Fibre to Fabric | Science 6th | Chapter 3 | Questions and Answers

JANDKNCERT | Science 6^th |

Fibre to Fabric | Science 6th | Chapter 3 | Questions and Answers

 

Chapter 3: Fibre to Fabric

 

Introduction

In Chapter 2, we learnt about the Components of Food. We learnt about the major nutrients of food like carbohydrates, proteins, fats, vitamins, and minerals. We also learnt about the Mid-day-meal programme and the diseases caused due to the deficiency of different nutrients in our body.

In this chapter, you will learn about the Fibre to Fabric. The following points will help you to understand this chapter easily.

•     Fabrics are made from yarns, which in turn are made from fibres.

•     Fibres are either natural or synthetic. Cotton, wool, silk and jute are some natural fibres, while nylon and polyester are some examples of synthetic fibres.

•     Fibres like cotton and jute are obtained from plants.

•     The process of making yarn from fibres is called spinning.

•     Fabric from yarns is made by weaving and knitting.

 

Let us try to answer some questions taken from the NCERT Book of Science Class 6th. This Exercise is taken from the same book.

 

Exercises

Q1. Classify the following fibres as natural or synthetic:

Nylon, wool, cotton, silk, polyester, jute

 

Answer.

Natural fibres: Wool, cotton, silk, jute

Synthetic fibre: Nylon, polyester

 

Q2. State whether the following statements are true or false:

a. Yarn is made from fibres.

Ans. True

b. Spinning is the process of making fibres.

Ans. False, spinning is a process of making yarn from fibres.

c. Jute is the outer covering of coconut.

Ans. False

d. The process of removing seed from cotton is called ginning.

Ans. True

e. Weaving of yarn makes a piece of fabric.

Ans. True

f. Silk fibre is obtained from the stem of a plant.

Ans. False

g. Polyester is a natural fibre.

Ans. False

 

Q3. Fill in the blanks:

a. Plant fibres are obtained from_________ and ________.

b. Animals fibres are __________ and ___________.

 

Answer.

a. Plant fibres are obtained from cotton and jute.

b. Animals fibres are wool and silk.

 

Q4. From which parts of the plant cotton and jute are obtained?

 

Answer.

Cotton is obtained from the fruit part of the cotton plant and jute is obtained from the stem of the jute plant.

 

Q5. Name two items that are made from coconut fibre.

 

Answer.

Baskets and mats are made from coconut fibre.

 

Q6. Explain the process of making yarn from fibre.

 

Answer.

The process of making yarn from the fibre is called spinning. In this process fibre from the mass of cotton wool are drawn out and twisted. This brings the fibres together to form yarn.

 

Q7. How is silk obtained from a cocoon?

 

Answer.

To obtain silk, the cocoon is boiled. The boiling kills the worms inside the cocoon and the silk thread is obtained.

 

Q8. What is sericulture?

 

Answer.

Breeding and cultivation of cocoons from silkworms to obtain raw silk from them is known as sericulture.

 

Q9. What are the factors which affect the quality of the wool?

 

Answer.

The quality of the wool depends upon the age, health and climate condition of the animal in which it lives.