exam questions

• Explain one advantage and disadvantage of using ropes made from plant fibres over oil-based plastics (2) 

  -       They are renewable sources, never run out 

  -       They are not as strong, lower tensile strength
• Explain why the use of bamboo fibres to make coffee cups is sustainable (2) 

  -       Bamboo plants can be regrown therefore are a renewable source 

  -       It is available to future generations
• Explain why the production of fibres from nettles is more sustainable than fibres produced from crude oil (3) 

  -       Nettles can be regrown, so they are renewable 

  -       Crude oil is non-renewable and will run out 

  -       Use of fibres from nettles will be available for future generations 

  -       Clothing made of nettle fibres is biodegradable.
• Explain why the use of plant fibres from plants is sustainable (2)

  -       More plants can be grown 

  -       Plant fibres are thus a renewable resource- available to future generations.