Lesson 4.10.2.1

4.10.2.1 Life cycle assessment Quiz: AQA Chemistry, Unit 10

20 questions

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Lesson 4.10.2.1, Life cycle assessment: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 10: Using resources, written with Revision Ninja.

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The 20 questions

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

    • Six
    • Ten
    • Four
    • Two

  2. What is the first stage of a life cycle assessment?

    • Extracting raw materials
    • Product disposal
    • Packaging distribution
    • Manufacturing product

  3. Which LCA stage includes transport and distribution at the end of a product's life?

    • Raw material extraction
    • Disposal
    • Manufacturing
    • Use and operation

  4. Which of these is fairly easy to quantify in an LCA?

    • Energy use
    • Brand loyalty
    • Public opinion
    • Pollutant value judgements

  5. Why is life cycle assessment less objective when assessing pollutants?

    • Requires value judgements
    • Energy is infinite
    • Stages are identical
    • Data is secret

  6. How can selective life cycle assessments be misused?

    • Advertising claims
    • Weighing products
    • Calculating mass
    • Measuring volume

  7. Which two products are commonly compared in simple LCA case studies?

    • Cotton and wool shirts
    • Wood and brick blocks
    • Glass and steel cans
    • Plastic and paper bags

  8. Which LCA stage includes making a product from raw materials?

    • Manufacturing and packaging
    • Product use
    • Disposal phase
    • Resource extraction

  9. A plastic bag uses 40 MJ of energy and a paper bag uses 60 MJ. What is the percentage difference relative to paper?

    • About 20%
    • About 67%
    • About 33%
    • About 50%

  10. What is the purpose of a comparative life cycle assessment?

    • Calculate retail cost
    • Compare products fairly
    • Measure mass only
    • Determine melting point

  11. What flaw is present if a life cycle assessment only includes a single stage?

    • It is accurate
    • It is complete
    • It is objective
    • It is selective

  12. Which process is included at each stage of a life cycle assessment?

    • Transport and distribution
    • Chemical synthesis
    • Product design
    • Retail marketing

  13. What happens to the calculated impact if an LCA ignores the disposal stage?

    • It remains unchanged
    • It is exaggerated
    • It is understated
    • It becomes negative

  14. Energy use of a bag is 0.25 kg per bag as a decimal. What percentage does this represent?

    • 0.025%
    • 250%
    • 25%
    • 2.5%

  15. A plastic bag weighs 5 g and a paper bag weighs 25 g. What is the ratio of plastic to paper?

    • 1 : 25
    • 25 : 1
    • 1 : 5
    • 5 : 1

  16. Estimate the total mass of 1,000 bags at 0.4 kg each.

    • 400 kg
    • 4000 kg
    • 40 kg
    • 4 kg

  17. Round 0.04567 to two significant figures.

    • 0.045
    • 0.0457
    • 0.05
    • 0.046

  18. What skill is used when converting LCA bar chart data into a table?

    • Balancing equations
    • Calculating moles
    • Titration analysis
    • Translating graphical forms

  19. What is a major limitation of a life cycle assessment that omits disposal?

    • It is overly expensive
    • It is completely objective
    • It is too detailed
    • It is incomplete

  20. What makes a comparison between two product LCAs valid?

    • Omitting transport
    • Using different metrics
    • Ignoring raw materials
    • Using identical stages

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