NCERT Class VII Science Solution: Chapter 3-Fibre to Fabric Part 4

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Question 18:

Write a caption for each of the figures given as Figure (A - D).

  1. Result for Eggs of silk moth on mulberry leaves

    Eggs of Silk Moth on Mulberry Leaves

    Result for Eggs of silk moth on mulberry leaves

  2. Result for Silkworm

    Silkworm

    Result for Silkworm

  3. Result for Cocoon

    Cocoon

    Result for Cocoon

Result for Cocoon with developing moth

Cocoon with Developing Moth

Result for Cocoon with developing moth

Answer:

  1. Eggs of silk moth on mulberry leaves

  2. Silkworm

  3. Cocoon

  4. Cocoon with developing moth

Question 19:

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. Fibers arc 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 arc kept under the sun or boiled in water.

Answer:

Correct order - (E), (A), (D), (C), (F), (B)

Question 20:

A wholesale woolen fibre dealer gets the woolen fibre of different textures sorted for various purposes. Match the items in Column I with the woolen fibre in Column II.

Match the Column I and Column II. (Q)
Match the Column I and Column II. (q)

Column I

Column II

Pashmina shawl

Camel wool

Woolen carpet

Angora wool

Baby blanket

Kashmir goat

Woolen sweater

Sheep wool

Answer:

Match the Column I and Column II. (A)
Match the Column I and Column II. (a)

Column I

Column II

Pashmina shawl

iii Kashmir goat

Woolen carpet

i Camel wool

Baby blanket

ii Angora wool

Woolen sweater

iv Sheep wool