KSEEB Solutions for Class 7 Science Chapter 3 Fibre to Fabric

In this chapter, we provide KSEEB Solutions for Class 7 Science Chapter 3 Fibre to Fabric medium students, Which will very helpful for every student in their exams. Students can download the latest KSEEB Solutions for Class 7 Science Chapter 3 Fibre to Fabric pdf, free KSEEB solutions for Class 7 Science Chapter 3 Fibre to Fabric pdf download. Now you will get step by step solution to each question.

Karnataka State Syllabus Class 7 Science Chapter 3 Fibre to Fabric

Class 7 Science Fibre to Fabric NCERT Textbook Questions and Answers

KSEEB Solutions For Class 7 Science Question 1.
You must be familiar with the following nursery rhymes:
(i) ‘Baa baa black sheep, have you any wool.’
(ii) ‘Mary had a little lamb, whose fleece was white as snow.’
Answer the following:
(a) Which parts of the black sheep have wool?
Answer:
The fine and soft under-hair that grows close to the skin of the sheep have wool.
(b) What is meant by the white fleece of the lamb?
Answer:
White fleece refers to the white hair of lamb that is used to make wool.

KSEEB Solutions For Class 7 Science Chapter 3 Question 2.
The silkworm is
(a) a caterpillar,
(b) a larva.
Choose the correct option.
(i) a
(ii) b
(iii) both a and b
(iv) neither a nor b.
Answer:
(iii) both a and b

KSEEB Solutions For Class 7 Question 3.
Which of the following does not yield wool?
(i) Yak
(ii) Camel
(iii) Goat
(iv) Woolly dog
Answer:
(iv) Woolly dog

Fibre To Fabric Class 7 Questions And Answers Question 4.
What is meant by the following terms?
Answer:
i) Rearing: Rearing is raising and taking care of livestock (eg. cows, buffaloes, goats, etc.); for commercial purposes. These animals are fed, provided shelters, and are bred for better yield like milk, meat, wool etc.

ii) Shearing: Once a sheep develops a thick coat of hair, it is shaved off to obtain wool. The process of cutting off the woolen fleece of sheep with a thin layer of skin is called shearing. It is done by the machines which remove the hair.

iii) Sericulture: The breeding and management of silkworms for the production of silk is known as sericulture. Different types of silk (eg. mulberry silk, Tassar silk, etc.) with different textures are obtained from different varieties of silk moths.

KSEEB Solutions For Class 7th Science Question 5.
Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
Answer:
Shearing, scouring, sorting, picking of burrs, dying of fibres, making of yarn.
KSEEB Solutions For 7th Class Science Chapter 3

KSEEB 7th Science Solutions Question 6.
Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.
Answer:
Silkworm ➝ Cocoon with pupa

KSEEB Solutions For 7th Class Science Question 7.
Out of the following, which are the two terms related to silk production? Sericulture, floriculture, moriculture, apiculture and silviculture.
Answer:
Hints:

  1. Silk production involves cultivation of mulberry leaves and rearing silkworms. Sericulture
  2. Scientific name of mulberry is Morns alba. Moriculture

KSEEB Solutions Class 7 Science Question 8.
Match the words of Column I with those given in Column II:

Column IColumn II
1. Scouring(a) Yields silk fibres
2. Mulberry leaves(b) Wool yielding animal
3. Yak(c) Food of silkworm
4. Cocoon(d) Reeling
 (e) Cleaning sheared skin

Answers:
1 – e
3 – c
3 – b
4 – a

KSEEB Solutions 7th Science Question 9.
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
Fibre To Fabric Class 7 Questions And Answers Chapter 3 KSEEB

Class 7 Science Fibre to Fabric Additional Important Questions and Answers

KSEEB Solutions For 7 Science Question 1.
How many types of fibres found in sheep?
Answer:
There are two types of fibres from sheep fleece.
They are

  1. the coarse beard hair
  2. the fine soft under-hair close to the skin.

KSEEB Solutions For 7th Science Question 2.
What are the sources of wool?
Answer:
Several breeds of sheep are found in different parts of our country. Sheep wool is very common. Yak wool from Tibet and Ladakh Mohair is obtained from angora goats, wool from goat hair, The underfur of Kashmiri goats are soft and it is woven into fine shawls called Pashmina shawls. The fur on the body of camels is also used as wool. Llama and Alpaca found in South America also yield wool.

7th Standard Science Textbook Karnataka Pdf Question 3.
What is meant by selective breeding?
Answer:
The process of selecting parents for obtaining special characters in their offspring such as soft under hair in sheep is termed as
selective breeding.

KSEEB Solutions Science Class 7 Question 4.
Where and how the sheep are reasred in India?
Answer:
In Jammu and Kashmir, Himachal Pradesh, Uttaranchal, Arunachal Pradesh, Sikkim, the plains of Haryana, Punjab, Rajasthan, Gujarat etc., the shepherds taking their herds of sheep for grazing. Sheep are herbivores and prefer grass and leaves. Apart from grazing, reares also feed them on a mixture of pulses, com, Jowar, oil cakes, etc., In winter Sheep are kept indoors and fed on leaves grain and dry footder.

Fibre To Fabric Question Answer Question 5.
Define Shearing.
Answer:
The fleece of the sheep along with a thin layer of skin is removed from its body is known as shearing.

KSEEB Class 7 Science Solutions Question 6.
What is meant by scouring?
Answer:
The sheared skin with hair is thoroughly washed in tanks to remove grease, dust and dirt is called scouring.

KSEEB Solutions 7th Standard Science Question 7.
What is sorting?
Answer:
Sorting is the process of separating the different textures of hair.

KSEEB Science Solutions For Class 7 Question 8.
Define Sericulture.
Answer:
The rearing of silkworms for obtaining silk is called as sericulture.

KSEEB Solution For Class 7 Science Question 9.
Name some Indian breeds of sheep.
Answer:

Name of breedQuality of woolState where found
1. LohiGood quality woolRajasthan, Punjab
2. Rampur bushairBrown fleeceUttar Pradesh, Himachal Pradesh
3. NaliCarpet woolRajasthan, Haryana, Punjab
4. BakharwalFor woolen shawlsJammu and Kashmir
5. MarwariCoarse woolGujarat
6. PatanwadiFor hosieryGujarat

Class 7 Science Chapter 3 Fibre To Fabric Notes Question 10.
Explain the life-history of silk moth.
Answer:
The female silk moth lays eggs from which hatch larvae which are called Caterpillars or silkworms. They grow in size and when the caterpillar is ready and enter pupa stage. The caterpillar secretes fibre made of a protein, soon the caterpillar completely covers itself by silk fibres and turns into pupa. This covering is known as Cocoon. The further development of the pupa into moth continues inside the cocoon. The silk yarn (thread) is obtained from the cocoon of the silk moth.

7th Standard Science Notes Karnataka State Syllabus Question 11.
What are the various types of silk?
Answer:
The types of silks are mulberry silk, tassar, silk, eri silk, mooga silk etc.,

KSEEB Solutions 7 Science Question 12.
Explain the processing of silk.
Answer:
A pile of cocoons is used for obtaining silk fibres. The Cocoons are kept under the sun or boiled or exposed to steam. The silk fibres separate out. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Reeling is done in special machines, which unwind the threads or fibres of silk from the cocoon. Silk fibres are then spun into silk threads, which are woven into silk cloth by weavers.

KSEEB Solutions For Class 7science Question 13.
Draw a neat diagram of the life-history of silk moth.
KSEEB Solutions For Class 7 Science Chapter 3

II. Fill in the blanks :

  1. Wool is obtained from the fleece (hair) of sheep or Yak.
  2. Parhmina shawls are woven from the soft wool of Kashmiri goat
  3. Yak wool is common in Tibet and Ladakh
  4. Mohair is obtained from angora goats.
  5. Llama and Alpaca found in South America.
  6. The rearing of silkworms for obtaining silk is called Sericulture.
  7. The soft silk yarn (thread) is as strong as the thread of steel.
  8. The most common silk moth is the mulberry silk moth.
  9. Sericulture or Culture of silkworms is a very Old occupation in India.
  10. China leads the world in silk production.
  11. Sometimes the sorters get infected by the bacterium anthrax.
  12. The risks faced by workers in any industry are called occupational hazards.
  13. The process of taking out threads from the cocoon is known as reeling the silk.
  14. Silk fibre is chemically a Protein.
  15. The scientific name of mulberry is Morus alba.
  16. The small fluffy fibres of wool are called burrs.

All Chapter KSEEB Solutions For Class 7 Science

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All Subject KSEEB Solutions For Class 7

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