Question detail
Which answer best matches the AQA GCSE Chemistry Life cycle assessment objective: use decimals, ratios, fractions, percentages, estimates and suitable significant figures when interpreting LCA data. (MS 1a, 1c, 1d, 2a)?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Life cycle assessment and recycling
Question
- A. 100 kg
- B. 80 kg
- C. 120 kg
- D. 90 kg
Answer
The correct option is 100 kg. It matches Life cycle assessment because it directly supports: Use decimals, ratios, fractions, percentages, estimates and suitable significant figures when interpreting LCA data. (MS 1a, 1c, 1d, 2a).
Explanation
The correct option is 100 kg. It is correct because it tests use decimals, ratios, fractions, percentages, estimates and suitable significant figures when interpreting LCA data. (MS 1a, 1c, 1d, 2a) within Life cycle assessment and recycling. Keep the Using resources concept boundary clear: do not swap finite resources with renewable resources, potable water with pure water, reuse with recycling, alloys with pure metals, polymers with composites, corrosion with oxidation, or fertilisers with nutrients unless the question asks for that comparison. Other options are weaker if they answer a neighbouring resource or sustainability idea instead of this exact objective.
Common mistake
Misunderstanding Decimal Use
Students often confuse the use of decimals with whole numbers when interpreting LCA data, leading to incorrect calculations.
Practice converting whole numbers to decimals and ensure to use appropriate decimal places based on the context of the data.
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