Class 7 3. Fibre to Fabric The steps of obtaining wool : NCERT Book Solutions
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams.
NCERT Solutions
All chapters of ncert books Science 3. Fibre to Fabric The steps of obtaining wool is solved by exercise and chapterwise for class 7 with questions answers also with chapter review sections which helps the students who preparing for UPSC and other competitive exams and entrance exams.
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams. - 3. Fibre to Fabric - The steps of obtaining wool : NCERT Book Solutions for class 7th. All solutions and extra or additional solved questions for 3. Fibre to Fabric : The steps of obtaining wool Science class 7th:English Medium NCERT Book Solutions. Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams.
3. Fibre to Fabric : The steps of obtaining wool Science class 7th:English Medium NCERT Book Solutions
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams. - 3. Fibre to Fabric - The steps of obtaining wool : NCERT Book Solutions for class 7th. All solutions and extra or additional solved questions for 3. Fibre to Fabric : The steps of obtaining wool Science class 7th:English Medium NCERT Book Solutions.
Class 7 3. Fibre to Fabric The steps of obtaining wool : NCERT Book Solutions
NCERT Books Subjects for class 7th Hindi Medium
3. Fibre to Fabric
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams.
The steps of obtaining wool
The steps of obtaining wool :
(i) Shearing: The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing. In this process the hairs are shaved off. The hair provide woolen fibres.
(ii) Scouring : The sheared skin with hair thoroughly washed in tanks to remove grease, dust and dirt. This is called scouring.
(iii) Sorting: The hairy skin is sent to a factory where hair of different textures are separated. This ia called sorting.
(iv) Cleaning of Burrs: The small fluffy fibres, called burrs, are picked out from the hair. The fibres are scoured again and dried. This is the wool ready to be drawn into fibres.
(v) Dyeing : The dyeing in various colours. as the natural fleece of sheep and goats is black, brown or white.
(vi) Rolling into Yarn : The fibres are straightened, combed and rolled into yarn. The longer fibres are made into wool for sweaters and the
shorter fibres are spun and woven into woollen cloth.
Occupational hazard : Sorter's job sometimes workers get infected by a bacterium, anthrax, which causes a fatal blood disease called sorter’s disease. Such risks faced by workers in any industry are called occupational hazards.
Timing to remove hair :
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams.
See other sub-topics of this chapter:
1. Natural Fibres and Synthetic Fibres
2. The steps of obtaining wool
Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams. - 3. Fibre to Fabric - The steps of obtaining wool : NCERT Book Solutions for class 7th. All solutions and extra or additional solved questions for 3. Fibre to Fabric : The steps of obtaining wool Science class 7th:English Medium NCERT Book Solutions. Class 7 chapter 3. Fibre to Fabric ncert exercise questions and textual questions with solution for board exams and term 1 and term 2 exams.
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Science Chapter List
1. Nutrition in Plants
2. Nutrition in Animals
3. Fibre to Fabric
4. Heat
5. Acids, Bases and Salts
6. Physical and Chemical Changes
7. Weather, Climate and Adaptations of Animals to Climate
8. Winds, Storms and Cyclones
9. Soil
10. Respiration in Organisms
11. Transportation in Animals and Plants
12. Reproduction in Plants
13. Motion and Time
14. Electric Current and its Effects
15. Light
16. Water : A Precious Resource
17. Forests: Our Lifeline
18. Wastewater Story
