Knowledge Organiser: Life Cycle Assessment
Part of Life Cycle Assessment · GCSE GCSE Chemistry revision
This topic summary covers Knowledge Organiser: Life Cycle Assessment within Life Cycle Assessment for GCSE Chemistry. Revise Life Cycle Assessment in Using Resources for GCSE Chemistry with 20 exam-style questions and 12 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 16 of 16 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 16 of 16
Practice
20 questions
Recall
12 flashcards
Knowledge Organiser: Life Cycle Assessment
Key Terms
- LCA: Systematic evaluation of total environmental impact across all stages of a product's life
- Cradle to grave: From raw material extraction (birth) to final disposal (end of life)
- Cradle to cradle: Circular version — end of life becomes raw material for a new product
- Carbon footprint: Total greenhouse gas emissions across the entire lifecycle
Must-Know Facts
- 4 stages: Raw materials → Manufacturing → Use → End of life
- Smartphone: 85% of environmental impact is in raw material extraction
- LCA limitations: data quality, commercial bias, subjective comparisons, boundary problems
- LCA considers: energy, carbon footprint, water use, toxicity, land use, waste
- Companies may manipulate LCA results — this is called greenwashing
- Used for product comparison, sustainable design, and policy development
Key Equations
- No calculation equations — evaluative/analytical topic
- LCA 4 stages: Raw materials → Manufacturing → Use → End of life (disposal/recycling)
- Carbon footprint = total greenhouse gas emissions across all lifecycle stages
Common Mistakes
- Saying LCA is always objective: LCA can be manipulated — companies may select data that makes their product look better (greenwashing); results can be subjective depending on what is measured
- Forgetting all 4 stages of LCA: LCA must consider ALL stages — raw material extraction, manufacturing, use, AND end of life — missing any stage gives an incomplete picture
- Saying a product with a lower LCA score is always better: LCA results depend on which environmental factors are weighted — one product may have lower carbon footprint but higher water use
- Confusing LCA with recycling rates: LCA covers the entire lifecycle including recycling at the end — it is a broader assessment than just whether a material can be recycled
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Practice Questions for Life Cycle Assessment
What does LCA stand for in the context of environmental science?
State two factors that are measured during a life cycle assessment.
Quick Recall Flashcards
20 questions on Life Cycle Assessment — practise free
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