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

______ is the strongest natural fibre. - Science

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Question

______ is the strongest natural fibre.

Fill in the Blanks

Solution

Silk is the strongest natural fibre.

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Animal Fibre: Silk
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Chapter 5: Animals in Daily Life - Evaluation [Page 90]

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Samacheer Kalvi Science - Term 3 [English] Class 7 TN Board
Chapter 5 Animals in Daily Life
Evaluation | Q II. 4. | Page 90

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.


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 ______.


HOTS

Silk fiber is used to manufacture parachute. Why?


Which of the following is not a type of silk?


The silk fibre is obtained from


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


The term sericulture is used for


Reeling of silk is


State whether the following statements are True or False. If false, correct them.

Silkworms are caterpillars of silk moths.


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.

TURECULRISE


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)____.


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


India stands ______ in silk production in the world.


The production of silk is called ______.


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