Study Materials: ncert solutions

Our ncert solutions for Solutions 3. Fibre to Fabric - Long Answered Questions | Class 7 Science - Toppers Study is the best material for English Medium students cbse board and other state boards students.

 

Solutions ⇒ Class 7th ⇒ Science ⇒ 3. Fibre to Fabric

Solutions 3. Fibre to Fabric - Long Answered Questions | Class 7 Science - Toppers Study

Topper Study classes prepares ncert solutions on practical base problems and comes out with the best result that helps the students and teachers as well as tutors and so many ecademic coaching classes that they need in practical life. Our ncert solutions for Solutions 3. Fibre to Fabric - Long Answered Questions | Class 7 Science - Toppers Study is the best material for English Medium students cbse board and other state boards students.

3. Fibre to Fabric

| Long Answered Questions |

Solutions 3. Fibre to Fabric - Long Answered Questions | Class 7 Science - Toppers Study


Long Answered Questions: 


Ques1: Name the animals those yield wool?
Ans: (i) Angora goat

(ii) Goat

(iii) Sheep

(iv) Camel

(v) yak

(vi) Llama

(vii) Alpaca 

Ques8: Write the steps of obtaining wool. 
Ans: There are six 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.

Ques3: write the life history of the silk moth.
Ans: The female silk moth lays eggs, from which hatch larvae which are called caterpillars or silkworm. They grow into pupa. It first weaves a net to hold itself is known as cocoon. Then they swing and move during these movement they secrete fibre made of a protein which hardens on exposure to air and becomes silk fibre. 

Ques4: Make sketches of the life history of the silk moth. 
Ans: 

Select Your CBSE Classes

Important Study materials for classes 06, 07, 08,09,10, 11 and 12. Like CBSE Notes, Notes for Science, Notes for maths, Notes for Social Science, Notes for Accountancy, Notes for Economics, Notes for political Science, Noes for History, Notes For Bussiness Study, Physical Educations, Sample Papers, Test Papers, Mock Test Papers, Support Materials and Books.

 

 

Mathematics Class - 11th

NCERT Maths book for CBSE Students.

books

Study Materials List:

Solutions ⇒ Class 7th ⇒ Science
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

Topper's Study

New Books