Glaciers as natural systems — AQA A-Level Geography
Test yourself on Glaciers as natural systems with AQA A-Level practice questions.
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Glaciers as natural systems explained
Glaciated environments operate as open systems driven by energy from climate and gravity.
Read the full explanation
You must apply systems concepts to these landscapes: inputs (precipitation, avalanches), stores (ice mass), flows (basal sliding, internal deformation), and outputs (meltwater, sublimation). Understand how positive feedback amplifies changes (e.g., reduced albedo increasing melting) and negative feedback dampens them, striving for dynamic equilibrium where accumulation equals ablation. Furthermore, distinguish between individual landforms (like corries or drumlins) and the broader landscape. You must explain how related landforms combine spatially and temporally to create characteristic landscapes, such as a classic upland glacial trough system.
Your focus
- Map the inputs, outputs, stores, and flows within a glaciated landscape system.
- Explain how positive and negative feedback mechanisms influence a glacier's dynamic equilibrium.
- Analyse how individual glacial landforms combine to produce characteristic glaciated landscapes.
Glaciers as natural systems exam tips
Marking Points
- Defines the glacier as an open system, correctly identifying specific inputs, outputs, stores, and flows of mass and energy.
- Explains the role of thermal and gravitational energy in driving glacial flows and transfers.
- Applies the concepts of positive and negative feedback loops to glacial mass balance and dynamic equilibrium.
- Distinguishes between individual glacial landforms and the broader characteristic landscapes they combine to create.
Examiner Tips
- 💡Use a systems diagram in your revision to visually map out the inputs, stores, flows, and outputs of a glacier.
- 💡When discussing dynamic equilibrium, always link it to the glacier's mass balance and how it responds to short-term climatic fluctuations.
- 💡Prepare specific examples of how individual landforms, such as a corrie, arête, and pyramidal peak, spatially combine to form an upland glaciated landscape.
Common Mistakes
- Treating landforms and landscapes as interchangeable terms; a landform is an individual feature, whereas a landscape is a broader area comprising multiple related landforms.
- Misidentifying the type of feedback; incorrectly stating that ice melt leading to further ice melt is negative feedback, when it is actually a positive feedback loop amplifying the change.
- Forgetting to include energy as a key driver of the system, focusing only on the physical mass of ice and water.