(C) Which of the following characteristics are apt about the writer in the following context "Meanwhile, there is a dramatic increase in secondary poisoning. Vultures feed on carcasses laced with poison, intended to kill jackals or other predatory carnivores or they are poisoned by the lead in animals left behind by their hunters." (1) Negligent (4) Patient (2) Concerned (5) Worried (3) Caring (6) Informative (i) (1) and (3) (ii) (4) and (5) (111) (2) and (5) (iv) (3) and (6)
Answers
Answer:
CHAPTER NO. 3
Synthetic Fibres and Plastics
Class 8 Science
EXERCISE
Question 1.
Explain why some fibres are called synthetic.
Answer:
Some fibres are called synthetic fibres because they are made by man using chemicals.
Question 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.
Answer:
(b) it is obtained from wood pulp.
Question 3.
Fill in the blanks with appropriate words.
(a) Synthetic fibres are also called ____ or ____ fibres.
(b) Synthetic fibres are synthesised from a raw material called _____
(c) Like synthetic fibres, plastic is also a _____
Answer:
(a) man-made, artificial fibres
(b) petrochemicals
(c) polymer
Question 4.
Give examples which indicate that nylon fibres are very strong.
Answer:
The following examples indicate that nylon fibres are very strong.
(i) They are used for making parachutes and ropes for rock climbing.
(ii) They are used in making seat-belts, fishing nets, tyre cord, a string for sports rackets and
musical instruments.
Explanation:
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Explanation:
. negligent 2. concerned 3.caring 4. patient 5.worried 6. Informative