3. Fibre to Fabric Class 7 Science [LATEST] Solutions Long Answered Questions in English - CBSE Study
NCERT Solutions for Class 7 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 3. Fibre to Fabric with detailed explanations and step-by-step answers for better exam preparation. Each Long Answered Questions is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 7 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 7 English Medium Science All Chapters:
3. Fibre to Fabric
4. Long Answered Questions
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:
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