NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric
NCERT solutions for class 7 science chapter 3 Fibre to Fabric: Fibre that are obtained from plants like cotton, jute etc are discussed in NCERT class 6. Fibres are also obtained from animals like sheep, yak etc. The NCERT solutions for class 7 science chapter 3 fibre to fabric have explanations to the questions related to wool which is obtained from sheep and silk which is obtained from silkmoth. Class 7 science chapter fibre to fabric explains the step-wise process of getting wool from sheep and silk from the cocoon. At the end of the chapter, exercise questions are given. The NCERT solutions for class 7 science chapter 3 fibre to fabric discuss all these questions. The NCERT solutions covers all the questions of the NCERT science chapters and are helpful for exam preparation for other classes as well. The NCERT solutions for class 7 science chapter 3 fibre to fabric covers questions from all the topics of this chapter. Students are recommended to go through NCERT solutions for class 7 to score high marks in their examination.
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Here are the important topics of NCERT Class 7 Science Chapter 3:
3.1 Wool
Animals that yield wool
From fibres to wool
Processing fibres into wool
Life history of Silkmoth
3.2 Silk
From cocoon to silk
NCERT solutions for class 7 science chapter 2 : Solved Exercise Questions:
1. You must be familiar with the following nursery rhyme:
(i) ‘Baa baa black sheep, have you any wool.’
(a) Which parts of the black sheep have wool?
Answer:
(a) Black sheep have wool in the skin part.
1. You must be familiar with the following nursery rhymes:
(ii) ‘Mary had a little lamb, whose fleece was white as snow.’
(b) What is meant by the white fleece of the lamb?
Answer:
(b) White fleece means the hair (from where the wool is obtained) of lamb.
2. The silkworm is (a) a caterpillar, (b) a larva.
Answer:
The female silk moth lays eggs, from which hatch larvae which are called caterpillars or silkworms
Hence correct option: (iii) both a and b
4. What is meant by the following terms?
Answer:
Rearing means helping animals to grow includes grazing, feeding or breeding for some profit or other pleasure. It also helps animals from the problems of itching, odour, and waste.
4. What is meant by the following terms?
Answer:
The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing.
4. What is meant by the following terms?
Answer:
The rearing of silkworms for obtaining the spinned silk is called sericulture.
5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
Shearing, __________, sorting, __________, __________, _________.
Answer:
The complete steps for the processing of the wool.
Shearing, scouring , sorting, cleaning of burrs , dyeing , rolling .
Answer:
The two stages in the life history of the silk moth which are directly related to the production of silk are:
Silkworm and cocoon
7. Out of the following, which are the two terms related to silk production?
Sericulture, floriculture, moriculture, apiculture and silviculture.
Hints: (i) Silk production involves cultivation of mulberry leaves and rearing silkworms.
(ii) Scientific name of mulberry is Morus alba.
Answer:
Sericulture and moriculture are related to silk production.
Sericulture: Rearing of silkworms to obtain silk.
Moriculture: The science of cultivation of mulberry leaves for silk production.
Therefore, the silk industry is dependent on sericulture which in turn is dependent on moriculture. Hence, both are related to silk production.
8. Match the words of Column 1 with those given in Column 2:
1. Scouring (a) Yields silk fibres
2. Mulberry leaves (b) Wool yielding animal
Answer:
| Column 1 | Column 2 |
| 1. Scouring | (e) Cleaning sheared skin |
| 2. Mulberry leaves | (c) Food of silk worm |
| 3. Yak | (b) Wool yielding animal |
| 4. Cocoon | (a) Yields silk fibres |
Down Across
(D) 1: Thorough washing (A) 1: Keeps warm
2: Animal fibre 2: Its leaves are eaten by silkworms
3: Long thread like structure 3: Hatches from egg of moth.
Answer:
| Down | Across |
| 1. SCOUR | 1. WOOL |
| 2. SILK | 2. MULBERRY |
| 3. FIBRE | 3. CATERPILLAR |
Chapterwise NCERT solutions of class 7 science
NCERT Solutions for Class 7 Subject Wise
Benefits of NCERT solutions for class 7 science chapter 3 fibre to fabric:
- Solving homework questions are easy with the NCERT solutions for class 7 science chapter 3 fibre to fabric in hand.
- Going through the NCERT solutions of class 7 science chapter 3 fibre to fabric give clarity of the concepts studied in the chapter.
Frequently Asked Question (FAQs) - NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric
Question: Whether the Class 7 Science Chapter 3 Fibre to Fabric is useful in higher studies ?
Answer:
Yes, this chapter is very important for higher studies in the field of science and technology
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