk fibre is obtained from


The term sericulture is used for


Reeling of silk is


State whether the following statements are 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.

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.

Complete the paragraph related to the life history of the silk moth by filling in the blanks.

The ____(a)___ silk moth lays ___(b)___, from which hatch ____(c)___ called ___(d)____ or ___(e)____. They grow in size and when the caterpillar is ready to enter the next stage of its life history called ___(f)____, it first weaves a covering to hold itself, which is known as ___(g)____.


Which of the following fibers is considered the strongest natural fiber?


The silk moth feed on ______.


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