
This resource is a diagnostic knowledge check for the Biogeochemical Cycles section of the AQA A-level Environmental Science specification.
It is designed to help students and teachers identify gaps in understanding after teaching the Physical Environment: Biogeochemical Cycles topic. The questions are original and structured to assess recall, application and skills/data analysis.
The knowledge check covers:
• the importance of biogeochemical cycles for living organisms
• limited availability of key elements and nutrient recycling
• the carbon cycle and human influences
• photosynthesis, respiration, combustion, carbon reservoirs and carbon sequestration
• human impacts on carbon dioxide, methane, soil carbon and biomass carbon
• sustainable management of the carbon cycle
• the nitrogen cycle and human influences
• the Haber process, fertiliser use, land drainage, legumes, sewage and combustion
• consequences of changes in nitrogen reservoirs, including eutrophication and climate change
• sustainable management of the nitrogen cycle
• the phosphorus cycle and human influences
• phosphate fertilisers, eutrophication and phosphorus as a limiting factor
• sustainable management of the phosphorus cycle
The resource includes:
• Section A: Recall questions
• Section B: Application questions
• Section C: Skills and data analysis
• full teacher mark scheme
• specification point mapping for each question
• maths, practical and working scientifically links where relevant
This resource is suitable for:
• AQA A-level Environmental Science students
• end-of-topic review
• retrieval practice
• diagnostic assessment
• revision before Paper 1
• identifying misconceptions and gaps before moving on
The mark scheme is designed to support teacher feedback and student self-assessment. It includes acceptable answers, specification links and guidance on common areas where students may lose marks.
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