Cambridge IGCSE Geography: The Natural Environment — Revision Notes (0460)

Condensed for the final weeks. For the full explanation of each sub-topic, use the study guides for earthquakes and volcanoes, rivers, coasts, weather, and climate and natural vegetation.

2.1 Earthquakes and volcanoes

Two named volcano types: strato/composite cone and shield. Volcano features: crater, vent, magma chamber. Earthquake features: epicentre (surface point directly above origin), focus (underground origin point), magnitude. Three named plate boundaries: constructive/divergent (plates move apart), destructive/convergent (plates move together, often with subduction), conservative (plates slide past, no significant creation/destruction of crust). The Pacific “Ring of Fire” illustrates the distribution argument: countries like Japan, Indonesia and Chile sit on destructive boundaries, producing frequent earthquakes and a high concentration of volcanoes. Required case studies: one named earthquake, one named volcano — for volcanoes, both hazards AND opportunities must be covered; a one-sided answer loses marks.

2.2 Rivers

Hydrological characteristics: width, depth, speed of flow, discharge. Drainage basin terms: watershed, tributary, confluence. Processes: interception, infiltration, throughflow, groundwater flow, evaporation, overland flow. Erosion/transport/deposition landforms: waterfalls, potholes, meanders, oxbow lakes, deltas, levées, flood plains — know the long profile and cross-sectional shape alongside named landforms. Rivers present both hazards (flooding, erosion) and opportunities. Required case study: opportunities, hazards and management of a river or rivers.

2.3 Coasts

Sea and wind erosion/transport/deposition landforms: cliffs, wave-cut platforms, caves, arches, stacks, stumps, bay/headland coastlines, beaches, spits, coastal sand dunes. Coral reefs and mangrove swamps need specific developmental conditions. Coastal hazards: coastal erosion, tropical storms. Required case study: opportunities, hazards and management of an area of coastline. Precision matters where river and coastal erosion vocabulary overlaps — always specify which agent (river, sea, wind) is doing the eroding for the environment named in the question.

2.4 Weather

Largely instrument-and-diagram recall — drill instrument names against what they measure: Stevenson Screen (housing, siting, use), rain gauge, maximum-minimum thermometer, wet-and-dry bulb thermometer, sunshine recorder, barometer, anemometer, wind vane, simple digital instruments. Practise calculations from weather-instrument data and interpreting weather/climate graphs and diagrams.

2.5 Climate and natural vegetation

Two named climates: equatorial and hot desert — described by temperature (hottest/coolest month means, annual range) and precipitation (amount, seasonal distribution, convection/relief rainfall). Factors behind each: latitude, pressure systems, winds, distance from the sea, altitude, ocean currents. Two named ecosystems: tropical rainforest and hot desert — know the vegetation-soil-wildlife-climate relationship for each. Causes and effects of tropical rainforest deforestation, locally and globally. Required case study: an area of tropical rainforest AND an area of hot desert.

Case study strategy — plan early, reuse widely

A single well-chosen location can cover more than one requirement: a coastal delta or low-lying coastline case study can support both 2.2 (river flood-plain/delta opportunities) and 2.3 (coastal erosion management); a well-researched hot desert region can supply both 2.5’s climate data and its required desert ecosystem case study. Choose reusable locations rather than memorising a separate, completely unconnected place for every required case study listed above. For every required case study, memorise: named location, date/scale, named effects, named management response — vague or unnamed examples score substantially fewer marks than answers citing real specifics.

Two exam styles in this theme

Weather (2.4) is pure instrument-and-diagram recall. The other four sub-topics are process-and-case-study questions: expect a labelled diagram or photograph of a landform, a request to name the forming process, then a follow-up asking for a named, located case study.

Why this theme sits between Themes 1 and 3

Theme 2’s physical processes are not revised in isolation from the rest of the syllabus. Theme 1’s population and settlement content assumes some understanding of the natural hazards and environmental opportunities covered here (why people settle on floodplains despite flood risk, or near volcanoes despite the hazard, is explained by Theme 2’s opportunities-and-hazards framing). Theme 2’s physical skills – reading climate graphs, interpreting hazard maps, describing landform diagrams from a photograph – are also drawn on directly in Paper 2’s Geographical Skills content, so this theme’s value extends beyond its own Paper 1 questions into skills tested elsewhere on the qualification.

Exam traps

• Giving a one-sided hazards-only (or opportunities-only) answer for volcanoes, when both are explicitly required.
• Confusing river erosion landforms with coastal erosion landforms — always name the correct agent (river, sea, wind) for the environment in the question.
• Citing a case study with no named location or specific facts.
• Treating weather (instrument recall) and the other four sub-topics (process + case study) with the same revision method, when they need different preparation.

Self-test

1. Name the three types of plate boundary and state what happens at each.
2. What two case studies does 2.1 require, and what must an answer cover for full marks?
3. Name four landforms created by river erosion, transport or deposition.
4. What instrument measures rainfall, and what instrument measures wind direction?
5. Name the two climates specified in 2.5, and one factor that shapes each.

Answers: 1. Constructive/divergent (plates move apart), destructive/convergent (plates move together, often with subduction), conservative (plates slide past each other) [3]. 2. A named earthquake and a named volcano; for the volcano, cover both hazards and opportunities, not one alone. 3. Any four of: waterfalls, potholes, meanders, oxbow lakes, deltas, levées, flood plains. 4. Rain gauge measures rainfall; wind vane measures wind direction. 5. Equatorial and hot desert; factors include latitude, pressure systems, winds, distance from the sea, altitude, or ocean currents.

Official syllabus

Cambridge International, Cambridge IGCSE Geography (0460) syllabus for exams in 2025 and 2026 — the same source already cited by the study guides for each sub-topic, which first reproduced this theme’s content from it. Verified 2026-09-06.