Q5 of 15 Page 41

Explain why plastic containers are favored for storing food.

The characteristics that make plastics favorable for storing food items are:

(i) Light in weight.


(ii) Cheap in price.


(iii) Good strength.


(iv) Can be easily handled.


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3

Fill in the blanks with appropriate words.

(a) Synthetic fibres are also called _______or _______ fibres.


(b) Synthetic fibres are synthesised from raw materials called_______.


(c) Like synthetic fibres, plastic is also a________.

 4

Give examples which indicate that nylon fibres are very strong.

 6

Explain the difference between thermoplastic and thermosetting plastics.

 7

Explain why the following are made of thermosetting plastics.

(a) Saucepan handles


(b) Electric plugs/switches/plug boards