CCEA GCSE Geography

Weather vs Climate

Weather = day-to-day atmospheric conditions (temperature, rainfall, wind) in a specific place. Climate = average weather conditions measured over at least 30 years.

Factors Affecting Climate

• Latitude — places closer to the equator receive more direct sunlight
• Altitude — temperature drops approx. 1°C per 100m of height gained
• Distance from sea — the sea moderates temperatures (maritime = mild winters, cool summers; continental = hot summers, cold winters)
• Ocean currents — the North Atlantic Drift brings warm water to NW Europe, keeping winters milder
• Prevailing winds — winds from the sea bring moisture and mild temperatures

Air Masses Affecting the UK & Ireland

Air Mass	Origin	Characteristics
Tropical Maritime (Tm)	Atlantic/SW	Warm, moist — mild, cloudy, rainy
Tropical Continental (Tc)	N. Africa/SE	Warm, dry — heatwaves in summer
Polar Maritime (Pm)	N. Atlantic/NW	Cool, moist — showers, cool weather
Polar Continental (Pc)	Siberia/E	Cold, dry — very cold winters, snow
Arctic Maritime (Am)	Arctic/N	Very cold, moist — snow, sleet

Tropical Storms

Tropical storms (hurricanes/typhoons/cyclones) form over warm ocean water (≥27°C) between latitudes 5°–20° north and south of the equator.

Formation conditions:

• Sea temperature at least 27°C to a depth of 60m
• Located at least 5° from the equator (for Coriolis effect to spin the storm)
• Low wind shear (winds at different heights moving at similar speeds)

Effects: strong winds (>120 km/h), heavy rainfall, storm surges, flooding, destruction of buildings and infrastructure, loss of life, crop destruction.

Responses: prediction and tracking, evacuation plans, emergency shelters, building design (hurricane straps, reinforced roofs), international aid.

Drought

An extended period of below-average rainfall leading to water shortages. Effects include crop failure, famine, water conflict, ecosystem damage. Responses include water conservation, irrigation technology, drought-resistant crops.

UK Weather Hazards

The UK/Ireland experiences flooding (winter storms), heatwaves, cold snaps, and strong winds. These are less extreme than tropical hazards but still cause economic damage and disruption.

Evidence for Climate Change

• Ice cores — trapped air bubbles show past CO₂ levels and temperatures
• Sea level records — global sea levels have risen ~20cm since 1900
• Temperature records — global average temperature has risen ~1.1°C since pre-industrial times
• Glacier retreat — glaciers worldwide are shrinking
• Phenological records — earlier flowering, bird migration changes

Causes

Natural causes: orbital changes (Milankovitch cycles), volcanic eruptions (ash blocking sunlight), solar output variations.

Human causes (enhanced greenhouse effect):

• Burning fossil fuels — releases CO₂
• Deforestation — fewer trees to absorb CO₂
• Agriculture — methane from livestock, rice paddies
• Industry — cement production, CFCs

Effects

• Rising sea levels → coastal flooding, loss of low-lying land
• More extreme weather events (droughts, storms, heatwaves)
• Ice cap/glacier melting → habitats lost, sea level rise
• Ecosystem disruption — coral bleaching, species migration
• Food/water insecurity in vulnerable regions

Responses

Mitigation (reducing the causes): renewable energy, carbon capture, international agreements (Paris Agreement 2015), carbon taxes, reducing deforestation.

Adaptation (living with the effects): flood defences, drought-resistant crops, building design, managed retreat from coasts.

What Is an Ecosystem?

A community of living organisms (biotic) interacting with non-living components (abiotic — climate, soil, water, light) in a specific environment.

Biomes

Large-scale ecosystems determined by climate. Major biomes: tropical rainforest, hot desert, savanna, temperate deciduous forest, boreal/taiga, tundra.

Food Chains & Webs

Producer (plant) → Primary consumer (herbivore) → Secondary consumer (carnivore) → Tertiary consumer (top predator). A food web shows the interconnected food chains within an ecosystem.

Nutrient Cycling

In tropical rainforests, the biomass store is largest and nutrient cycling is rapid (warm, wet conditions speed decomposition). In hot deserts, all stores are small due to limited vegetation.

Climate

Hot and wet all year: average temperature 25–28°C, annual rainfall 2000–3000mm. No distinct seasons. High humidity.

Structure

Biodiversity & Adaptations

Rainforests contain over 50% of the world's species on just 6% of the land surface.

• Drip tips — pointed leaves shed rainwater quickly
• Buttress roots — wide, shallow roots support tall trees in thin soil
• Lianas — climbing plants reach the canopy for sunlight
• Epiphytes — plants grow on branches to access light

Deforestation

Causes: logging, cattle ranching, palm oil plantations, mining, road building, subsistence farming.

Effects: habitat loss and species extinction, increased CO₂ (trees no longer absorbing carbon), soil erosion (roots no longer holding soil), local climate change (less transpiration = less rainfall), loss of indigenous peoples' homes.

Sustainable Management

• Selective logging — only felling some trees, allowing regeneration
• Ecotourism — generating income while preserving the forest
• International agreements — REDD+ (Reducing Emissions from Deforestation)
• Education — teaching local communities sustainable farming methods

Climate

Very hot days (up to 50°C), cold nights (can drop below 0°C). Rainfall less than 250mm per year. Large daily temperature range due to lack of cloud cover and low humidity.

Landforms

• Sand dunes — formed by wind deposition (barchan and longitudinal types)
• Mesas and buttes — flat-topped hills formed by differential erosion
• Wadis — dry river valleys that fill during rare rainfall events
• Mushroom rocks/pedestal rocks — wind erosion (abrasion) wears away base faster than top

Adaptations

• Plants: cacti have shallow, widespread roots and store water in thick stems; small/waxy leaves reduce water loss; some seeds lie dormant for years until rain
• Animals: nocturnal behaviour (avoid daytime heat), large ears for cooling (e.g. fennec fox), camels store fat in humps and conserve water

Desertification

The spread of desert-like conditions into previously semi-arid land.

Causes: overgrazing, over-cultivation, deforestation, climate change (reduced rainfall), population growth.

Solutions: planting trees (Great Green Wall project in Africa), improved irrigation, using appropriate technology, reducing livestock numbers.

Development Opportunities & Challenges

Opportunities: solar energy (abundant sunshine), mineral extraction (oil, gold), tourism (e.g. Saharan tourism). Challenges: extreme temperatures, water scarcity, remoteness, flash flood risk.

Population Distribution & Density

Distribution = where people live. Density = the number of people per km².

Factors affecting distribution:

• Physical: climate, relief (flat land preferred), water supply, fertile soil, natural resources
• Human: employment, transport links, political stability, historical settlement

Areas of high density: river valleys, coastal plains, urban areas. Areas of low density: deserts, mountains, rainforests, polar regions.

Population Pyramids

Population pyramids show the age-sex structure of a population.

Demographic Transition Model (DTM)

Stage	Birth Rate	Death Rate	Population	Example
1	High	High	Low, stable	Isolated tribes
2	High	Falling	Rapidly growing	Afghanistan
3	Falling	Low	Still growing	Brazil
4	Low	Low	High, stable	UK, NI
5	Very low	Low	Declining	Japan, Germany

Migration

Push factors (reasons to leave): poverty, war, natural disasters, unemployment, persecution.

Pull factors (reasons to go to): better jobs, higher wages, safety, education, family reunification, better quality of life.

What Is Urbanisation?

The increase in the proportion of people living in urban (built-up) areas. Globally, over 56% of people now live in cities.

Causes of Urbanisation

• Rural-urban migration — people move from countryside to cities for jobs, services, and opportunities (pull) or leave due to poverty, lack of services (push)
• Natural increase — higher proportion of young people in cities means more births
• Industrialisation — factories attract workers to cities

Urbanisation Patterns

LICs/NEEs: urbanisation is happening rapidly now. Cities growing fast, often with informal settlements (slums/shanty towns). HICs: urbanisation happened in the 19th/20th century; now some cities are experiencing counter-urbanisation (people moving out to rural areas).

Megacities

Cities with a population over 10 million. Examples: Tokyo (37m), Delhi (32m), Lagos (15m). Most new megacities are in LICs/NEEs, especially in Asia and Africa.

Urban Problems

• Housing shortages — demand outstrips supply, leading to overcrowding and informal settlements in LICs, or high house prices in HICs
• Traffic congestion — too many cars, poor public transport, pollution, long commute times
• Air and noise pollution — from vehicles, factories, construction
• Deprivation — areas of poverty with poor housing, low income, high unemployment, poor health
• Waste management — increased waste generation, landfill issues, litter

Brownfield vs Greenfield

	Brownfield Sites	Greenfield Sites
Definition	Previously built-on land (old factories, etc.)	Land never built on before (farmland, countryside)
Advantages	Reduces urban sprawl, near existing services, recycles derelict land	Cheaper to build on, more space, pleasant environment
Disadvantages	Expensive to clean up, may be contaminated, limited space	Destroys habitats, increases commuting, loss of farmland

What Is Sustainability?

Meeting the needs of the present without compromising the ability of future generations to meet their own needs. In cities, this means reducing environmental impact while improving quality of life.

Strategies for Sustainable Urban Living

• Transport: integrated public transport (bus, rail, tram), cycle lanes, congestion charges, park-and-ride schemes, electric vehicles
• Waste: recycling programmes, composting, waste-to-energy plants, reducing single-use plastics
• Green spaces: urban parks, community gardens, green roofs, urban trees (reduce pollution, improve wellbeing)
• Energy: solar panels on buildings, district heating, energy-efficient buildings, insulation
• Water: rainwater harvesting, permeable surfaces, water-efficient appliances

What Is Development?

Development is the progress of a country in terms of economic growth, quality of life, and use of technology. There is a development gap between richer (HICs) and poorer (LICs) countries.

Indicators of Development

Indicator	What It Measures	Limitation
GDP per capita	Total value of goods/services produced divided by population	Doesn't show inequality within a country; ignores informal economy
GNI per capita	Total income earned by a country's citizens (including overseas earnings) divided by population	Averages hide huge wealth gaps; doesn't account for cost of living
HDI	Composite index combining health (life expectancy), education (years of schooling) and income (GNI per capita) on a 0–1 scale	National average hides regional differences; only three dimensions
Life expectancy	Average number of years a newborn is expected to live	Doesn't show quality of life; can be skewed by high infant mortality
Literacy rate	% of adults who can read and write	Doesn't show quality or level of education; varies by definition
Infant mortality rate	Deaths of children under 1 year per 1,000 live births	Doesn't reflect wider healthcare; may be under-reported in LICs
People per doctor	Number of people for each qualified doctor — shows access to healthcare	Doesn't show healthcare quality or distribution (urban vs rural)

Single vs Composite Indicators

Single indicators (e.g. GDP, life expectancy, literacy rate) measure only one dimension of development. They are simple to collect but give an incomplete picture.

Composite indicators (e.g. HDI) combine several measures into one score, giving a broader view of development. The HDI combines:

• Health — life expectancy at birth
• Education — mean years of schooling + expected years of schooling
• Income — GNI per capita (adjusted for purchasing power)

HDI ranges from 0 (lowest development) to 1 (highest). Examples: Norway = 0.961; Niger = 0.394; UK = 0.929.

Limitations of Using Indicators

• Averages hide inequality — GDP per capita does not show how wealth is distributed; a few billionaires can raise the average while millions remain in poverty
• Data reliability — LICs may lack the resources to collect accurate data; some governments may manipulate figures
• Cultural differences — literacy may be defined differently in different countries
• Economic vs social — economic indicators (GDP) don't measure happiness, freedom, or environmental quality
• Informal economy — much economic activity in LICs is not officially recorded (e.g. market trading, subsistence farming)

Physical Causes

• Climate — extreme climates (very hot/cold/dry) make farming and development difficult
• Landlocked countries — no coast = difficulty trading by sea
• Natural hazards — frequent earthquakes, floods, or droughts divert money from development to recovery
• Limited resources — countries without oil, minerals, or fertile soil struggle to generate wealth

Economic Causes

• Trade imbalance — LICs export cheap raw materials and import expensive manufactured goods
• Debt — many LICs owe huge debts to HICs/banks; repayments take money away from development
• Dependence on primary industry — commodity prices are volatile

Historical Causes

• Colonialism — European countries exploited resources and labour from colonies; borders drawn without considering ethnic groups led to conflict

Political Causes

• Corruption — money meant for development stolen or mismanaged
• Conflict/war — destroys infrastructure, displaces people, deters investment
• Poor governance — lack of investment in education, health, infrastructure

Strategies

Strategy	How It Helps	Limitation
Aid	Money/resources from HICs or NGOs fund projects (schools, wells, hospitals). Can be emergency (short-term, after disasters) or development (long-term investment)	Can create dependency; may not reach those who need it (corruption); tied aid may benefit donor country more
Trade	Selling goods internationally generates income and employment; trading blocs and agreements can open up markets	Trade rules often favour HICs; LICs rely on exporting cheap raw materials and importing expensive manufactured goods (unfair terms of trade)
Fairtrade	Guarantees farmers a fair, stable price for their goods (e.g. coffee, cocoa, bananas); provides a social premium for community projects (schools, clean water)	Only helps a small number of producers; products cost more for consumers; the premium may not always reach the poorest workers
Tourism	Creates jobs (hotels, guides, transport), brings foreign currency, funds infrastructure improvements, raises awareness of culture and environment	Low-paid/seasonal jobs; profits may leave the country (economic leakage); environmental damage; local culture may be commercialised
Debt relief	Cancelling or reducing debts frees money for development spending on health, education, and infrastructure	Some governments may borrow again irresponsibly; does not address root causes of poverty
Microfinance	Small loans to individuals (often women) to start businesses; helps people who are too poor for traditional bank loans. Examples: Grameen Bank, Bangladesh	Interest rates can still be high; not everyone succeeds in business; small scale of impact
Intermediate (appropriate) technology	Simple, affordable technology that local people can build and maintain (e.g. hand pumps, clay stoves, solar lanterns)	May not be as efficient as advanced technology; limited impact on large-scale problems

Types of Aid

Type	Description	Example
Bilateral aid	Government-to-government aid	UK gives aid to Ethiopia for education programmes
Multilateral aid	Countries contribute to an international organisation that distributes aid	World Bank funding infrastructure projects
Voluntary/NGO aid	Charities and non-governmental organisations raise and distribute funds	Oxfam, WaterAid, Médecins Sans Frontières
Emergency (short-term) aid	Immediate response to disasters — food, water, shelter, medical supplies	Aid after Haiti earthquake, Typhoon Haiyan
Development (long-term) aid	Investment in infrastructure, education, and healthcare to build capacity	Building schools, training teachers, drilling wells

What Is Globalisation?

The increasing interconnection of the world's economies, cultures, and populations through trade, technology, migration, and communication.

Transnational Corporations (TNCs)

Companies that operate in more than one country (e.g. Nike, Apple, Coca-Cola, Primark). Headquarters usually in HICs; manufacturing often in LICs/NEEs.

	Advantages	Disadvantages
For host country (LIC)	Creates jobs, investment, tax revenue, infrastructure, skills transfer	Low wages, poor working conditions, profits sent back to HIC, environmental damage
For home country (HIC)	Cheaper products, company profits, global influence	Job losses in manufacturing, criticism of exploitation

Resource Supply & Demand

Global demand for food, water and energy is increasing due to population growth, economic development, and rising living standards. Supply is unevenly distributed — some areas have a surplus while others have a deficit.

Food

Food insecurity = not having reliable access to enough affordable, nutritious food. Causes: poverty, conflict, climate change, population growth, land degradation.

Water

Water stress = when demand exceeds supply or when quality is poor. Over 2 billion people lack access to safe drinking water. Causes: population growth, pollution, climate change, over-extraction.

Energy

Energy security = having a reliable supply of energy at affordable prices. Non-renewable sources (fossil fuels) are finite. Renewable sources (wind, solar, hydro, tidal, geothermal, biomass) are sustainable but can be intermittent or expensive to set up.

Food in the UK

The UK imports about 46% of its food. Food miles = the distance food travels from farm to plate. High food miles increase carbon emissions. Solutions: buying local/seasonal food, reducing food waste, allotments and urban farming.

Water in the UK

The north and west of the UK have more rainfall (water surplus) while the south and east have higher population and demand (water deficit). Solutions: water transfer schemes, reservoirs, desalination, water metering, reducing leakage.

Energy in the UK

The UK's energy mix is changing: declining use of coal, increasing use of renewables (especially wind — the UK has excellent offshore wind resources). In 2023, renewables generated over 40% of UK electricity. NI has significant wind energy capacity.

Location & Context

Nigeria is located in West Africa and is the continent's most populous country with over 220 million people. It is classified as a Newly Emerging Economy (NEE) — rapidly developing but still facing significant challenges. Nigeria has Africa's largest economy, largely due to its oil industry.

Indicators of Development

Indicator	Nigeria	UK (for comparison)
GNI per capita	$2,000	$46,000
HDI	0.535 (low)	0.929 (very high)
Life expectancy	53 years	81 years
Literacy rate	62%	99%
Infant mortality	72 per 1,000	4 per 1,000

Causes of Uneven Development Within Nigeria

• North-South divide — the south is more developed with better infrastructure, education, and industry; the north is more rural and poorer
• Oil wealth concentrated — oil revenue benefits elites and Lagos/Abuja but not the Niger Delta communities where oil is extracted
• Corruption — an estimated $400 billion in oil revenue has been stolen or wasted since independence (1960)
• Conflict — Boko Haram insurgency in the north-east has displaced millions and destroyed infrastructure

How Nigeria Is Reducing the Development Gap

• Oil industry — Nigeria is Africa's largest oil producer; oil accounts for ~90% of export earnings but makes the economy vulnerable to oil price changes
• Diversifying the economy — growing technology sector (“Yaba Valley” in Lagos); Nollywood film industry (2nd largest in the world by output); agriculture and manufacturing
• TNCs — companies like Shell, Unilever, and Coca-Cola provide jobs and investment, but can also exploit workers and the environment
• Aid — receives aid for healthcare (polio vaccination campaigns), education, and clean water projects
• Trade — member of the African Union and ECOWAS trading bloc, promoting regional trade
• Microfinance — small loans helping women set up market businesses and farms

Environmental Challenges

• Oil spills in the Niger Delta — devastating pollution of water, farmland, and fishing grounds; health problems for local communities
• Deforestation — logging and farming clearing tropical forest
• Urban pollution — Lagos has severe air pollution and waste management problems

Grid References

4-figure grid reference — identifies a 1km² grid square. Read along the bottom (eastings) then up the side (northings). Example: 2845

6-figure grid reference — pinpoints a location within that square to the nearest 100m. Estimate tenths within each square. Example: 284457

Scale & Distance

OS maps use scales like 1:50,000 (1cm = 500m) or 1:25,000 (1cm = 250m). To measure distance: measure straight-line distance with a ruler, convert using scale. For winding routes, use string or paper edge.

Direction

Use the 8-point compass: N, NE, E, SE, S, SW, W, NW. Grid north is at the top of the map.

Contour Lines

Lines joining points of equal height. Interval is usually 10m. Close contours = steep slope. Far apart = gentle slope. V-shapes pointing uphill = valleys. Concentric circles = hilltops.

Common Map Symbols

Symbol	Meaning	Symbol	Meaning
Blue lines	Rivers/streams	PH	Public house
Green shading	Woodland	Mus	Museum
Brown lines	Contours	P	Parking
FB	Footbridge	PC	Post office
Ch	Church	Sch	School

Drawing a Cross-Section

1. Place the edge of a piece of paper along the line of the cross-section on the map
2. Mark every point where a contour line crosses the paper edge, noting the height
3. Transfer marks to graph paper with a suitable vertical scale
4. Plot each height as a dot and join with a smooth line
5. Add labels: rivers, roads, settlements, steep/gentle slopes

Sketch Maps

A simplified drawing of a real map. Must include:

• Title — what area and what it shows
• North arrow
• Scale (approximate)
• Key with symbols
• Labels for important features

The Enquiry Process

1. Aims — what you want to find out
2. Hypotheses — testable statements you can prove/disprove (e.g. “River velocity increases downstream”)
3. Data collection — primary (collected yourself) and secondary (from other sources)
4. Data presentation — graphs, maps, charts
5. Analysis & conclusions — what does the data show? Was the hypothesis supported?
6. Evaluation — what were the limitations? How could you improve?

Sampling Methods

Method	Description	Advantage	Disadvantage
Random	Sites chosen using random number generator	No bias in selection	May miss key areas, unrepresentative
Systematic	Sites at regular intervals (e.g. every 100m)	Good coverage, easy to repeat	May miss patterns between points
Stratified	Area divided into sub-groups, then samples taken from each	Ensures all areas represented	Need prior knowledge to create sub-groups

Primary Data Collection

• Questionnaires — asking people questions (open or closed questions). Must be unbiased, large enough sample
• Traffic/pedestrian counts — tallying vehicles or people at set points and times
• River measurements — width (tape measure across), depth (metre ruler), velocity (flow meter or timing a float over 10m), bedload size (measuring pebble axes)
• Environmental quality surveys — scoring factors like litter, noise, vegetation on a scale (e.g. 1–5)
• Field sketches — annotated drawings of landscapes/features
• Photographs — used as evidence, taken from same angle for comparison

Secondary Data

Data collected by others: census data, OS maps, weather records, satellite images, newspaper articles, Environment Agency flood data.

Presentation Methods

Method	Best Used For	Example
Bar charts	Comparing categories	Pedestrian counts at different sites
Line graphs	Showing change over time/distance	River velocity downstream
Pie charts	Showing proportions	Land use types in an area
Scatter graphs	Showing relationship between two variables	Distance downstream vs river width
Choropleth maps	Showing how values differ across areas	Population density by region
Proportional symbols	Showing quantities at specific locations	City populations on a map
Isoline maps	Showing values along lines of equal measurement	Contour maps, weather maps

GIS (Geographical Information Systems)

Computer systems that store, analyse and display geographical data in layers. Used for flood risk mapping, land use planning, route planning, environmental monitoring. Advantages: can overlay multiple datasets, updated easily, accurate analysis. Disadvantage: expensive software, requires training.

Analysis

Describe patterns and trends in your data. Use statistics (mean, median, mode, range) to summarise. Identify anomalies and try to explain them.

Conclusions

• Refer back to your hypothesis — was it supported or rejected?
• Use evidence (data values) to justify your conclusion
• Link findings to geographical theory (e.g. Bradshaw Model for rivers)

Evaluation

• Reliability — would you get the same results if you repeated the study? How could you improve reliability? (More sites, repeat measurements, larger sample)
• Accuracy — were measurements precise? (Equipment calibration, human error, weather conditions)
• Limitations — time constraints, access issues, weather, small sample size, subjectivity in surveys
• Improvements — more sites, different times/seasons, better equipment, digital data collection

Layers of the Earth

The Earth is made up of four main layers, each with different properties:

Layer	Thickness	Composition	State	Temperature
Crust	5–70 km	Rock (granite & basalt)	Solid	Cool surface
Mantle	~2,900 km	Silicate rock	Semi-molten (flows slowly)	1,000–3,700°C
Outer core	~2,200 km	Iron & nickel	Liquid	4,000–5,000°C
Inner core	~1,200 km radius	Iron & nickel	Solid (extreme pressure)	~5,500°C

Types of Crust

Feature	Oceanic Crust	Continental Crust
Thickness	5–10 km	25–70 km
Density	Denser (heavier)	Less dense (lighter)
Age	Younger (constantly recycled)	Older (up to 4 billion years)
Composition	Basalt	Granite
Can be subducted?	Yes	No (too buoyant)

Continental Drift

In 1912, Alfred Wegener proposed that the continents were once joined in a supercontinent called Pangaea and have since drifted apart. His evidence included:

• Jigsaw fit — the coastlines of South America and Africa fit together like puzzle pieces
• Matching fossils — identical fossils (e.g. Mesosaurus) found on continents now separated by oceans
• Matching rock types — similar rocks and mountain chains found on both sides of the Atlantic
• Glacial deposits — evidence of ancient glaciation found in tropical areas (e.g. India, Africa)

Wegener's theory was initially rejected because he could not explain how the continents moved. It was not until the 1960s that the mechanism was understood.

Convection Currents

The Earth's tectonic plates float on the semi-molten mantle. Heat from the core causes convection currents in the mantle — hot magma rises, spreads out, cools, and sinks. These currents drag the plates on top, causing them to move.

Evidence for Plate Tectonics

• Sea-floor spreading — new crust is created at mid-ocean ridges; magnetic stripes in the rock show the sea floor is spreading outward
• Palaeomagnetism — rocks on either side of mid-ocean ridges show matching patterns of magnetic reversal, proving new rock is being created symmetrically
• Earthquake & volcano distribution — they occur along plate boundaries, not randomly
• GPS measurements — satellites confirm that plates are moving at 2–15 cm per year

Constructive (Divergent) Boundary

Plates move apart. Magma rises to fill the gap, creating new crust. Produces gentle volcanic eruptions and shallow earthquakes.

Features formed: mid-ocean ridges (e.g. Mid-Atlantic Ridge), rift valleys (e.g. East African Rift), shield volcanoes.

Destructive (Convergent) Boundary

Plates move together. There are two sub-types:

Oceanic-Continental: The denser oceanic plate is forced under (subducted) the lighter continental plate. This creates a deep ocean trench, explosive composite volcanoes, and strong earthquakes.

Continental-Continental: Neither plate subducts (both too buoyant). Instead, they crumple upwards, forming fold mountains. Strong earthquakes but no volcanoes.

Example: Indian Plate colliding with Eurasian Plate → Himalayas, Andes (oceanic-continental).

Conservative (Transform) Boundary

Plates slide past each other. Friction causes the plates to lock together, then suddenly jolt — causing powerful earthquakes. No volcanoes (no magma is produced).

Summary Comparison

Feature	Constructive	Destructive	Conservative
Plate movement	Apart	Together	Sliding past
Earthquakes	Mild, shallow	Strong, deep	Very strong
Volcanoes	Yes (gentle)	Yes (explosive)	No
New crust?	Yes (created)	No (destroyed)	No
Landforms	Mid-ocean ridges, rift valleys	Ocean trenches, fold mountains, composite volcanoes	Fault lines
Example	Mid-Atlantic Ridge	Andes, Himalayas	San Andreas Fault

How Earthquakes Occur

Earthquakes happen when tectonic plates become locked together by friction. Pressure builds up over time. When the pressure exceeds the friction, the plates suddenly jolt, releasing stored energy as seismic waves.

• Focus — the point underground where the earthquake originates (where the rock fractures)
• Epicentre — the point on the Earth's surface directly above the focus (where damage is usually greatest)

Seismic Waves

Wave Type	Description	Speed
P-waves (Primary)	Compressional waves; push and pull rock. Travel through solids and liquids.	Fastest — arrive first
S-waves (Secondary)	Shear waves; move rock side to side. Travel through solids only.	Slower than P-waves
Surface waves	Travel along the surface; cause the most damage (rolling and shaking motion).	Slowest

Measuring Earthquakes

Scale	What It Measures	Key Features
Richter Scale	Magnitude (energy released)	Logarithmic (each level is 10x greater). Measured by seismometer. No upper limit. Objective.
Mercalli Scale	Intensity (effects on people/buildings)	Scale of I–XII. Based on observations and damage reports. Subjective.
Moment Magnitude Scale (Mw)	Magnitude (most accurate)	Now preferred by scientists over Richter. Accounts for fault size and movement.

Types of Volcano

Feature	Shield Volcano	Composite (Strato) Volcano	Dome Volcano
Shape	Wide, flat, gently sloping	Tall, steep, cone-shaped	Steep-sided, bulging dome
Eruption type	Gentle, frequent lava flows	Explosive, violent, infrequent	Very explosive, thick lava
Lava type	Thin, runny (basaltic)	Thick and thin layers alternate	Very thick, viscous (acidic)
Boundary	Constructive	Destructive	Destructive
Example	Mauna Loa, Hawaii	Mt St Helens, Eyjafjallajökull	Mt Pelée, Martinique

Volcanic Hazards

• Lava flows — destroy everything in their path but usually slow enough to evacuate
• Pyroclastic flows — superheated clouds of gas, ash, and rock travelling at 700 km/h and 1,000°C; extremely deadly
• Ash clouds — disrupt air travel, collapse roofs, damage crops, breathing hazards
• Lahars — mudflows of volcanic ash and water; bury settlements
• Volcanic gases — toxic gases (CO₂, SO₂) can poison air and water

HIC Case Study: Japan Earthquake & Tsunami (2011)

LIC Case Study: Haiti Earthquake (2010)

Comparing Impacts: HIC vs LIC

Factor	Japan (HIC) 2011	Haiti (LIC) 2010
Magnitude	9.0	7.0
Deaths	~18,500	~230,000
Building quality	Earthquake-resistant, strict building codes	Poorly built, no building codes enforced
Preparation	Regular earthquake drills, warning systems, emergency kits	No warning systems, no preparation
Emergency response	Rapid, well-organised, well-funded	Slow, overwhelmed, dependent on foreign aid
Recovery	Rapid rebuilding, improved defences	Very slow, many still in temporary housing years later

The Four Ps of Managing Tectonic Hazards

Strategy	Description	Examples
Prediction	Monitoring signs that a hazard may occur	Seismometers detect tremors; tiltmeters measure ground swelling near volcanoes; satellite monitoring of gas emissions; animal behaviour changes
Protection	Designing buildings and infrastructure to withstand hazards	Earthquake-resistant buildings (cross-bracing, deep foundations, rubber shock absorbers); lava diversion channels; tsunami sea walls
Planning	Preparing land-use plans and emergency procedures	Hazard mapping (identifying risk zones); avoiding building on fault lines; exclusion zones around volcanoes; evacuation routes planned
Preparation	Educating people and practising responses	Earthquake drills in schools/workplaces; emergency supply kits; tsunami warning sirens; community training; designated shelters

Can We Predict Earthquakes?

Currently, earthquakes cannot be reliably predicted. We can identify areas at risk (seismic hazard maps) and monitor warning signs, but we cannot say exactly when, where, or how strong an earthquake will be. This makes preparation and protection more important than prediction.

Can We Predict Volcanic Eruptions?

Volcanic eruptions are easier to predict than earthquakes. Warning signs include:

• Small earthquakes (tremors) around the volcano
• Ground deformation (bulging, tilting)
• Increased gas emissions (especially SO₂)
• Rising temperature of crater lakes or hot springs

However, not all warning signs lead to eruptions, and some volcanoes erupt with little warning.

How Tsunamis Form

A tsunami is a series of giant ocean waves caused by a sudden displacement of water. They are most commonly triggered by undersea earthquakes at destructive plate boundaries, but can also be caused by volcanic eruptions, underwater landslides, or asteroid impacts.

Tsunami Characteristics

• Travel at up to 800 km/h in deep ocean (as fast as a jet aircraft)
• In deep water: low wave height (<1 m), barely noticeable
• In shallow water: waves slow down and height increases dramatically (up to 30+ metres)
• The sea often recedes (pulls back) before a tsunami hits — this is a warning sign
• A tsunami is a series of waves, not just one — later waves can be even larger

Effects of Tsunamis

Social	Economic	Environmental
Mass casualties and injuries	Destruction of buildings, infrastructure	Saltwater contamination of farmland
Displacement, homelessness	Loss of fishing boats and livelihoods	Coastal ecosystems destroyed
Disease from contaminated water	Massive cost of rebuilding	Debris and pollution in ocean
Psychological trauma	Tourism industry devastated	Coral reefs and mangroves damaged

Tsunami Warning Systems

The Pacific Tsunami Warning Center uses a network of deep-ocean sensors (DART buoys), seismometers, and tide gauges to detect tsunamis. Warnings can be issued within minutes. However, the Indian Ocean had no warning system in place during the devastating 2004 Boxing Day Tsunami (which killed ~230,000 people). A system has since been installed.

Reasons People Live Near Volcanoes & Earthquake Zones

Despite the risks, hundreds of millions of people live near plate boundaries. Key reasons include:

• Fertile soil — volcanic ash weathers into extremely rich soil, ideal for farming (e.g. slopes of Mt Etna, Sicily grow vines and citrus fruits)
• Geothermal energy — volcanic areas provide cheap, renewable energy (e.g. Iceland generates ~25% of its electricity from geothermal sources)
• Tourism — volcanoes and geysers attract tourists, creating jobs and income (e.g. Yellowstone, Mt Vesuvius/Pompeii)
• Minerals and resources — volcanic areas are rich in valuable minerals (gold, silver, copper, diamonds)
• Historical and cultural ties — families have lived in the area for generations; emotional attachment to homeland
• Poverty — people may not have the money or means to relocate elsewhere
• Perception of risk — people may believe “it won't happen to me” or trust that the volcano has been dormant for a long time
• Employment — major cities and industries are located in hazard zones (e.g. Tokyo, San Francisco, Naples)

CCEA GCSE Geography Exam Structure

Unit	Content	Duration	Marks	% of GCSE
Unit 1	Understanding Our Natural World (Physical Geography)	1 hour 30 mins	75 marks	40%
Unit 2	Living in Our World (Human Geography)	1 hour 30 mins	75 marks	40%
Unit 3	Fieldwork & Decision Making	1 hour 30 mins	75 marks	20%

Timing Strategy

Roughly 1 mark = 1 minute. For a 6-mark question, spend about 6–7 minutes. Always leave 5 minutes at the end to check your answers.

• Short answer (1–2 marks): 1–2 minutes
• Medium answer (3–4 marks): 3–5 minutes
• Extended writing (6–8 marks): 8–10 minutes

Command Word	What You Need To Do
Describe	Say what you see / state the features. No reasons needed. Use data if given.
Explain	Give reasons why something happens. Use “because”, “this means”, “as a result”.
Evaluate	Judge the success/importance. Give both sides and a conclusion.
Discuss	Explore different viewpoints or arguments. Give evidence for each.
To what extent	How far do you agree? Weigh up evidence and reach a judgment.
Assess	Consider the importance/value. Similar to evaluate.
Compare	Identify similarities AND differences. Use “whereas”, “both”, “in contrast”.
Suggest	Use your knowledge to propose ideas. There may be no single right answer.
Justify	Give reasons for your choice or decision.
Name/State	Short factual answer. No explanation needed.

Structure

1. Name the case study — always state the specific name and location immediately
2. Set the scene — one sentence of context (where, when, what happened)
3. Specific details — facts, figures, statistics, named places within the case study
4. Link to the question — make sure every point directly answers what was asked

Example

Q: For a named tropical storm, describe its effects. (6 marks)

“Typhoon Haiyan struck the Philippines in November 2013 with winds up to 315 km/h. The storm surge reached 5m in Tacloban, destroying 90% of the city. Over 6,000 people were killed and 4 million displaced. 600,000 homes were destroyed, and 6 million workers lost their source of income. Farmland, particularly rice and coconut crops, was devastated, threatening food security. Infrastructure damage cost an estimated $2 billion.”

Unit 3 Decision-Making Exercise

You will be given a scenario with a resource booklet. You must analyse the resources and make a justified decision.

Approach

1. Read all resources carefully — highlight key data, identify conflicting viewpoints
2. Consider all options — there are usually 2–3 options to evaluate
3. Use the resources — refer to specific data, quotes, maps, graphs from the booklet
4. Apply your knowledge — connect to geographical theory and case studies
5. Make a clear decision — state which option you recommend
6. Justify your choice — explain why your chosen option is best, acknowledging drawbacks of alternatives

1. Describing when asked to explain — always give reasons with “because” for explain questions
2. No case study details — vague answers without names, places, or statistics lose marks
3. Not using data from resources — always quote figures from graphs/tables when provided
4. One-sided evaluations — always discuss both advantages AND disadvantages
5. Mixing up grid references — remember: along the corridor first, up the stairs second
6. Confusing weather and climate — weather = short term, climate = long term (30+ years)
7. Forgetting to conclude — evaluate/discuss questions need a final judgement
8. Poor use of geographical terminology — use proper terms (erosion, deposition, urbanisation) not everyday language
9. Writing too much for low-mark questions — a 1-mark question needs one point, not a paragraph
10. Leaving questions blank — always attempt every question; even partial answers can earn marks
11. Not reading the question properly — underline key words (describe, explain, named example, two reasons)
12. Confusing erosion types — hydraulic action vs abrasion vs attrition — learn the precise definitions