Table 3.1 Natural and Artificial
Fibres
8. No. Name of
Article
Type of fibre
(Natural/
artificial)
Answers
Answer:
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Explanation:
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Answer:
The clothes which we wear are made of fabrics. Fabrics are made from fibres obtained from natural or artificial sources. Can you name some natural fibres? Fibres are also used for making a large variety of household articles. Make a list of some common articles made from fibres. Try to separate them into those made from natural fibres and those made from artificial fibres.
S. No. Name of Article Type of Fibre (Natural/ artificial)
Why did you label some fibres as artificial?
You have read in your previous classes that natural fibres like cotton, wool, silk, etc., are obtained from plants or animals. The synthetic fibres, on the other hand, are made by human beings. That is why these are called synthetic or man-made fibres.
3.1 What are Synthetic Fibres?
Try to recall the uniform pattern found in a necklace of beads joined with the help of a thread [Fig. 3.1(a)]. Or, try to join a number of paper clips together to make a long chain, as in Fig. 3.1 (b). Is there any similarity between the two?
Fig. 3.1:(a) Beads and, (b)Paper clips joined to form long chains
A synthetic fibre is also a chain of small units joined together. Each small unit is actually a chemical substance. Many such small units combine to form a large single unit called a polymer. The word ‘polymer’ comes from two Greek words; poly meaning many and mer meaning part/unit. So, a polymer is made of many repeating units.