Earth's Resources and Sustainable DevelopmentAQA GCSE Chemistry: Flashcards
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What is the difference between a finite resource and a renewable resource?
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- What is the difference between a finite resource and a renewable resource?
- A finite resource will eventually run out; a renewable resource can be replenished at a similar rate to its use.
- Define sustainable development.
- Meeting the needs of current generations without compromising the ability of future generations to meet their own needs.
- What are the four stages assessed in a life cycle assessment (LCA)?
- Extracting and processing raw materials; manufacturing and packaging; use and operation; disposal.
- Why is a life cycle assessment not a purely objective process?
- Because allocating numerical values to pollutant effects requires value judgements, unlike measurable quantities such as water or energy use.
- What is a risk of using selective or abbreviated LCAs?
- They can be misused to reach a predetermined conclusion, rather than giving a fair evaluation.
- Name the three main ways of reducing the use of limited resources.
- Reduction in use, reuse of materials, and recycling of materials.
- How can metals be recycled?
- By melting and recasting them into new products.
- Give an example of a natural product being replaced by an agricultural or synthetic product.
- Synthetic fibres replacing natural fibres (or similar valid example).
- Why might comparing plastic and paper shopping bags using LCA give different 'winners' depending on the study?
- Because the choice of which stages or effects to include or exclude in the LCA can change the outcome, since LCA is not purely objective.
- Give an example of a finite resource and a renewable resource.
- Fossil fuels (finite); timber or wind energy (renewable).