This exam focus covers Exam Focus within Life Cycle Assessment for GCSE Chemistry. Revise Life Cycle Assessment in Using Resources for GCSE Chemistry with 22 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 15 of 17 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
🎯 Exam Focus
High Frequency
LCA is one of the most commonly examined topics in the Using Resources unit and frequently appears in extended answer questions worth 4-6 marks.
Common Question Types:
- Define [1-2 marks]: "What is meant by a life cycle assessment?" — Must include: systematic evaluation + all stages of life + environmental impact.
- Explain stages [3-4 marks]: "Explain what is considered at the raw material extraction stage of an LCA." — Mining energy, habitat destruction, water use, transport.
- Evaluate usefulness [4-6 marks]: "Evaluate how useful an LCA is for comparing the environmental impact of two shopping bags." — Use case studies, acknowledge limitations (bias, subjectivity, data quality).
- Compare products [3-4 marks]: "Use the LCA data in the table to compare the environmental impact of Product A and Product B." — Read data carefully, compare stage by stage, reach a conclusion.
Key Points Examiners Look For:
- All four stages named correctly in order
- LCA considers multiple environmental factors, not just CO₂
- Limitations acknowledged (bias, incomplete data, subjectivity)
- Cradle to grave terminology used correctly
Edexcel 1CH0: Examined in Paper 2 (1CH0/2). Edexcel tests LCA to compare the environmental impact of products — you must be able to identify stages and evaluate trade-offs. In Edexcel-style questions, the command word "Suggest" appears frequently — use your chemistry knowledge to apply to an unfamiliar context.
Quick Check: List the four stages of a life cycle assessment in the correct order.
1. Raw material extraction — mining, drilling, harvesting raw materials. 2. Manufacturing — processing raw materials into the finished product. 3. Use phase — environmental impact during the product's operational lifetime. 4. End of life — disposal, recycling, or incineration.
Quick Check: Give two limitations of a life cycle assessment.
Any two from: (1) Data quality — supply chain data is often incomplete or estimated, reducing accuracy. (2) Commercial bias — companies may manipulate boundaries or assumptions to make their product appear more environmentally friendly (greenwashing). (3) Subjective comparisons — different types of environmental impact (CO₂, water use, habitat loss) are difficult to compare objectively. (4) Boundary problems — it is unclear what to include or exclude from the assessment.
Quick Check: What does "cradle to grave" mean in the context of LCA?
"Cradle to grave" describes the full lifespan of a product — from the extraction of raw materials from the Earth (the cradle) through manufacturing and use, to final disposal (the grave). It means the LCA considers ALL environmental impacts across the entire life of the product, not just one stage.
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.