Lesson 5.10.2.1

5.10.2.1 Life cycle assessment Quiz: AQA Combined Science, Unit 17

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 5.10.2.1, Life cycle assessment: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 17: Using resources, written with Revision Ninja.

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The 20 questions

  1. How many stages does the spec list for a life cycle assessment?

    • Three
    • Six
    • Two
    • Four

  2. Which activity is excluded from the four main stages of a life cycle assessment?

    • Disposing safely
    • Manufacturing items
    • Extracting materials
    • Marketing product

  3. What does a life cycle assessment evaluate for a product?

    • Market demand
    • Environmental impact
    • Manufacturing cost
    • Retail price

  4. What makes life cycle assessments partly subjective rather than purely factual?

    • Direct data
    • Value judgements
    • Exact measurements
    • Reliable sources

  5. Which LCA factor can be quantified most easily?

    • Visual impact
    • Water use
    • Litter harm
    • Habitat loss

  6. What risk is associated with selective or abbreviated LCAs?

    • Inaccurate chemical analysis
    • Increased financial cost
    • Higher energy usage
    • Predetermined conclusions

  7. Which two everyday products are commonly compared in student LCA tasks?

    • Shopping bags
    • Steel girders
    • Copper pipes
    • Glass bottles

  8. Which LCA stage includes recycling and final transport?

    • Disposal
    • Extraction
    • Operation
    • Manufacturing

  9. Why can advertising claims based on only one LCA stage be misleading?

    • High accuracy
    • Selective LCA
    • Global standard
    • Complete data

  10. How should conflicting LCA data like high water but low energy be handled?

    • Weigh all impacts
    • Ignore energy
    • Ignore water
    • Average values

  11. A plastic bag's LCA shows 0.25 of its total energy in manufacturing. What percentage is this?

    • 0.25%
    • 250%
    • 2.5%
    • 25%

  12. A plastic bag uses 40 g of material and a paper bag uses 80 g. What is the ratio of paper to plastic?

    • 1 : 4
    • 4 : 1
    • 1 : 2
    • 2 : 1

  13. A calculation gives 3.14159 kWh per bag. What is this to two significant figures?

    • 3.1
    • 3.2
    • 3.14
    • 3

  14. What is the calculated value of 0.98 multiplied by 10 squared?

    • 98
    • 0.98
    • 980
    • 9.8

  15. Why do life cycle assessment reports explicitly state their system boundaries?

    • Give location
    • List materials
    • State cost
    • Show included stages

  16. What determines the preferred bag when LCAs show trade-offs?

    • Judged factor priorities
    • Government legislation
    • Total bag mass
    • Material colour

  17. What makes an evaluation of an LCA reliable?

    • Omitting transport steps
    • Readily available data
    • Using subjective opinions
    • Guessing missing values

  18. Disposal of a product emits 12 kg CO2, and its manufacture emits 48 kg. What fraction of their combined emissions is disposal?

    • 1/5
    • 1/3
    • 1/4
    • 1/2

  19. At which point in an LCA is transport included?

    • Ignored entirely
    • Within each stage
    • Only during manufacturing
    • Only during disposal

  20. Which part of a life cycle assessment is based on measured data rather than value judgements?

    • Environmental harm
    • Energy use
    • Ethical impact
    • Visual appeal

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