What do Global Hazards and Changing Climate cover in OCR Geography B?

These are the first two topics of Component 1, Our Natural World. Global Hazards asks why we experience weather and tectonic hazards: the global atmospheric circulation, tropical storms and drought, plate boundaries and tectonic events, and how hazards are managed. Changing Climate asks whether climate change is cause for concern: the evidence from the Quaternary, the natural causes and the human enhanced greenhouse effect, the impacts, and management through mitigation and adaptation. Both are assessed in Component 1, worth 70 marks and 35 percent of the GCSE.

Which hazard case studies do I need for OCR Geography B?

OCR sets the categories but lets your school choose the named places. You need a tropical storm (commonly Typhoon Haiyan), and contrasting tectonic events, one in an AC or EDC and one in an LIDC (commonly a Japanese or New Zealand earthquake against Haiti 2010 or Nepal 2015). For each you need specific facts: magnitude, deaths, named places and the responses. Learn your own school's chosen examples in this kind of detail.

How are the hazard and climate questions marked?

Component 1 mixes short answer (1 to 4 marks) for definitions, describing patterns and short explanations, with extended level-of-response questions (6 marks and higher) using command words such as Assess, Evaluate and To what extent. The extended questions reward a balanced, evidenced judgement and a named example. Three marks across the paper are for spelling, punctuation, grammar and specialist terminology.

What is the difference between mitigation and adaptation?

Mitigation reduces the causes of climate change: switching to renewable energy, afforestation, carbon capture and international agreements such as the Paris Agreement. Adaptation helps people cope with the effects already happening: flood defences, drought-resistant crops and better water management. OCR often asks you to compare them or judge which should be prioritised; the strongest answers conclude that both are needed together, mitigation to limit future warming and adaptation to manage the change already locked in.

How should I revise the Global Hazards and Changing Climate content?

Learn each process precisely (how a tropical storm forms, why earthquakes happen at each boundary, how ice cores record past climate), then attach figures and named examples. Drill the contrast between an AC and an LIDC for tectonic hazards, because the development comparison is the highest-tariff question. Practise the four management approaches (prediction, protection, planning, preparation) and the mitigation versus adaptation debate, and rehearse 6 mark Assess and Evaluate answers against the mark scheme.

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OCR GCSE Geography B Global Hazards and Changing Climate: a complete overview of weather, tectonic hazards and climate change

A deep-dive OCR GCSE Geography B guide to Global Hazards and Changing Climate in Component 1. Covers the global atmospheric circulation, tropical storms, tectonic hazards, hazard management and climate change, with the case studies and exam patterns OCR repeats.

Generated by Claude Opus 4.818 min readJ384 Component 1Updated 2026-06-02

Reviewed by: AI editorial process; not yet individually human-reviewed

Jump to a section

What these topics actually demand
Global Hazards: weather
Global Hazards: tectonics and management
Changing Climate
How these topics are examined
Check your knowledge

What these topics actually demand

Global Hazards and Changing Climate open Component 1, Our Natural World. They run from the planetary-scale circulation that drives our weather, through the storms and earthquakes that threaten people, to the long story of a changing climate. OCR's enquiry style frames each as a question, and the examiners test two linked skills: precise knowledge of physical processes, and the ability to support a judgement with named, factual case studies.

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

Global Hazards: weather

The topic opens with the global atmospheric circulation: the three-cell model (Hadley, Ferrel, Polar), how rising air at the Equator and sinking air at 30 degrees create the world's rainforests and deserts, and how the Coriolis effect turns pressure differences into the trade winds and westerlies. This circulation explains the distribution of extreme weather, including drought where sinking air or a persistent high suppresses rain (the Sahel).

The same circulation produces tropical storms: warm oceans above 27 degrees Celsius fuel rising air that condenses and releases latent heat, spinning into a storm around a calm eye. OCR wants the formation, the global distribution, and a named example (commonly Typhoon Haiyan, 2013) used to separate primary and secondary impacts and immediate and long-term responses.

Global Hazards: tectonics and management

Tectonic hazards cover the structure of the Earth, the three plate boundaries (destructive, constructive, conservative), and the processes that move plates: slab pull and ridge push, with convection now de-emphasised. The signature question is the contrast between an AC and an LIDC: the same magnitude event kills far more people and disrupts recovery for longer in a poorer country, because wealth buys building codes, warnings and emergency services.

Managing hazards asks why people live in dangerous places (fertile soil, geothermal energy, tourism, family ties, cost of moving) and how the four approaches reduce impacts: prediction, protection, planning and preparation. A key idea is that weather hazards can usually be predicted, so warnings save lives, while earthquakes cannot, so protection and preparation matter most.

Changing Climate

Changing Climate asks whether climate change is cause for concern. It covers the evidence from the Quaternary (ice cores, tree rings, historical records, direct measurements), the natural causes (orbital cycles, sunspots, volcanic activity), and the human enhanced greenhouse effect from fossil fuels, deforestation and agriculture. It then covers the impacts (sea-level rise, melting ice, extreme weather, stress on water and food) and the management response: mitigation (cutting the causes) and adaptation (coping with the effects).

How these topics are examined

A typical OCR profile for Global Hazards and Changing Climate:

Short answer. Defining terms (storm surge, mitigation), describing distributions, and reading maps, graphs and photographs.
Process questions. Explaining how a tropical storm forms, why earthquakes happen at a boundary, or how ice cores record climate, often with a clear sequence.
Case-study questions. Using named facts and figures for tropical storms and contrasting tectonic events.
Extended Assess and Evaluate answers. Judging how far impacts depend on development, evaluating hazard management, or comparing mitigation and adaptation, with a balanced, evidenced conclusion and SPaG marks at stake.

Check your knowledge

A mix of recall and applied questions covering both topics. Attempt them under timed conditions, then check against the solutions.

Explain why hot deserts are found at about 30 degrees north and south of the Equator. (4 marks)
Describe the conditions needed for a tropical storm to form. (4 marks)
Explain the difference between a primary and a secondary impact of a hazard. (2 marks)
Explain how plates move at a destructive plate boundary. (4 marks)
Explain why an earthquake causes more deaths in an LIDC than in an AC. (4 marks)
Explain how ice cores provide evidence for past climate change. (4 marks)
Explain how two natural factors can cause climate change. (4 marks)
Assess whether mitigation or adaptation is the better response to climate change. (6 marks)

Solutions

Q1: Rising air at the Equator cools and rains out its moisture, spreads polewards in the Hadley cell, and sinks at about 30 degrees, where it warms and dries, creating high pressure and clear skies, so little rain falls and deserts form.
Q2: Ocean water above about 27 degrees Celsius and at least 60 to 70 metres deep, warm moist air rising and condensing to release latent heat, low wind shear, and enough Coriolis effect (about 5 to 30 degrees of latitude) to make the storm spin.
Q3: A primary impact happens immediately and directly from the event (buildings collapsing in an earthquake); a secondary impact is a knock-on effect that follows (disease from contaminated water).
Q4: A dense oceanic plate is subducted beneath a continental plate; the cold sinking slab drags the plate behind it (slab pull), the descending plate melts to feed explosive volcanoes, and friction as plates lock and slip causes earthquakes.
Q5: The LIDC has weaker buildings that collapse, limited emergency services and money for rescue and recovery, and possibly slower warnings, so the same magnitude event kills more people than in a wealthy, well-prepared AC.
Q6: Annual snow compacts into ice layers that trap air bubbles; analysing the bubbles gives past carbon dioxide levels and the ice chemistry gives the temperature, building a record of climate through the Quaternary.
Q7: Any two: orbital (Milankovitch) cycles altering solar radiation received; sunspot activity changing the Sun's output; volcanic eruptions reflecting sunlight and cooling the climate.
Q8: Mitigation (renewables, afforestation, agreements) tackles the cause but is slow and needs global cooperation; adaptation (flood defences, drought-resistant crops) protects people now but does not stop warming; the strongest judgement is that both are needed together.

Sources & how we know this

OCR GCSE (9-1) Geography B (J384) specification — OCR (2016)