Exercises
1. Explain why some fibres are called synthetic.
2. Mark () the correct answer.
Rayon is different from synthetic fibres because
(a)
it has a silk-like appearance.
(b)
it is obtained from wood pulp.
(c)
its fibres can also be woven like those of natural fibres.
3.
Fill in the blanks with appropriate words.
(a)
Synthetic fibres are also called
or
fibres,
(b)
Synthetic fibres are synthesised from raw material called
(c) Like synthetic fibres, plastic is also a
4. Give examples which indicate that nylon fibres are very strong.
5. Explain why plastic containers are favoured for storing food.
6. Explain the difference between thermoplastic and thermosetting plastics.
7. Explain why the following are made of thermosetting plastics.
Answers
Answered by
1
Answer:
because they are made by men
please mark as brainiest answer
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