G8-PHY-L4 Synthetic Fibres and Plastics

What is the primary difference between natural and synthetic fibres?

• Natural fibres are more durable than synthetic fibres
• Synthetic fibres are made by humans
• Natural fibres are cheaper than synthetic fibres
• Synthetic fibres are always stronger than natural fibres

Which of the following is NOT a natural fibre?

• Cotton
• Silk
• Wool
• Nylon

What is rayon primarily made from?

• Animal hair
• Wood pulp
• Cotton plants
• Synthetic chemicals

What characteristic of nylon makes it suitable for making parachutes?

• It is lightweight
• It is biodegradable
• It is colorful
• It is expensive

Which synthetic fibre is known for its quick drying properties?

• Rayon
• Acrylic
• Nylon
• Polyester

What is a disadvantage of synthetic fibres when exposed to fire?

• They are too expensive
• They melt and can stick to skin
• They are not durable
• They are difficult to wash

Which of the following is a property of plastics?

• They rust easily
• They are heavy and expensive
• They are poor conductors of heat and electricity
• They decompose quickly

What is the main environmental concern regarding plastic waste?

• It is biodegradable
• It decomposes quickly
• It takes years to decompose
• It is made from natural resources

Which of the following is an example of thermosetting plastic?

• PVC
• Bakelite
• Polythene
• Nylon

What is the primary use of PET (polyethylene terephthalate)?

• Making clothes
• Storing food and drinks
• Creating furniture
• Manufacturing toys