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Geography

2 Dec 2025

622

17 pages

Comprehensive Geography Knowledge Organisers for OCR B

B

Benz in nenz @nenzinabenz

This GCSE Geography guide covers the essential topics you need to master for your OCR B exam. From... Show more

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

GCSE Geography Overview

You've got eight major topics to tackle in your GCSE Geography course, and each one connects to real-world issues happening right now. Global Hazards explores natural disasters like earthquakes and hurricanes, while UK in the 21st Century examines how our country is evolving. Distinctive Landscapes looks at the physical features that make places unique.

The course also covers Changing Climate - one of the biggest challenges facing our planet today. Dynamic Development helps you understand why some countries are wealthy whilst others struggle with poverty. Resource Reliance examines how we depend on natural resources, and Sustaining Ecosystems focuses on protecting our environment.

Finally, Urban Futures explores how cities are growing and changing. These topics aren't just academic - they're about understanding the world you're living in and the challenges you'll face as adults.

Quick Tip Don't forget to check out SWA Geography's YouTube channel for extra revision support and podcasts that make these topics come alive!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Global Air Circulation and Climate Patterns

The global circulation system is basically Earth's way of moving heat around the planet - think of it as a massive air conditioning system. Three main circulation cells do most of the work Hadley cells thelargest,stretchingfromtheequatortoabout3040°northandsouththe largest, stretching from the equator to about 30-40° north and south, Ferrel cells themiddleonesbetween6070°latitudethe middle ones between 60-70° latitude, and Polar cells (the smallest, covering the poles).

This system creates distinct climate zones that you can see on any world map. Tropical climates around the equator get heavy rainfall and thunderstorms (like Brazil), whilst desert climates at 30° north and south stay hot and dry (think Libya). Temperate climates like the UK sit between 50-60° and get frequent rainfall, whilst polar climates stay cold and windy.

High and low pressure systems drive our daily weather. When cold air sinks, it creates high pressure and clear, calm weather. When hot air rises, you get low pressure, which brings stormy, cloudy conditions. Understanding this helps explain why some places are naturally wetter or drier than others.

Remember Air always moves from high pressure to low pressure areas - this creates wind, which can range from gentle trade winds to powerful jet streams travelling at 225km/h!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Earth's Structure and Tectonic Activity

Imagine Earth as a giant onion with different layers. The crust 510kmthickunderoceans5-10km thick under oceans sits on top of the mantle 2,900kmofsuperhot,liquidrock2,900km of super-hot, liquid rock, which surrounds the core (the hottest bit at 5,000°C, made of iron and nickel). Convection currents in the mantle work like a lava lamp - hot rock rises, cools, then sinks, creating a circular movement that drags tectonic plates around.

Plate boundaries come in different types, each creating specific hazards. Destructive margins occur when one plate slides under another, creating volcanoes and earthquakes. Constructive margins happen where plates pull apart, forming new ocean floor and gentle volcanic activity. Conservative margins see plates sliding past each other, causing earthquakes but no volcanoes.

Volcanoes vary depending on where they form. Shield volcanoes create gentle slopes with predictable, less dangerous eruptions. Composite volcanoes are the dangerous ones - they're explosive and unpredictable because pressure builds up in the magma chamber. Some volcanoes form at hotspots away from plate boundaries, like the Hawaiian islands.

Case Study Alert Iceland's Eyjafjallajökull eruption in 2010 shows how even small volcanic events can have massive global impacts - it cancelled 17,000 flights across Europe!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

UK Physical Geography and Population

The UK's landscape tells a story shaped by geology, climate, and human activity. Mountains dominate the north and west (Scotland, Wales) where it's wetter and sparsely populated, whilst the south and east are flatter, drier, and packed with people. This pattern exists because prevailing winds from the southwest bring moisture that gets dumped on upland areas through relief rainfall, leaving the east in a rain shadow.

Water stress affects the southeast because that's where most people live but least rain falls. The UK tackles this through water transfer schemes - moving water from wet areas to dry ones via pipelines. The country also builds reservoirs and promotes water conservation to meet growing demands.

Population distribution isn't random - it follows clear patterns. Very high density around London and the southeast reflects job opportunities and good transport links. Much of northern Scotland stays sparse due to mountains and harsh climate. The UK's growing population (heading towards 70 million by 2030) creates a housing shortage because we're only building half the 240,000 homes needed annually.

The Demographic Transition Model shows the UK in stage 4, with low birth and death rates creating slow population growth. However, an ageing population means more people over 65, especially in coastal areas, creating challenges for healthcare and pensions.

Key Insight The UK's physical geography directly influences where people live, work, and face challenges - understanding this connection is crucial for your exam!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

UK's Changing Society and Economy

Modern Britain is incredibly diverse - 13% of the population was born abroad, rising to 37% in London. This ethnic diversity has transformed British culture, influencing everything from food (curry is now a national dish) to music and fashion. The UK has genuinely become a multicultural society where different traditions blend together.

The UK's economy has shifted dramatically from heavy manufacturing to service industries like finance, technology, and media. This change accelerated after the 2008 recession, with quaternary industries hightech,researchbasedworkhigh-tech, research-based work growing whilst manufacturing declined due to cheaper labour abroad. Most economic growth now happens in economic hubs like Cambridge, which combines world-class universities with high-tech companies.

Regional differences are stark across the UK. Scotland's Silicon Glen focuses on electronics, whilst Belfast's Titanic Quarter has become a media hub. Cambridge stands out as a science city with over 4,000 knowledge-intensive companies and incomes 34% higher than the national average. However, high costs push many graduates away.

Britain's global influence extends far beyond its size. The UK plays key roles in NATO, the UN Security Council, and G7, whilst British media exports like Harry Potter reach 200 territories. The country's multicultural identity and English language help spread British culture worldwide, attracting tourists and maintaining international connections.

Think About It How has the shift from manufacturing to services affected your local area? Look for evidence of old industrial sites being converted to new uses!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Distinctive UK Landscapes

British landscapes are like a geographical story book - each region tells you about the rocks, climate, and human activity that shaped it. The UK's varied geology includes hard igneous rocks (formed from cooled lava), layered sedimentary rocks (made from weathered fragments), and twisted metamorphic rocks (changed by heat and pressure). These different rock types create everything from Scotland's dramatic mountains to East Anglia's flat farmland.

Glaciation left a massive mark during ice ages, carving U-shaped valleys and creating the steep mountain peaks you see in upland areas today. When the ice melted, it revealed deep valleys and deposited sediment that now forms fertile lowlands. Climate continues shaping landscapes through freeze-thaw weathering in upland areas, where water freezes in rock cracks and splits them apart.

Human impact has been enormous over thousands of years. Most of Britain's original woodland disappeared long ago, replaced by farmland, cities, and infrastructure. Mass movement occurs where slopes become unstable - heavy rain saturates permeable rock above impermeable rock, creating landslides when the weight becomes too much.

The contrast between upland and lowland Britain couldn't be clearer. Uplands experience harsh weather, thin soils, and coniferous forests, whilst lowlands enjoy milder conditions, deep fertile soils, and deciduous woodland. This explains why most people live in lowland areas.

Field Tip Next time you're outdoors, try to identify whether you're looking at weathering, erosion, or deposition - these processes are happening everywhere around you!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Coastal and River Processes

Coastal landscapes constantly change through erosion, transportation, and deposition. Hydraulic action occurs when waves crash into cliffs, compressing air in cracks and gradually widening them. Abrasion happens when waves hurl rocks at cliff bases, whilst attrition rounds and smooths rocks as they bash together. These processes create spectacular features like the coastal stacks at Old Harry Rocks in Dorset.

Longshore drift moves material along beaches in a zigzag pattern. Swash carries material up the beach at the angle of prevailing winds, whilst backwash pulls it straight down due to gravity. This process creates spits - curved beaches that extend into the sea until they reach river estuaries, often developing salt marshes in their sheltered areas.

River landscapes change from source to mouth. In the upper course, steep gradients give rivers energy to erode vertically, creating V-shaped valleys and waterfalls. The middle course sees gentler gradients and lateral erosion, forming meanders. The lower course features deposition, creating floodplains and oxbow lakes when meanders get cut off.

Management strategies vary between hard and soft engineering. Hard defences like sea walls and groynes provide immediate protection but can be expensive and cause problems elsewhere. Soft approaches like beach nourishment and managed retreat work with natural processes but require ongoing maintenance.

Case Study Connection Walton-on-the-Naze demonstrates how coastal management requires multiple strategies working together - no single solution fits every situation!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Climate Change Evidence and Causes

Climate change isn't new - Earth's temperature has fluctuated for millions of years. During the Quaternary period (last 2.6 million years), we've seen ice ages followed by warmer interglacial periods. Scientists know this from ice cores (which trap ancient atmospheres), ocean sediments (showing changing conditions), and fossil evidence (revealing past environments).

However, recent change is different. Global temperature data shows average temperatures have risen 0.6°C since 1950, whilst ice sheets and glaciers are melting rapidly - Arctic sea ice has declined 10% in 30 years. Sea levels have risen 10-20cm in the past century due to thermal expansion of warming oceans and melting ice.

The enhanced greenhouse effect explains what's happening. Naturally, greenhouse gases keep Earth 33°C warmer than it would be otherwise - without them, average temperature would be -18°C instead of +15°C. But burning fossil fuels adds extra carbon dioxide, methane, nitrous oxide, and halocarbons to the atmosphere, trapping more heat.

Responsibility varies globally. LIDCs like Kenya emit very little because they're not industrialised. EDCs like China and India are rapidly increasing emissions as they develop. ACs like the USA and UK have high per-capita emissions due to energy-intensive lifestyles, though some are now reducing total emissions.

Key Point The link between rising CO₂ levels and global temperatures is undeniable - this correlation provides the strongest evidence for human-caused climate change!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Climate Change Impacts and Responses

Global impacts of climate change are already visible and accelerating. Extreme weather events like Hurricane Haiyan (2013) are becoming more frequent and powerful. Rising sea levels threaten island nations - the Maldives could disappear entirely. Food security faces challenges as changing rainfall patterns disrupt agriculture, forcing countries like Russia to ban crop exports during droughts.

Climate refugees represent a growing humanitarian crisis as people flee sea level rise, droughts, and extreme weather. Disease patterns are shifting too - warmer temperatures allow malaria mosquitoes to spread to new areas, whilst floods increase waterborne diseases like dysentery.

The UK faces mixed impacts. Negative effects include increased coastal flooding, water shortages (especially affecting London), extreme rainfall causing flash floods, and heat-related health problems. However, there are positive aspects - tourism might increase, farmers could grow new crops, and heating costs will fall.

Tuvalu provides a stark example of climate change reality. This Pacific island nation faces saltwater contamination of freshwater supplies, coastal erosion destroying farmland, and coral reef destruction reducing fish stocks. The government is exploring migration agreements with New Zealand whilst building sea walls and campaigning for global emissions reductions.

International cooperation is essential. The Paris Agreement (2015) saw 195 countries commit to limiting warming below 2°C, though achieving this requires massive changes in how we produce and use energy.

Think Global, Act Local Climate change impacts vary by location, but the solutions require both international cooperation and individual action!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Development and Global Inequalities

Development means improving living standards through better use of resources. It's not just about money - economic development involves industrialisation and technology, social development includes clean water and education, whilst environmental development focuses on protecting natural resources for future generations.

Measuring development requires different indicators. GDP per capita shows economic wealth, but life expectancy, literacy rates, and infant mortality reveal social conditions. The Human Development Index (HDI) combines these into a single number, giving a more complete picture than economic measures alone.

Global development is highly uneven. LIDCs (Least Developed Countries) struggle with poverty, disease, and limited infrastructure. EDCs (Emerging and Developing Countries) are experiencing rapid economic growth but face challenges like pollution and inequality. ACs (Advanced Countries) enjoy high living standards but consume disproportionate resources.

Physical factors affecting development include natural resources (oil, minerals, water), climate (reliable rainfall for farming), natural hazards (earthquakes, droughts), and location (landlocked countries struggle with trade). Human factors include education (creating skilled workforces), healthcare (keeping people productive), politics (stable governments attract investment), and trade relationships.

Understanding these patterns helps explain why wealth, health, and education vary so dramatically between countries, and why international cooperation is essential for addressing global challenges.

Development Insight No country develops in isolation - global connections through trade, aid, and migration create opportunities but also dependencies!

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This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

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Thomas R

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Basil

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David K

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Xander S

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Paul T

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Geography

622

2 Dec 2025

17 pages

Comprehensive Geography Knowledge Organisers for OCR B

B

Benz in nenz

@nenzinabenz

This GCSE Geography guide covers the essential topics you need to master for your OCR B exam. From understanding global hazards and the UK's changing landscape to tackling climate change and development patterns, these concepts will help you make sense... Show more

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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GCSE Geography Overview

You've got eight major topics to tackle in your GCSE Geography course, and each one connects to real-world issues happening right now. Global Hazards explores natural disasters like earthquakes and hurricanes, while UK in the 21st Century examines how our country is evolving. Distinctive Landscapes looks at the physical features that make places unique.

The course also covers Changing Climate - one of the biggest challenges facing our planet today. Dynamic Development helps you understand why some countries are wealthy whilst others struggle with poverty. Resource Reliance examines how we depend on natural resources, and Sustaining Ecosystems focuses on protecting our environment.

Finally, Urban Futures explores how cities are growing and changing. These topics aren't just academic - they're about understanding the world you're living in and the challenges you'll face as adults.

Quick Tip: Don't forget to check out SWA Geography's YouTube channel for extra revision support and podcasts that make these topics come alive!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Global Air Circulation and Climate Patterns

The global circulation system is basically Earth's way of moving heat around the planet - think of it as a massive air conditioning system. Three main circulation cells do most of the work: Hadley cells thelargest,stretchingfromtheequatortoabout3040°northandsouththe largest, stretching from the equator to about 30-40° north and south, Ferrel cells themiddleonesbetween6070°latitudethe middle ones between 60-70° latitude, and Polar cells (the smallest, covering the poles).

This system creates distinct climate zones that you can see on any world map. Tropical climates around the equator get heavy rainfall and thunderstorms (like Brazil), whilst desert climates at 30° north and south stay hot and dry (think Libya). Temperate climates like the UK sit between 50-60° and get frequent rainfall, whilst polar climates stay cold and windy.

High and low pressure systems drive our daily weather. When cold air sinks, it creates high pressure and clear, calm weather. When hot air rises, you get low pressure, which brings stormy, cloudy conditions. Understanding this helps explain why some places are naturally wetter or drier than others.

Remember: Air always moves from high pressure to low pressure areas - this creates wind, which can range from gentle trade winds to powerful jet streams travelling at 225km/h!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Earth's Structure and Tectonic Activity

Imagine Earth as a giant onion with different layers. The crust 510kmthickunderoceans5-10km thick under oceans sits on top of the mantle 2,900kmofsuperhot,liquidrock2,900km of super-hot, liquid rock, which surrounds the core (the hottest bit at 5,000°C, made of iron and nickel). Convection currents in the mantle work like a lava lamp - hot rock rises, cools, then sinks, creating a circular movement that drags tectonic plates around.

Plate boundaries come in different types, each creating specific hazards. Destructive margins occur when one plate slides under another, creating volcanoes and earthquakes. Constructive margins happen where plates pull apart, forming new ocean floor and gentle volcanic activity. Conservative margins see plates sliding past each other, causing earthquakes but no volcanoes.

Volcanoes vary depending on where they form. Shield volcanoes create gentle slopes with predictable, less dangerous eruptions. Composite volcanoes are the dangerous ones - they're explosive and unpredictable because pressure builds up in the magma chamber. Some volcanoes form at hotspots away from plate boundaries, like the Hawaiian islands.

Case Study Alert: Iceland's Eyjafjallajökull eruption in 2010 shows how even small volcanic events can have massive global impacts - it cancelled 17,000 flights across Europe!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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UK Physical Geography and Population

The UK's landscape tells a story shaped by geology, climate, and human activity. Mountains dominate the north and west (Scotland, Wales) where it's wetter and sparsely populated, whilst the south and east are flatter, drier, and packed with people. This pattern exists because prevailing winds from the southwest bring moisture that gets dumped on upland areas through relief rainfall, leaving the east in a rain shadow.

Water stress affects the southeast because that's where most people live but least rain falls. The UK tackles this through water transfer schemes - moving water from wet areas to dry ones via pipelines. The country also builds reservoirs and promotes water conservation to meet growing demands.

Population distribution isn't random - it follows clear patterns. Very high density around London and the southeast reflects job opportunities and good transport links. Much of northern Scotland stays sparse due to mountains and harsh climate. The UK's growing population (heading towards 70 million by 2030) creates a housing shortage because we're only building half the 240,000 homes needed annually.

The Demographic Transition Model shows the UK in stage 4, with low birth and death rates creating slow population growth. However, an ageing population means more people over 65, especially in coastal areas, creating challenges for healthcare and pensions.

Key Insight: The UK's physical geography directly influences where people live, work, and face challenges - understanding this connection is crucial for your exam!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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UK's Changing Society and Economy

Modern Britain is incredibly diverse - 13% of the population was born abroad, rising to 37% in London. This ethnic diversity has transformed British culture, influencing everything from food (curry is now a national dish) to music and fashion. The UK has genuinely become a multicultural society where different traditions blend together.

The UK's economy has shifted dramatically from heavy manufacturing to service industries like finance, technology, and media. This change accelerated after the 2008 recession, with quaternary industries hightech,researchbasedworkhigh-tech, research-based work growing whilst manufacturing declined due to cheaper labour abroad. Most economic growth now happens in economic hubs like Cambridge, which combines world-class universities with high-tech companies.

Regional differences are stark across the UK. Scotland's Silicon Glen focuses on electronics, whilst Belfast's Titanic Quarter has become a media hub. Cambridge stands out as a science city with over 4,000 knowledge-intensive companies and incomes 34% higher than the national average. However, high costs push many graduates away.

Britain's global influence extends far beyond its size. The UK plays key roles in NATO, the UN Security Council, and G7, whilst British media exports like Harry Potter reach 200 territories. The country's multicultural identity and English language help spread British culture worldwide, attracting tourists and maintaining international connections.

Think About It: How has the shift from manufacturing to services affected your local area? Look for evidence of old industrial sites being converted to new uses!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Distinctive UK Landscapes

British landscapes are like a geographical story book - each region tells you about the rocks, climate, and human activity that shaped it. The UK's varied geology includes hard igneous rocks (formed from cooled lava), layered sedimentary rocks (made from weathered fragments), and twisted metamorphic rocks (changed by heat and pressure). These different rock types create everything from Scotland's dramatic mountains to East Anglia's flat farmland.

Glaciation left a massive mark during ice ages, carving U-shaped valleys and creating the steep mountain peaks you see in upland areas today. When the ice melted, it revealed deep valleys and deposited sediment that now forms fertile lowlands. Climate continues shaping landscapes through freeze-thaw weathering in upland areas, where water freezes in rock cracks and splits them apart.

Human impact has been enormous over thousands of years. Most of Britain's original woodland disappeared long ago, replaced by farmland, cities, and infrastructure. Mass movement occurs where slopes become unstable - heavy rain saturates permeable rock above impermeable rock, creating landslides when the weight becomes too much.

The contrast between upland and lowland Britain couldn't be clearer. Uplands experience harsh weather, thin soils, and coniferous forests, whilst lowlands enjoy milder conditions, deep fertile soils, and deciduous woodland. This explains why most people live in lowland areas.

Field Tip: Next time you're outdoors, try to identify whether you're looking at weathering, erosion, or deposition - these processes are happening everywhere around you!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

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Coastal and River Processes

Coastal landscapes constantly change through erosion, transportation, and deposition. Hydraulic action occurs when waves crash into cliffs, compressing air in cracks and gradually widening them. Abrasion happens when waves hurl rocks at cliff bases, whilst attrition rounds and smooths rocks as they bash together. These processes create spectacular features like the coastal stacks at Old Harry Rocks in Dorset.

Longshore drift moves material along beaches in a zigzag pattern. Swash carries material up the beach at the angle of prevailing winds, whilst backwash pulls it straight down due to gravity. This process creates spits - curved beaches that extend into the sea until they reach river estuaries, often developing salt marshes in their sheltered areas.

River landscapes change from source to mouth. In the upper course, steep gradients give rivers energy to erode vertically, creating V-shaped valleys and waterfalls. The middle course sees gentler gradients and lateral erosion, forming meanders. The lower course features deposition, creating floodplains and oxbow lakes when meanders get cut off.

Management strategies vary between hard and soft engineering. Hard defences like sea walls and groynes provide immediate protection but can be expensive and cause problems elsewhere. Soft approaches like beach nourishment and managed retreat work with natural processes but require ongoing maintenance.

Case Study Connection: Walton-on-the-Naze demonstrates how coastal management requires multiple strategies working together - no single solution fits every situation!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Climate Change Evidence and Causes

Climate change isn't new - Earth's temperature has fluctuated for millions of years. During the Quaternary period (last 2.6 million years), we've seen ice ages followed by warmer interglacial periods. Scientists know this from ice cores (which trap ancient atmospheres), ocean sediments (showing changing conditions), and fossil evidence (revealing past environments).

However, recent change is different. Global temperature data shows average temperatures have risen 0.6°C since 1950, whilst ice sheets and glaciers are melting rapidly - Arctic sea ice has declined 10% in 30 years. Sea levels have risen 10-20cm in the past century due to thermal expansion of warming oceans and melting ice.

The enhanced greenhouse effect explains what's happening. Naturally, greenhouse gases keep Earth 33°C warmer than it would be otherwise - without them, average temperature would be -18°C instead of +15°C. But burning fossil fuels adds extra carbon dioxide, methane, nitrous oxide, and halocarbons to the atmosphere, trapping more heat.

Responsibility varies globally. LIDCs like Kenya emit very little because they're not industrialised. EDCs like China and India are rapidly increasing emissions as they develop. ACs like the USA and UK have high per-capita emissions due to energy-intensive lifestyles, though some are now reducing total emissions.

Key Point: The link between rising CO₂ levels and global temperatures is undeniable - this correlation provides the strongest evidence for human-caused climate change!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Climate Change Impacts and Responses

Global impacts of climate change are already visible and accelerating. Extreme weather events like Hurricane Haiyan (2013) are becoming more frequent and powerful. Rising sea levels threaten island nations - the Maldives could disappear entirely. Food security faces challenges as changing rainfall patterns disrupt agriculture, forcing countries like Russia to ban crop exports during droughts.

Climate refugees represent a growing humanitarian crisis as people flee sea level rise, droughts, and extreme weather. Disease patterns are shifting too - warmer temperatures allow malaria mosquitoes to spread to new areas, whilst floods increase waterborne diseases like dysentery.

The UK faces mixed impacts. Negative effects include increased coastal flooding, water shortages (especially affecting London), extreme rainfall causing flash floods, and heat-related health problems. However, there are positive aspects - tourism might increase, farmers could grow new crops, and heating costs will fall.

Tuvalu provides a stark example of climate change reality. This Pacific island nation faces saltwater contamination of freshwater supplies, coastal erosion destroying farmland, and coral reef destruction reducing fish stocks. The government is exploring migration agreements with New Zealand whilst building sea walls and campaigning for global emissions reductions.

International cooperation is essential. The Paris Agreement (2015) saw 195 countries commit to limiting warming below 2°C, though achieving this requires massive changes in how we produce and use energy.

Think Global, Act Local: Climate change impacts vary by location, but the solutions require both international cooperation and individual action!

# 9-1 GCSE OCR B
# Geography Knowledge
# Organisers
1. Global Hazards
2. UK in the 21^{st} Century
3. Distinctive Landscapes
4. Changing Cli

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Development and Global Inequalities

Development means improving living standards through better use of resources. It's not just about money - economic development involves industrialisation and technology, social development includes clean water and education, whilst environmental development focuses on protecting natural resources for future generations.

Measuring development requires different indicators. GDP per capita shows economic wealth, but life expectancy, literacy rates, and infant mortality reveal social conditions. The Human Development Index (HDI) combines these into a single number, giving a more complete picture than economic measures alone.

Global development is highly uneven. LIDCs (Least Developed Countries) struggle with poverty, disease, and limited infrastructure. EDCs (Emerging and Developing Countries) are experiencing rapid economic growth but face challenges like pollution and inequality. ACs (Advanced Countries) enjoy high living standards but consume disproportionate resources.

Physical factors affecting development include natural resources (oil, minerals, water), climate (reliable rainfall for farming), natural hazards (earthquakes, droughts), and location (landlocked countries struggle with trade). Human factors include education (creating skilled workforces), healthcare (keeping people productive), politics (stable governments attract investment), and trade relationships.

Understanding these patterns helps explain why wealth, health, and education vary so dramatically between countries, and why international cooperation is essential for addressing global challenges.

Development Insight: No country develops in isolation - global connections through trade, aid, and migration create opportunities but also dependencies!

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