NCERT Solutions For Class 7 Science Chapter 3

NCERT Solutions Class 7 Science Fiber to Fabric

Ncert Solutions For Class 7 Science Chapter 3 PDF Download

NCERT Solutions for Class 7 Science chapter 3 Fiber to Fabric are prepared by the subject professionals to help students in their studies. For easy access, we at BYJU’S provide free class 7 Science Fiber to Fabric NCERT solutions in PDF format. Students can either practice these questions online or can also download these pdf files and use it for their class assignments.

The solutions provides detailed explanations and other information related to the chapter along with the different types of solved questions including objective, short and long types of questions from exam point of view. This chapter 3 comprises of different topics. Like –

  • Fibres
  • Types of fibres
  • Silk
  • Wool
  • Sources of wool
  • How to process wool fibre?
  1. Fibres – Fine, long, filaments or continuous threads are acquired for the animals and plants. There are 2 types of fibre. They are – Plant fibre and Animal fibre.
  2. Silk – Silk and woollen are the usual fibres obtained from animals. Silk is obtained from the silkworms whilst, wool is obtained from the goat, sheep and yak. Therefore, wool and silk are animal fibres.
  3. Animal fibre – Hair of alpaca, llama and camel are handled and processed to produce the wool. Generally, in India, sheep are nurtured and reared for getting the wool. The hair of the sheep is shaved off from the body, cleansed, dried, sorted, colored, gyrated and woven to get the wool.
  4. Sources of wool – Wool is acquired from yak (Ladakh and Tibet), Angora goat, sheep, goat, camel, Alpaca etc.,
  1. Is silkworm a larva or a caterpillar? Or both?

Ans.  Both

 

  1. From the following animals, choose the one not suitable for wool extraction.

1- Goat  

2-Camel

3- Yak

4- Wooly Dog

Ans.  Wooly Dog

 

  1. Write a short note on the following.

(a) Rearing (b) Shearing (c) Sericulture

Ans.

(a) Rearing: It is a process of breeding, feeding and providing medical care to useful animals. These animals are kept since they produce one or more useful products for the human beings.

(b) Shearing: It is the process of removing fleece from the sheep along with a thin layer of skin.

(c) Sericulture: It is the rearing of silkworms to obtain silk is known as sericulture.

 

  1.  Draw a sketch of the  2 stages involved in the life history of a silk moth which is directly involved in the production of silk.

Ans.

4.1

4.2

  1. In the following, identify the 2 terms related to silk production:

Sericulture, floriculture apiculture, moriculture, and silviculture.

Ans. Sericulture, Moriculture.

  1. Match the following  
Column I Column II
1. Scouring

2. Mulberry Leaves

3. Yak

4. Cocoon

(a) Yields silk fiber

(b) Wool yielding animal

(c) Food of silkworm

(d) Reeling

(e) Cleaning sheared skin

 

Ans.

Column I Column II
1. Scouring

2. Mulberry Leaves

3. Yak

4. Cocoon

(e) Cleaning sheared skin

(c) Food of silkworm

(b) Wool yielding animal

(a) Yields silk fiber

 

  1. The below crossword puzzle is from this chapter. Use the hints.

puzz

 

  1. You must be familiar with the following rhymes:

(a) ’Baa baa black sheep, have you any wool.’

(b) ‘Mary had a little lamb, whose fleece was white as snow.’

Answer the following:

(i) Which part of the black sheep has wool?

(ii) What is meant by the white fleece of the lamb?

Ans:

(i) Black sheep has wool on its hairy skin called fleece.

(ii) White fleece of the lamb refers to the white colored hairy skin.

 

  1. Fill the missing steps in the sequence of steps involved in silk processing.

Shearing, _______, Sorting, _______, ________.

Ans. Shearing, scouring, sorting, picking out of burrs, colouring. rolling.

Hence, this is a small introduction of the NCERT Solutions for Class 7 Science chapter 3. We at BYJU’S provide solutions for all the classes in a simple and and an easier way. BYJU’S provides solutions for all the classes and chapters in brief. For more NCERT solutions, study materials of all the subjects and of all the classes visit BYJU’S or download the app for more information and learning experience.

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