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NCERT solutions Science Textbook for Class 7 chapter 3 Fibre to Fabric

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Chapter 3 - Fibre to Fabric

Pages 32 - 323

You must be familiar with the given nursery rhymes

Baa baa black sheep, have you any wool.

Answer the following:

Which parts of the black sheep have wool?

Q 1.1 | Page 32 |

You must be familiar with the following nursery rhymes:

Mary had a little lamb, whose fleece was white as snow

Answer the following:

What is meant by the white fleece of the lamb?

Q 1.2 | Page 32 |

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

1) a

2) b

3) both and b

4) neither a nor b

Q 2 | Page 32 |

Which of the following does not yield wool?

(1) Yak

(2) Camel

(3) Goat

(4) Woolly dog

Q 3 | Page 32 |

What is meant by term Rearing?

Q 4.1 | Page 32 |

What is meant by term Shearing ?

Q 4.2 | Page 32 |

What is meant by term Sericulture?

Q 4.3 | Page 323 |

Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them

Shearing, __________, sorting, ______________________________

Q 5 | Page 32 |

Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

Q 6 | Page 32 |

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.

Q 7 | Page 32 |

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
Q 8 | Page 32 |

Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.

Down

(D) 1: Thorough washing

2 : Animal fibre

3 : Long thread like structure

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3 : Hatches from egg of moth

Q 9 | Page 33 |

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