AQA A-Level Geography 3.1 Physical geography: a complete overview of water and carbon cycles, landscapes, hazards and ecosystems

What module 3.1 actually demands

Physical geography is the systems-thinking core of AQA A-Level Geography. Module 3.1 runs from the global water and carbon cycles, through the systems and landscapes of hot deserts, coasts and glacial environments, to the hazards people face and the ecosystems under growing stress. The examiners test two linked skills: precise understanding of physical processes and the confident application of systems concepts and located case studies to data and essay questions.

This guide walks through the topics of the module, then sets out the exam patterns AQA repeats. Each topic has a matching dot-point page with practice questions; this overview ties them together.

Water and carbon cycles

The one compulsory topic, Water and carbon cycles (3.1.1), sets up the systems framework for the whole module: inputs, outputs, stores, flows, feedback and dynamic equilibrium. You study the global water cycle and the drainage-basin water budget, the global carbon cycle with its fast and slow components, and how human activity (burning fossil fuels, deforestation, farming) disrupts both cycles and drives climate change. The two cycles are coupled through vegetation and the oceans.

Landscape systems: deserts, coasts and glaciers

The landscape options apply systems thinking to landform development.

Hot desert systems and landscapes covers the distribution and causes of aridity, sources of energy and sediment, aeolian and fluvial processes, desert landforms, and the causes, impacts and management of desertification on desert margins such as the Sahel.

Coastal systems and landscapes treats the coast as a system within a sediment cell, with marine, sub-aerial and biological processes producing erosional landforms (headlands, stacks, wave-cut platforms) and depositional landforms (beaches, spits, bars). It adds sea-level change and the debate over hard, soft and managed-realignment coastal management.

Glacial systems and landscapes covers the glacial system and mass balance, glacier movement, glacial, fluvioglacial and periglacial processes, the landforms of erosion (corries, troughs) and deposition (moraines, drumlins, eskers), and the management of fragile cold environments.

Hazards and ecosystems under stress

Hazards applies plate tectonic theory to volcanic and seismic hazards, and adds tropical storms and wildfires. It frames events through the concepts of hazard, risk and vulnerability, the Park model and the hazard management cycle, stressing that the scale of a disaster depends on capacity to cope as much as on magnitude.

Ecosystems under stress covers biodiversity, energy flow and nutrient cycling (the Gersmehl model), succession to a climatic climax or plagioclimax, the functioning of biomes, and the conservation and management of fragile ecosystems threatened by human activity and climate change.

How module 3.1 is examined

A typical AQA profile for Physical geography in Paper 1:

• Data-response and short answer. Interpreting graphs, maps, photographs and models, defining terms, and describing distributions and patterns.
• Process explanation. Linking named processes to named landforms (for example longshore drift to a spit, plucking and abrasion to a corrie) and explaining causes (aridity, the urban-style heat balance, succession).
• Case-study application. Using located examples for desertification, coastal management, a tectonic event, a tropical storm and a fragile ecosystem.
• Extended essays. The 9 and 20 mark questions reward evaluation, synopticity and a supported conclusion, for example assessing the success of coastal management or the role of human activity in disrupting the carbon cycle.

Check your knowledge

A mix of recall and application questions covering module 3.1. Attempt them, then check against the solutions.

1. State the drainage-basin water-balance equation. (2 marks)
2. Explain one cause of aridity in hot deserts. (2 marks)
3. Describe how longshore drift transports sediment along a coast. (3 marks)
4. Distinguish between till and fluvioglacial deposits. (2 marks)
5. Explain why earthquakes occur at conservative plate margins. (3 marks)
6. Define carrying capacity in an ecosystem context. (2 marks)
7. Name the three stores in the Gersmehl nutrient cycle model. (2 marks)
8. Distinguish between primary and secondary impacts of a hazard. (2 marks)