AQA GCSE Chemistry
AQA GCSE Chemistry 4.10.2 Life Cycle Assessment and Recycling Exam Questions
Free AQA GCSE Chemistry exam questions for 4.10.2 Life Cycle Assessment and Recycling, with a mark scheme for every pack. Covers the four stages of a life cycle assessment, comparing products, and reducing the use of resources through reuse and recycling.
4.10.2 Life Cycle Assessment and Recycling exam questions
2 question packs of real past exam questions, each with its mark scheme. Do not stop after a few: answer as many as you can without notes, then mark every answer with the mark scheme. The more questions you do, the more quickly you will spot how examiners ask about each idea.
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About AQA GCSE Chemistry 4.10.2 Life Cycle Assessment and Recycling
AQA GCSE Chemistry 4.10.2 looks at how the environmental impact of a product is measured from start to finish. You learn the four stages of a life cycle assessment (LCA), why some values are easier to quantify than others, how LCAs can be misused, and how reusing and recycling glass, metals and other materials reduces the use of limited resources and energy. The topic is assessed on Paper 2 and links to resources and extraction in 4.10.1. Examiners usually give data comparing two products, such as plastic and paper bags, and ask you to carry out a simple comparative LCA and draw a conclusion.
What you need to know
- Stages of an LCA Extracting and processing raw materials; manufacturing and packaging; use and operation during its lifetime; disposal at the end of its useful life, including transport and distribution at each stage.
- Quantifying impacts Use of water, resources, energy sources and production of some wastes can be fairly easily quantified. Allocating numerical values to pollutant effects is less straightforward and requires value judgements, so LCA is not a purely objective process.
- Misuse of LCAs Selective or abbreviated LCAs can be devised to evaluate a product, which can be misused to support claims for advertising purposes.
- Reduce, reuse, recycle Reducing use of materials reduces energy use and environmental impact of extraction, quarrying and mining. Many materials are made from limited raw materials and need energy from fossil fuels.
- Recycling glass and metals Glass bottles can be reused; other glass is crushed and melted to make different glass products. Metals are recycled by melting and recasting or reforming; some may need separation. Recycling usually uses less energy than extraction.
Common mistakes in 4.10.2 Life Cycle Assessment and Recycling
- Leaving out a stage of the LCA, especially transport or disposal.
- Saying LCAs are completely objective. Some parts involve value judgements.
- Assuming the product with the lowest energy use is always best. Compare all the data: energy, water, waste and emissions.
- Saying recycling uses no energy. It uses less energy than extracting new material, but still needs energy for collection, sorting and melting.
- Forgetting that a shortened LCA might be used selectively in advertising.
Try three 4.10.2 Life Cycle Assessment and Recycling exam-style questions
1. Name the four stages of a life cycle assessment. (4 marks)
Show the mark scheme answer
Extracting and processing raw materials; manufacturing and packaging; use during lifetime; disposal at end of life.
2. Explain why a life cycle assessment is not a purely objective process. (2 marks)
Show the mark scheme answer
It is difficult to give numerical values to some effects such as pollution; so value judgements must be made.
3. Give two reasons why recycling aluminium cans is better than extracting new aluminium. (2 marks)
Show the mark scheme answer
Any two: uses less energy; conserves the limited ore (bauxite); less mining or quarrying waste and environmental damage; less waste in landfill.
4.10.2 Life Cycle Assessment and Recycling FAQs
What does AQA GCSE Chemistry 4.10.2 cover?
It covers the stages of life cycle assessments, the limitations and possible misuse of LCAs, and ways of reducing use of resources by reusing and recycling materials such as glass and metals.
Which paper is 4.10.2 on?
Section 4.10 Using resources is assessed on AQA GCSE Chemistry Paper 2.
How do I answer a data question comparing two products?
Compare each row of data with numbers, say which product is better for each, then give an overall conclusion that weighs the most important factors. Mention any data that is missing or based on judgement.
