These O Level Environmental Management 5014 topics consistently produce the lowest scores. Prioritise these in your revision.
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Fieldwork — systematic sampling, results tables, conclusions, anomalies, limitations
Examiner flagged that systematic sampling was not well known, most candidates could not provide a results table, conclusions and identifying limitations and anomalous results were difficult for many.
Affects: Paper 2
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Specialist terms — selective breeding, bioremediation, biological control, bioaccumulation, surface run-off
Multiple terms were either unknown or confused — surface run-off was widely thought to mean rock movement, and bioremediation was confused with general land restoration.
Affects: Paper 1, Paper 2
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Map description and ocean identification
Candidates used 'above'/'below' instead of compass directions and confused the Atlantic and Pacific Oceans on the oil-spills map question.
Affects: Paper 1
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Ecological corridors and conservation strategies
Concept of ecological corridors was generally not well understood; some confused captive breeding with selective breeding or genetic modification.
Affects: Paper 1
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Drinking water treatment stages
Many correctly named the first and second stages in the production of drinking water, but the latter two stages and the role of chlorination in killing microbes were poorly known.
Affects: Paper 1, Paper 2
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Drought, fire risk and climate change vs population growth
Candidates struggled to link high temperature and lack of rainfall to combustible material; many wrongly attributed more droughts to population growth rather than to global warming and climate change.
Affects: Paper 1
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Igneous rocks and the Richter scale
Granite/basalt sometimes contradicted by adding 'slate' or 'graphite'; very few candidates referred to the logarithmic scale of the Richter scale, with imprecise terms used in place of magnitude.
Affects: Paper 2
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Recycling batteries and renewable energy benefits
Candidates struggled to suggest valid benefits of recycling batteries beyond vague 'they can be reused' or 'cost', and fewer could give two correct reasons why batteries are not recycled in some locations.
Affects: Paper 2
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Tsunami formation distinguished from tropical cyclones
The s24 P12 Q7(a) report notes 'there was sometimes confusion with descriptions of tropical cyclones. Some candidates omitted to state what a tsunami was after a detailed description of how they are formed.' Tsunamis are driven by underwater seismic events; cyclones by ocean-heat-driven low-pressure systems.
Affects: Paper 1
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Carrying capacity — definition and application
The s24 P22 Q2(b)(i) report observes: 'Some candidates could recall the meaning of carrying capacity; others appeared unaware of the term.' Carrying capacity is the maximum population size an environment can sustainably support given its food, water, shelter and other resource limits.
Affects: Paper 2
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Random vs systematic sampling — defining and choosing the right method
The s23 P22 Q2(c)(i) and s24 P22 Q1(e)(v) reports both flag: 'There was confusion between random and systematic sampling' and 'one of the most common misconceptions was suggesting that a quadrat could be used in an aquatic environment'. Random sampling = positions chosen using a random number generator or random coordinates; systematic = positions at regular intervals along a transect.
Affects: Paper 2
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Pie chart construction conventions
The s24 P22 Q1(f)(i) report critiques the most common errors: ruler/protractor not used, numbers as the key rather than shadings, and 'many did not follow the syllabus requirements of starting at noon with the largest sector and plotting clockwise in rank order from noon'.
Affects: Paper 2