Systems, Causality, Risk and Resilience
Applying specialised concepts including systems, equilibrium, feedback, causality, inequality, interdependence, risk, resilience, thresholds and sustainability.
How to study A-level Geography
Frame the issue by place, space and scale, explain the operating processes, interrogate evidence, compare players and contexts, then reach a qualified judgement.
Core concepts
Concept 1
A system has inputs, stores, transfers, outputs and boundaries whose interactions can create equilibrium or change.
Exam cue: Build a causal chain that distinguishes trigger, process, feedback and outcome.
Concept 2
Causality may be multi-directional and contingent; feedback can amplify or dampen change.
Exam cue: Identify who or what is exposed and why vulnerability differs.
Concept 3
Risk combines hazard, exposure and vulnerability, while resilience concerns capacity to absorb, adapt and recover.
Exam cue: Use thresholds and time lags when evaluating whether a system is stable or sustainable.
Risk pitfalls and guardrails
Listing factors without explaining their interactions.
Guardrail: Do not replace process explanation with case-study narration, source evaluation with description, or a valid board route with an invented mix of optional themes.
Confusing a correlation with a causal mechanism.
Guardrail: Do not replace process explanation with case-study narration, source evaluation with description, or a valid board route with an invented mix of optional themes.
Assuming resilience means returning to exactly the previous state.
Guardrail: Do not replace process explanation with case-study narration, source evaluation with description, or a valid board route with an invented mix of optional themes.
Memory anchors
System
A system is a set of connected components with flows across a defined boundary.
Feedback
Feedback occurs when a system output influences a later input or process.
Threshold
A threshold is a critical point beyond which system behaviour changes markedly.
Risk
Risk reflects the interaction of a hazard with exposure and vulnerability.
Resilience
Resilience is the capacity to absorb disturbance, adapt and continue functioning.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
In a drainage basin model, precipitation is 900 mm, evapotranspiration 520 mm and runoff 330 mm. What is the annual change in storage?
Which sequence is a positive feedback in a warming Arctic system?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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