How is wool obtained from sheep?

Wool is obtained from the fleece or hairy covering present on the body of sheep and certain other animals. The process begins with shearing, where the fleece is carefully removed using special tools. After removal, the fleece is cleaned thoroughly in a process called scouring to remove dirt, grease, and dust. The fibres are then sorted according to texture and quality. After sorting, they are dyed and spun into woollen yarn. This yarn is later used for making sweaters, shawls, blankets, and other woollen clothes. The chapter explains every step clearly to help students understand wool processing easily.

What is sericulture and why is it important?

Sericulture is the process of rearing silkworms for the production of silk. Silkworms are raised carefully and fed mainly on mulberry leaves. During their life cycle, the larvae spin cocoons made of silk fibres. These fibres are collected and processed to make silk yarn. Sericulture is important because it provides silk, which is widely used for making clothes, sarees, and decorative materials. It also supports the livelihood of many farmers and workers involved in silk production. The chapter helps students understand the scientific and economic importance of silk farming and how natural fibres are useful in daily life.

NCERT Exemplar Solution for Class 7 Science Chapter 3 Fibre to Fabric

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NCERT Exemplar Solution for Class 7 Science Chapter-3 Fibre to Fabric

Clothes are an essential part of human life, and the journey from natural fibres to finished fabric is both interesting and educational. Chapter-3 Fibre to Fabric explains how wool and silk are obtained, processed, and converted into usable fabrics. The chapter introduces students to animal fibres, the life cycle of silkworms, and the methods used to obtain wool from sheep and other animals. The NCERT Exemplar Solution for Class 7 Science helps learners understand scientific concepts related to fibres in a simple and practical way. Through detailed explanations and application-based questions, the NCERT Exemplar Solution for class 7 improves conceptual clarity and logical thinking. These NCERT solutions for class 7 are highly useful for exam preparation because they explain each topic with examples, diagrams, and real-life connections that make science more engaging and easier to remember.

Find the Exercises PDF of NCERT Exemplar Solution for Class 7 Science Chapter-3 Fibre to Fabric

Wool: Sources and Processing

Wool is one of the most commonly used natural fibres obtained from animals. This chapter explains that wool mainly comes from sheep, although animals like goats, yaks, camels, rabbits, and llamas also provide wool. The thick hair covering the bodies of these animals protects them from cold weather. This hair is known as fleece and is used to make woollen clothes.

Students learn about different breeds of sheep found in various regions and how climate affects the quality of wool. The chapter also explains the process involved in converting fleece into wool. The first step is shearing, where the fleece is removed from the animal’s body. After this, scouring is done to wash and clean the fibres. The cleaned fibres are sorted, dyed, and spun into yarn. The NCERT Exemplar Solution provide clear explanations of each stage involved in wool processing. Questions based on sequencing, reasoning, and scientific observation help students understand the practical aspects of textile production. This topic also increases awareness about animal care and the importance of proper handling during wool production.

Silk Production and Life Cycle of Silkworms

Silk is another important natural fibre discussed in this chapter. Silk is known for its softness, shine, and strength. It is obtained from the cocoon of silkworms through a process called sericulture. The chapter explains the complete life cycle of silkworms, beginning from eggs to caterpillars, cocoons, and finally adult moths. Silkworms feed mainly on mulberry leaves, which provide the nutrients necessary for their growth. As the caterpillar grows, it secretes silk fibres around itself to form a cocoon. These silk threads are then collected carefully to produce silk yarn. Students also learn about different varieties of silk obtained from various types of silkworms.

The exemplar questions help learners understand how silk production takes place on a large scale. Students are encouraged to identify stages of the life cycle and understand the scientific importance of insect-based fibre production. This topic develops curiosity about natural resources and traditional industries. The chapter also highlights the role of farmers and workers involved in sericulture. It introduces students to the economic importance of silk production and its contribution to rural employment. Such real-life examples make the chapter more meaningful and informative.

Natural Fibres and Their Importance

Fibre to Fabric teaches students about the importance of natural fibres in everyday life. Wool and silk are biodegradable and environmentally friendly compared to many synthetic materials. These fibres are comfortable to wear and suitable for different climates. The chapter helps students understand how humans depend on animals and insects for useful products. It also explains the importance of careful processing to maintain fibre quality. Through activities and examples, students learn to identify different fibres and fabrics used in homes and industries.

The NCERT exemplar solutions improve analytical and scientific skills by including multiple-choice questions, fill-in-the-blanks, and descriptive exercises. These questions test understanding and help students prepare effectively for examinations. By practicing exemplar problems, learners gain confidence and improve their ability to explain scientific processes clearly. Another important concept discussed is animal welfare. Students are taught that animals should not be harmed unnecessarily during fibre extraction. This develops sensitivity and awareness about ethical treatment of living organisms.

Why NCERT Exemplar Solutions Are Helpful

The NCERT Exemplar Solution for Class 7 Science Chapter-3 Fibre to Fabric provides detailed answers and easy explanations that help students understand even complex topics comfortably. The solutions are designed according to the latest syllabus and encourage deeper learning rather than simple memorization. Regular practice of exemplar questions improves problem-solving abilities and helps students perform better in school exams. These solutions also strengthen the foundation for future science topics related to textiles, industries, and biology.

The language used in the solutions is simple, student-friendly, and engaging. Important concepts are explained step by step, making revision easier and more effective. Students can also improve their scientific vocabulary and understanding of natural resources through this chapter.