Fibre to Fabric - Questions and Answers Class 7 Science Part 2 Chapter 1 Assam State Education Board Syllabus 2025-2026 Covered
This chapter explains the process of making fabric from natural and synthetic fibres. Below are the important questions and answers from NCERT & SCERT Assam Class 7 Science Chapter 1 - Fibre to Fabric, based on the Assam State Education Board syllabus for 2025-2026.
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Join Our WhatsAppIntroduction to Fibre to Fabric
- Fibres are thin strands used to make fabrics.
- Fibres can be natural (cotton, silk, wool) or synthetic (nylon, polyester).
- The process of making fabric involves steps like spinning, weaving, and knitting.
Class 7 Science Question Answer – Part 2
Below are the chapters of Class 7 Science Part 2. Click on the chapter name to access the respective question-and-answer content:
- Fibre to Fabric
- Respiration in Organisms
- Transportation in Animals and Plants
- Reproduction in Plants
- Electric Current and its Effects
- Light
- Water: A Precious Resource
- Forests: Our Lifeline
- Wastewater Story
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?
(b) What is meant by the white fleece of the lamb?
Ans:
a) Wool is obtained from the hairy fibres of the sheep.
b) White fleece of the lamb refers to the white colour of their fur.
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.
Solution:
(iii) both a and b
3. Which of the following does not yield wool?
(i) Yak (ii) Camel (iii) Goat (iv) Woolly dog
Solution:
The answer is (iv) Woolly dog
4. What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture
Solution:
i) Raising of domestic animals like sheep, goats, yak, cows and buffaloes for commercial purposes, such as for milk and fur is known as rearing.
ii) Shearing is a process of removal of animal hair by using machines similar to those used by barbers.
ii) Rearing of silkworms to get silk is known as Sericulture.
5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.
Shearing, __________, sorting, __________, __________, _________.
Ans:
Shearing, Scouring, sorting, picking of burrs, dying of fibres, making of yarn.
6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.
Ans:
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 the cultivation of mulberry leaves and rearing silkworms. (ii) Scientific name of mulberry is Morus alba.
Ans: Sericulture and moriculture
Class 7 Science Chapter 1 - Important Questions & Answers
Q1: What are fibres? Name two types of fibres.
Answer: Fibres are thin, thread-like strands used to make fabric. The two types of fibres are:
- Natural fibres (obtained from plants and animals, e.g., cotton, silk, wool).
- Synthetic fibres (man-made fibres, e.g., nylon, polyester).
Q2: How is cotton obtained?
Answer: Cotton is obtained from the cotton plant. The cotton balls are picked, seeds are removed by ginning, and then fibres are spun into thread.
Q3: What is the difference between natural and synthetic fibres?
Difference Between Natural and Synthetic Fibres
| Natural Fibres | Synthetic Fibres |
|---|---|
| Obtained from plants and animals. | Made by humans from chemicals. |
| Examples: Cotton, wool, silk. | Examples: Nylon, polyester, rayon. |
| Biodegradable and eco-friendly. | Non-biodegradable and less eco-friendly. |
Q4: What is spinning?
Answer: Spinning is the process of twisting cotton or wool fibres to make yarn, which is then used to make fabric.
Q5: What is the difference between weaving and knitting?
Difference Between Weaving and Knitting
| Weaving | Knitting |
|---|---|
| Two sets of yarn are interlaced to make fabric. | A single yarn is looped to form fabric. |
| Done using looms. | Done using needles or machines. |
| Examples: Cotton sarees, woolen blankets. | Examples: Woolen sweaters, socks. |
Q6: How is silk obtained?
Answer: Silk is obtained from the silkworm. The silkworm spins a cocoon made of silk fibre. The cocoon is boiled, and the silk thread is extracted and woven into fabric.
Q7: What are the uses of wool?
Answer: Wool is used for making:
- Warm clothes (sweaters, shawls, jackets).
- Blankets and carpets.
- Felt for industrial use.
Q8: What are the harmful effects of synthetic fibres?
Answer: Synthetic fibres:
- Are non-biodegradable and cause pollution.
- Catch fire easily.
- Can cause skin allergies.
FAQs on Fibre to Fabric
Q1: Why is cotton preferred for summer?
Answer: Cotton absorbs sweat and keeps the body cool in summer.
Q2: What is sericulture?
Answer: Sericulture is the process of rearing silkworms to produce silk.
Q3: How is wool classified?
Answer: Wool is classified based on the animal it comes from, such as sheep wool, goat wool (cashmere), and rabbit wool (angora).
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