AQA · Chemistry · 8462
GCSE Chemistry: Life cycle assessment
Using resources · AQA GCSE Chemistry (8462), specification point 4.10.2.1. Cards are generated from the exam board's own specification for "Life cycle assessment", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is the purpose of a life cycle assessment (LCA)?
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To assess the environmental impact of a product at each stage of its life, from raw materials to disposal.
What is the first stage assessed in a life cycle assessment?
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Extracting and processing raw materials.
What is the final stage assessed in a life cycle assessment?
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Disposal at the end of the product's useful life (including transport and distribution at each stage).
The four LCA stages are raw materials, ?, use and operation, and disposal.
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manufacturing and packaging
Name one factor in an LCA that can be fairly easily quantified.
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Use of water (also: resources, energy sources, or production of some wastes).
Why is a life cycle assessment not a purely objective process?
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Allocating numerical values to pollutant effects is not straightforward and requires value judgements.
How can selective or abbreviated LCAs be misused?
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To reach pre-determined conclusions, e.g. to support claims made for advertising purposes.
An LCA should only be quantified where ? is readily available for energy, water, resources and wastes.
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data
Which two shopping bag materials are compared in a typical GCSE comparative LCA?
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Plastic and paper.
Which LCA stage covers a product's energy use while it is being used?
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Use and operation during its lifetime.
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