Class 8 Science – Chapter 3
Synthetic Fibres and Plastics
Worksheet (Practice Questions)

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A. Fill in the Blanks

1. Nylon is the first __________ fibre.
2. Rayon is also known as __________ silk.
3. Plastics that can be recycled are called __________ plastics.
4. Bakelite is a __________ plastic.
5. Plastics do not decompose easily because they are __________.

B. True or False

1. Rayon is obtained from natural sources. ( )
2. All plastics can be recycled. ( )
3. Plastics are poor conductors of heat. ( )
4. Acrylic fibre is used as a substitute for wool. ( )
5. Plastics are biodegradable materials. ( )

C. Very Short Answer Questions

1. Name one synthetic fibre.
2. Which fibre is called artificial silk?
3. Give one use of nylon.
4. Name one thermosetting plastic.
5. Why are plastics used to cover electric wires?

D. Short Answer Questions

1. What are synthetic fibres?
2. Differentiate between thermoplastic and thermosetting plastic.
3. Why is plastic considered a useful material?
4. Mention two disadvantages of plastics.

E. Long Answer Question

1. Explain the properties of plastics that make them useful in daily life.

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✍️ Practice this worksheet before exams for strong concept clarity.