These IGCSE Geography 0460 topics consistently produce the lowest scores. Prioritise these in your revision.
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Threshold population for settlements and services
Most candidates could not define threshold population or explain how it determines which services a settlement can support. Often confused with sphere of influence.
Affects: Paper 1
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Settlement distribution patterns and influencing factors
Candidates described where settlements were but could not explain the physical and human factors influencing their distribution, such as water supply, relief, and transport routes.
Affects: Paper 1
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Desert climate causes — atmospheric circulation
Few candidates could explain why hot deserts are dry in terms of descending air in the Hadley Cell and high pressure systems. Most gave vague answers about distance from the sea.
Affects: Paper 1
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Six-figure grid references
Many candidates gave four-figure references when six were required, or read the easting and northing in the wrong order. The subdivisions within a grid square were poorly understood.
Affects: Paper 2
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Triangular graphs — reading and interpreting
Candidates struggled to read values from triangular graphs accurately. Many read along the wrong axis or could not identify which direction to follow for each variable.
Affects: Paper 2
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Flood hydrographs — lag time and peak discharge
While candidates could label a hydrograph, few could explain what causes a short lag time or high peak discharge, or how urbanisation changes the hydrograph shape.
Affects: Paper 1, Paper 2
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Random sampling methods and their limitations
Candidates often described convenience sampling while calling it random sampling. Few could explain how to use random number tables or coordinates to achieve a genuinely random sample.
Affects: Paper 4
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Greenhouse effect mechanism — how it actually works
Many candidates described the enhanced greenhouse effect (more CO2 = warming) but could not explain the basic mechanism: short-wave radiation passes through the atmosphere, is absorbed by Earth, re-emitted as long-wave radiation, and trapped by greenhouse gases.
Affects: Paper 1