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प्रश्न
HOTS
Silk fiber is used to manufacture parachute. Why?
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उत्तर
- Silk is the strongest natural fibre.
- It is thin light in weight, strong.
- It is easly to peak and unfold.
- It is also fire resistant.
- It is dries quickly.
- It is also resistant to abrasion and chemicals.
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संबंधित प्रश्न
Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.
Define – Sericulture
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 statement is True or False. If false, correct them.
Silkworms are caterpillars of silk moth.
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.
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.
- Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
- Fibres are taken out from the cocoon.
- After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
- The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
- Female silk moths lay eggs.
- Cocoons are kept under the sun or boiled in water.
Complete the paragraph related to the life history of 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 production of silk is called ______.
The silk moth feed on ______.
The larva of a silkworm is called ______.
Silk is the secretion of ______.
