Source: https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-2-water

[Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [A Level](https://senecalearning.com/en-gb/revision-notes/a-level.md) › [Geography](https://senecalearning.com/en-gb/revision-notes/a-level/geography.md) › [Edexcel](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel.md) › Water

# Water

Geography: Edexcel A Level, topic 8.4.2

## Ocean Acidification

The process where the oceans become more acidic can have disastrous impacts on the ecosystems that exist there.

### What is ocean acidificaition?

![What is ocean acidificaition?](https://image-v2.cdn.app.senecalearning.com/2018-08/de57a36a-c449-4ba7-b287-647c333c56fc/gas-smoke-cloud-.jpg)

- Ocean acidification refers to the process of more CO2 being absorbed into the ocean, which means the pH decreases (becomes more acidic).
- When there is a higher concentration of CO2 absorbed into the ocean, it converts largely into carbonic acid (H2CO3 ).
- But if there are lower concentrations of carbon dioxide when the CO2 is absorbed, the carbonate ions promote healthy coral growth.

### Impacts on coral reefs

![Impacts on coral reefs](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/7.3.1-%20Effects%20of%20human%20interactions%20on%20ecosystems/coral-cleach-min.jpg)

- Algae, which live in the tissues of corals, provide carbohydrates to the corals through photosynthesis. A by-product of the algae gives the coral brilliant bright colours.
- Corals can only survive between 23-29oC (never below 18oC).
- Coral bleaching happens when the water is too warm, causing the algae to be ejected and leaving the coral white.
- Climate change is the leading cause of coral bleaching because the ocean temperatures continue to rise.
- Additionally, acidic water makes coral disintegrate.

### Impacts on other life

![Impacts on other life](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/OCR%2021%20Century/6%20-%20Life%20on%20earth/coraf_reef.jpg)

- If coral reefs are lost, there are many other animals that are dependent on them.
- Coral reefs provide shelter for 25% of marine species.
- Coral reefs can provide shorelines protection from storms and large waves.
- The fish that live in the reefs can support local fishing industries.
- Tourism can thrive around coral reefs, especially where scuba diving and snorkelling are possible.

## Effect of Temperatures on Water and Carbon Stores

Increased temperatures are likely to cause the most impact to cold regions, like those found within the Arctic Circle.

### Increased evaporation rates

![Increased evaporation rates](https://image-v2.cdn.app.senecalearning.com/2018-04/eb293c7a-ab94-42a6-9acb-4408d412e30b/shutterstock_122147881.jpg)

- Changes in global temperatures result in increased evaporation rates.
- This is simplified into the phrase ‘wet get wetter and dry get drier’.
- Changes to temperature could lead to changes in the air circulation system. This could result in tropical storms moving further away from the equator as sea surface temperature reaches 27oC in places further away from the equator.

### Drainage basin stores

![Drainage basin stores](https://image-v2.cdn.app.senecalearning.com/2018-08/ca01d70a-67fc-41db-94a2-bab0a324be98/rain-stoppers-1461288_1920.jpg)

- With increased temperature, there is a rise in the rate of evaporation and so in water vapour.
- But due to warmer temperatures, the precipitation falls as rainfall rather than as snow.
- The higher temperatures also mean that snowmelt begins earlier.
- This can alter the river regimes. With higher river discharge in the winter because of higher amounts of rainfall and spring snowmelt happening earlier.

### Drainage basin stores cont.

![Drainage basin stores cont.](https://image-v2.cdn.app.senecalearning.com/2018-08/248e2e44-ad0c-4814-af91-0470e09a352c/glacier-19114_1920.jpg)

- Thawing of permafrost regions can lead to water infiltrating and percolating deeper. Before, this water would have been unable to infiltrate the frozen ground and instead been surface runoff.

## Threats to Ocean Health

Ocean environments provide food, protection and income for the
communities that develop around them. To keep these goods and services, the health of the ocean is of the utmost importance.

### Developing nations

![Developing nations](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/6.3.1%20The%20theory%20of%20evolution/beach-2179361_640-min.jpg)

- The poorest nations will be most dependent on their oceans as food supply and income.
- Climate change results in changes to coastal environments, which leads to changes in the location and amount of species with knock-on impacts for the rest of the food chain.
- The North Atlantic has increased in temperature and the plankton that is used to cooler waters dies. This has a knock-on impact on the rest of the food chain.

### Tourism

![Tourism](https://image-v2.cdn.app.senecalearning.com/2018-08/3eee1686-33a6-4c4e-9239-49708121f6d0/divers-beach-diving.jpg)

- Tourism surrounding coral reefs have always included scuba divers and snorkelling to see the beautiful colours and fish.
- Coral bleaching has been seen in Australia’s Great Barrier Reef which can impact the tourism industry of these regions and can lead to a spiral of decline.
- Oil spills, though less common, are devastating to coral and marine ecosystems.

### Coastal protection

![Coastal protection](https://image-v2.cdn.app.senecalearning.com/2018-08/888c79a0-25ab-4370-8635-88bf31561311/mangroves.jpeg)

- Mangroves provide significant coastal protection and are found along tropical coasts. They bind together sediment with their extensive root network, protecting the shore from storm surges and preventing erosion.
- 50% of all mangroves have been lost since the 1950s. This is largely because of tourism, as the mangroves can be cleared for tourist-friendly beaches and hotel developments. But this leaves the coasts exposed, as seen in Northern Sri Lanka in the 2004 Boxing Day Tsunami.

## Test yourself on Water

- What does CO2 convert to when there is a high concentration of it absorbed into the ocean?
- What lives in the tissues of corals, providing carbohydrates through photosynthesis?
- Where are increased temperatures likely to cause the most impact?
- What percentage of all mangroves have been lost since the 1950s?

[Practise this topic for free](https://app.senecalearning.com/classroom/course/e863f76a-c037-441e-b405-96c1e8649284/section/83366299-5fa3-43a4-b59a-963e43eb006a/session)

- Previous topic: [8.4.1 Deforestation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-1-deforestation.md)
- Next topic: [8.4.3 Climate Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-3-climate-change.md)

## Geography: Edexcel A Level contents

### 1 Tectonic Processes & Hazards
- 1.1 Tectonic Processes & Hazards
  - [1.1.1 Tectonic Plates](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-1-tectonic-plates.md)
  - [1.1.2 Distribution of Tectonic Hazards](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-2-distribution-of-tectonic-hazards.md)
  - [1.1.3 Theoretical Frameworks](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-3-theoretical-frameworks.md)
  - [1.1.4 Earthquakes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-4-earthquakes.md)
  - [1.1.5 Earthquake Hazards](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-5-earthquake-hazards.md)
  - [1.1.6 Volcanoes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-6-volcanoes.md)
  - [1.1.7 Tsunamis](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-7-tsunamis.md)
  - [1.1.8 End of Topic Test - Tectonic Processes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-8-end-of-topic-test-tectonic-processes.md)
  - [1.1.9 Exam-Style Question - Earthquakes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-1-9-exam-style-question-earthquakes.md)
- 1.2 Natural Disasters
  - [1.2.1 Introduction to Natural Disasters](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-2-1-introduction-to-natural-disasters.md)
  - [1.2.2 Impacts of Hazards](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-2-2-impacts-of-hazards.md)
  - [1.2.3 Comparing Hazards](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-2-3-comparing-hazards.md)
  - [1.2.4 Development & Governance](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-2-4-development-and-governance.md)
- 1.3 Natural Disaster Case Studies
  - [1.3.1 Tohoku Earthquake & Tsunami](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-3-1-tohoku-earthquake-and-tsunami.md)
  - [1.3.2 Gorkha Earthquake](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-3-2-gorkha-earthquake.md)
  - [1.3.3 Mount Merapi Eruption](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-3-3-mount-merapi-eruption.md)
- 1.4 Trends & Patterns
  - [1.4.1 Disaster Trends](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-4-1-disaster-trends.md)
  - [1.4.2 Prediction](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-4-2-prediction.md)
- 1.5 Disaster Modification
  - [1.5.1 Hazard Management](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-5-1-hazard-management.md)
  - [1.5.2 Modifications](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-5-2-modifications.md)
  - [1.5.3 End of Topic Test - Natural Disasters](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-5-3-end-of-topic-test-natural-disasters.md)
  - [1.5.4 Exam-Style Question - Disaster Modification](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/1-5-4-exam-style-question-disaster-modification.md)

### 2 Option 2A: Glaciated Landscapes & Change
- 2.1 Glaciated Landscapes Over Time
  - [2.1.1 Timeline of Glacial Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-1-1-timeline-of-glacial-change.md)
  - [2.1.2 Natural Causes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-1-2-natural-causes.md)
  - [2.1.3 Ice Distributions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-1-3-ice-distributions.md)
- 2.2 Periglacial Landscapes
  - [2.2.1 Periglacial Processes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-2-1-periglacial-processes.md)
  - [2.2.2 Periglacial Landforms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-2-2-periglacial-landforms.md)
- 2.3 Glacial Processes
  - [2.3.1 Mass Balance](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-3-1-mass-balance.md)
  - [2.3.2 Glacial Movement](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-3-2-glacial-movement.md)
- 2.4 Glacial Landforms
  - [2.4.1 Landscapes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-1-landscapes.md)
  - [2.4.2 Erosional Landforms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-2-erosional-landforms.md)
  - [2.4.3 Erosional Landforms 2](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-3-erosional-landforms-2.md)
  - [2.4.4 Erosional Landforms 3](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-4-erosional-landforms-3.md)
  - [2.4.5 Depositional Landforms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-5-depositional-landforms.md)
  - [2.4.6 Fluvioglaciation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-4-6-fluvioglaciation.md)
- 2.5 The Future of Glaciated Landscapes
  - [2.5.1 The Value of Glaciated Landscapes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-5-1-the-value-of-glaciated-landscapes.md)
  - [2.5.2 The Value of Glaciated Landscapes 2](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-5-2-the-value-of-glaciated-landscapes-2.md)
  - [2.5.3 Threats to Glaciated Landscapes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-5-3-threats-to-glaciated-landscapes.md)
  - [2.5.4 Managing the Threats to Glaciated Landscapes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/2-5-4-managing-the-threats-to-glaciated-landscapes.md)

### 3 Option 2B: Coastal Landscapes & Change
- 3.1 Coastal Landscapes
  - [3.1.1 The Wider Coastal Landscape](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-1-1-the-wider-coastal-landscape.md)
  - [3.1.2 Geological Structure](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-1-2-geological-structure.md)
  - [3.1.3 Lithology & Vegetation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-1-3-lithology-and-vegetation.md)
- 3.2 Coastal Erosion & Deposition
  - [3.2.1 Shaping Coastlines](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-2-1-shaping-coastlines.md)
  - [3.2.2 Coastal Formations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-2-2-coastal-formations.md)
  - [3.2.3 Sediment Transportation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-2-3-sediment-transportation.md)
  - [3.2.4 Subaerial Processes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-2-4-subaerial-processes.md)
- 3.3 Coastal Risks
  - [3.3.1 Sea Level Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-3-1-sea-level-change.md)
  - [3.3.2 Coastal Retreat](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-3-2-coastal-retreat.md)
  - [3.3.3 Coastal Flooding](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-3-3-coastal-flooding.md)
- 3.4 Managing Coastlines
  - [3.4.1 Consequences of Coastal Recession](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-4-1-consequences-of-coastal-recession.md)
  - [3.4.2 Engineering Management Approaches](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-4-2-engineering-management-approaches.md)
  - [3.4.3 Governance Approaches](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/3-4-3-governance-approaches.md)

### 4 Globalisation
- 4.1 Globalisation
  - [4.1.1 Intro to Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-1-intro-to-globalisation.md)
  - [4.1.2 Development of Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-2-development-of-globalisation.md)
  - [4.1.3 Economic Policy & Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-3-economic-policy-and-globalisation.md)
  - [4.1.4 Government Policy & Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-4-government-policy-and-globalisation.md)
  - [4.1.5 International Organisations & Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-5-international-organisations-and-globalisation.md)
  - [4.1.6 Measuring Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-6-measuring-globalisation.md)
  - [4.1.7 TNCs & Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-7-tncs-and-globalisation.md)
  - [4.1.8 TNCs - Aramco & Anglo-Iranian Oil](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-1-8-tncs-aramco-and-anglo-iranian-oil.md)
- 4.2 Negatives of Globalisation
  - [4.2.1 'Switched Off' Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-2-1-switched-off-places.md)
- 4.3 Global Shift
  - [4.3.1 Global Shift for Developing Nations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-3-1-global-shift-for-developing-nations.md)
  - [4.3.2 Global Shift for Developing Nations 2](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-3-2-global-shift-for-developing-nations-2.md)
  - [4.3.3 Global Shift for Developed Nations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-3-3-global-shift-for-developed-nations.md)
  - [4.3.4 End of Topic Test - Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-3-4-end-of-topic-test-globalisation.md)
- 4.4 Migration
  - [4.4.1 Megacities](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-4-1-megacities.md)
  - [4.4.2 International Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-4-2-international-migration.md)
  - [4.4.3 Country Interdependence](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-4-3-country-interdependence.md)
- 4.5 Culture
  - [4.5.1 Global Culture](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-5-1-global-culture.md)
  - [4.5.2 Cultural Erosion](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-5-2-cultural-erosion.md)
- 4.6 Measuring Development
  - [4.6.1 Measuring Development](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-6-1-measuring-development.md)
- 4.7 Responses to Globalisation
  - [4.7.1 Tensions Caused by Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-7-1-tensions-caused-by-globalisation.md)
  - [4.7.2 Government Control of Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-7-2-government-control-of-globalisation.md)
  - [4.7.3 Ethical Responses to Globalisation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-7-3-ethical-responses-to-globalisation.md)
  - [4.7.4 End of Topic Test - Migration, Culture, & Response](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/4-7-4-end-of-topic-test-migration-culture-and-response.md)

### 5 Option 4A: Regenerating Places
- 5.1 Types of Economies
  - [5.1.1 Economic Activity](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-1-1-economic-activity.md)
  - [5.1.2 Employment](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-1-2-employment.md)
  - [5.1.3 Economic Activity - Health & Life](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-1-3-economic-activity-health-and-life.md)
  - [5.1.4 Economic Activity - Education & Inequality](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-1-4-economic-activity-education-and-inequality.md)
- 5.2 Function of Places
  - [5.2.1 Characteristics of Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-1-characteristics-of-places.md)
  - [5.2.2 Changes in Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-2-changes-in-places.md)
  - [5.2.3 International Influences on Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-3-international-influences-on-places.md)
  - [5.2.4 Historic Influences on Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-4-historic-influences-on-places.md)
  - [5.2.5 The Perception of Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-5-the-perception-of-places.md)
  - [5.2.6 Lived Experience & Attachment](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-2-6-lived-experience-and-attachment.md)
- 5.3 Regeneration
  - [5.3.1 Migration & Capital](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-1-migration-and-capital.md)
  - [5.3.2 Success & Regeneration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-2-success-and-regeneration.md)
  - [5.3.3 Tensions & Conflict in Communities](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-3-tensions-and-conflict-in-communities.md)
  - [5.3.4 Regeneration in the UK](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-4-regeneration-in-the-uk.md)
  - [5.3.5 Local Government Policies](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-5-local-government-policies.md)
  - [5.3.6 Regeneration Strategies](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-6-regeneration-strategies.md)
  - [5.3.7 Measuring Regeneration Success](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-3-7-measuring-regeneration-success.md)
- 5.4 Regeneration Case Studies
  - [5.4.1 Stratford](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-4-1-stratford.md)
  - [5.4.2 Salford Quays](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-4-2-salford-quays.md)
  - [5.4.3 Croyde](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/5-4-3-croyde.md)

### 6 Option 4B: Diverse Places
- 6.1 Population Structure
  - [6.1.1 The UK](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-1-1-the-uk.md)
  - [6.1.2 Population Characteristics](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-1-2-population-characteristics.md)
  - [6.1.3 Government & Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-1-3-government-and-change.md)
- 6.2 Past & Present Connections
  - [6.2.1 International Influence on Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-2-1-international-influence-on-places.md)
  - [6.2.2 Historic Influences on Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-2-2-historic-influences-on-places.md)
  - [6.2.3 The Perception of Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-2-3-the-perception-of-places.md)
  - [6.2.4 Image & Identity](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-2-4-image-and-identity.md)
- 6.3 Urban & Rural Spaces
  - [6.3.1 Perceptions of Urban Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-3-1-perceptions-of-urban-places.md)
  - [6.3.2 Perceptions of Rural Places](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-3-2-perceptions-of-rural-places.md)
  - [6.3.3 Evaluating Living Space](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-3-3-evaluating-living-space.md)
- 6.4 Diversity
  - [6.4.1 UK Migrations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-4-1-uk-migrations.md)
  - [6.4.2 Challenges](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-4-2-challenges.md)
  - [6.4.3 Tensions & Conflict](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-4-3-tensions-and-conflict.md)
  - [6.4.4 Wider Outcomes of Tensions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-4-4-wider-outcomes-of-tensions.md)
  - [6.4.5 Managing Tensions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-4-5-managing-tensions.md)
- 6.5 Urban & Rural Case Studies
  - [6.5.1 Stakeholders](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-5-1-stakeholders.md)
- 6.6 Case Study - Tower Hamlets
  - [6.6.1 Background](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-6-1-background.md)
  - [6.6.2 Characteristics](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-6-2-characteristics.md)
  - [6.6.3 Issues](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-6-3-issues.md)
- 6.7 Case Study - Sturton-le-Steeple
  - [6.7.1 Background](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-7-1-background.md)
  - [6.7.2 Characteristics](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-7-2-characteristics.md)
  - [6.7.3 Issues](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/6-7-3-issues.md)

### 7 The Water Cycle & Water Insecurity (A2 only)
- 7.1 Hydrological Processes Global to Local
  - [7.1.1 Global Hydrological Cycle](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-1-1-global-hydrological-cycle.md)
  - [7.1.2 Drainage Basin Hydrological Cycle](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-1-2-drainage-basin-hydrological-cycle.md)
  - [7.1.3 Water Budgets](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-1-3-water-budgets.md)
  - [7.1.4 River Regimes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-1-4-river-regimes.md)
  - [7.1.5 Storm Hydrographs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-1-5-storm-hydrographs.md)
- 7.2 Influences on the Water Cycle
  - [7.2.1 Causes of Drought](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-1-causes-of-drought.md)
  - [7.2.2 Impacts of Drought](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-2-impacts-of-drought.md)
  - [7.2.3 Causes of Flooding](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-3-causes-of-flooding.md)
  - [7.2.4 Impacts of Flooding](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-4-impacts-of-flooding.md)
  - [7.2.5 Climate Change & The Water Cycle](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-5-climate-change-and-the-water-cycle.md)
  - [7.2.6 Impacts of Climate Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-6-impacts-of-climate-change.md)
  - [7.2.7 End of Topic Test - The Water Cycle](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-2-7-end-of-topic-test-the-water-cycle.md)
- 7.3 Water Insecurity
  - [7.3.1 Water Stress](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-3-1-water-stress.md)
  - [7.3.2 Causes of Water Insecurity](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-3-2-causes-of-water-insecurity.md)
  - [7.3.3 Water Insecurity Risk](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-3-3-water-insecurity-risk.md)
  - [7.3.4 Conflict Over Water](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-3-4-conflict-over-water.md)
- 7.4 Water Supply Management
  - [7.4.1 Hard Engineering Schemes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-4-1-hard-engineering-schemes.md)
  - [7.4.2 Sustainable Management](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-4-2-sustainable-management.md)
  - [7.4.3 Water Treaties & Framework](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-4-3-water-treaties-and-framework.md)
  - [7.4.4 End of Topic Test - Water Insecurity & Management](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/7-4-4-end-of-topic-test-water-insecurity-and-management.md)

### 8 The Carbon Cycle & Energy Security (A2 only)
- 8.1 The Carbon Cycle
  - [8.1.1 Carbon Stores](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-1-1-carbon-stores.md)
  - [8.1.2 Carbon Stores 2](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-1-2-carbon-stores-2.md)
  - [8.1.3 Biological Carbon](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-1-3-biological-carbon.md)
  - [8.1.4 Atmospheric Carbon](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-1-4-atmospheric-carbon.md)
  - [8.1.5 Burning Fossil Fuels](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-1-5-burning-fossil-fuels.md)
- 8.2 Energy Consumption
  - [8.2.1 Consumption](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-1-consumption.md)
  - [8.2.2 Access to Energy](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-2-access-to-energy.md)
  - [8.2.3 Energy Players](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-3-energy-players.md)
  - [8.2.4 Supply & Demand](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-4-supply-and-demand.md)
  - [8.2.5 Pathways](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-5-pathways.md)
  - [8.2.6 End of Topic Test - Carbon & Consumption](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-2-6-end-of-topic-test-carbon-and-consumption.md)
- 8.3 Alternative Energy
  - [8.3.1 Unconventional Fuels](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-3-1-unconventional-fuels.md)
  - [8.3.2 Non-Fossil Fuels](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-3-2-non-fossil-fuels.md)
  - [8.3.3 Non-Fossil Fuels 2](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-3-3-non-fossil-fuels-2.md)
- 8.4 Growing Demand for Resources
  - [8.4.1 Deforestation](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-1-deforestation.md)
  - [8.4.2 Water](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-2-water.md)
  - [8.4.3 Climate Change](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-4-3-climate-change.md)
- 8.5 The Future
  - [8.5.1 Future Uncertainty](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-5-1-future-uncertainty.md)
  - [8.5.2 Adaptation Strategies](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-5-2-adaptation-strategies.md)
  - [8.5.3 Mitigation Strategies](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/8-5-3-mitigation-strategies.md)

### 9 Superpowers (A2 only)
- 9.1 Superpowers
  - [9.1.1 Introduction to Superpowers](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-1-1-introduction-to-superpowers.md)
  - [9.1.2 Superpowers - Economic Power & Size](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-1-2-superpowers-economic-power-and-size.md)
  - [9.1.3 Superpowers - Political & Military Power](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-1-3-superpowers-political-and-military-power.md)
  - [9.1.4 Superpowers - Culture, Demography & Resources](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-1-4-superpowers-culture-demography-and-resources.md)
  - [9.1.5 Geo-Strategic Location](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-1-5-geo-strategic-location.md)
- 9.2 Hard & Soft Power
  - [9.2.1 Hard & Soft Power](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-1-hard-and-soft-power.md)
  - [9.2.2 Emerging Powers - China Rivalry](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-2-emerging-powers-china-rivalry.md)
  - [9.2.3 Emerging Powers - Chinese Sources of Power](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-3-emerging-powers-chinese-sources-of-power.md)
  - [9.2.4 Emerging Powers - Brazil](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-4-emerging-powers-brazil.md)
  - [9.2.5 Emerging Powers - Russia](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-5-emerging-powers-russia.md)
  - [9.2.6 Emerging Powers - India](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-6-emerging-powers-india.md)
  - [9.2.7 Theories of Development](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-7-theories-of-development.md)
  - [9.2.8 Power Case Studies: Chinese One Belt One Road](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-8-power-case-studies-chinese-one-belt-one-road.md)
  - [9.2.9 Power Case Studies: Pakistan Nuclear Arms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-9-power-case-studies-pakistan-nuclear-arms.md)
  - [9.2.10 Power Case Studies: OPEC](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-2-10-power-case-studies-opec.md)
- 9.3 IGOs, TNCs & Alliances
  - [9.3.1 Superpowers & IGOs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-3-1-superpowers-and-igos.md)
  - [9.3.2 Superpowers & TNCs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-3-2-superpowers-and-tncs.md)
  - [9.3.3 Superpowers & Global Action](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-3-3-superpowers-and-global-action.md)
  - [9.3.4 Superpowers & Alliances](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-3-4-superpowers-and-alliances.md)
  - [9.3.5 Superpowers & the Environment](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-3-5-superpowers-and-the-environment.md)
- 9.4 Changing Global Influence
  - [9.4.1 Recent Tensions between Powers](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-4-1-recent-tensions-between-powers.md)
  - [9.4.2 China in Africa & Asia](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-4-2-china-in-africa-and-asia.md)
  - [9.4.3 Tensions in the Middle East](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-4-3-tensions-in-the-middle-east.md)
  - [9.4.4 Economic Problems for Superpowers](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-4-4-economic-problems-for-superpowers.md)
  - [9.4.5 Future Pattern of Power](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/9-4-5-future-pattern-of-power.md)

### 10 Option 8A: Health & Human Rights (A2 only)
- 10.1 Human Development
  - [10.1.1 Measuring Development](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-1-1-measuring-development.md)
  - [10.1.2 Factors Improving Development](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-1-2-factors-improving-development.md)
  - [10.1.3 Variations in Health](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-1-3-variations-in-health.md)
- 10.2 Role of Governments & IGOs
  - [10.2.1 Targets & Attitudes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-2-1-targets-and-attitudes.md)
  - [10.2.2 Financial IGOs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-2-2-financial-igos.md)
  - [10.2.3 The United Nations (UN)](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-2-3-the-united-nations-un.md)
  - [10.2.4 The UN's MDGs & SDGs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-2-4-the-uns-mdgs-and-sdgs.md)
- 10.3 Human Rights
  - [10.3.1 Human Rights](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-3-1-human-rights.md)
  - [10.3.2 Differences Between Countries](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-3-2-differences-between-countries.md)
  - [10.3.3 Transitions to Democracy](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-3-3-transitions-to-democracy.md)
  - [10.3.4 Differences Within Countries](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-3-4-differences-within-countries.md)
  - [10.3.5 The Demand for Equality](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-3-5-the-demand-for-equality.md)
- 10.4 Interventions
  - [10.4.1 Geopolitical Interventions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-4-1-geopolitical-interventions.md)
  - [10.4.2 International Intervention Players](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-4-2-international-intervention-players.md)
  - [10.4.3 Evaluating Geopolitical Intervention](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-4-3-evaluating-geopolitical-intervention.md)
  - [10.4.4 Military Interventions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-4-4-military-interventions.md)
  - [10.4.5 Evaluating Military Interventions](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-4-5-evaluating-military-interventions.md)
- 10.5 Development Aid
  - [10.5.1 Forms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-1-forms.md)
  - [10.5.2 Successes](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-2-successes.md)
  - [10.5.3 Criticisms](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-3-criticisms.md)
  - [10.5.4 Development Aid & the Environment](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-4-development-aid-and-the-environment.md)
  - [10.5.5 Evaluating Development Aid](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-5-evaluating-development-aid.md)
  - [10.5.6 Economic Inequalities](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/10-5-6-economic-inequalities.md)

### 11 Option 8B: Migration & Identity (A2 only)
- 11.1 Globalisation & Migration
  - [11.1.1 Intro to Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-1-1-intro-to-migration.md)
  - [11.1.2 Trends in Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-1-2-trends-in-migration.md)
  - [11.1.3 Common Migration Patterns](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-1-3-common-migration-patterns.md)
  - [11.1.4 Causes of Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-1-4-causes-of-migration.md)
  - [11.1.5 Restrictions on Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-1-5-restrictions-on-migration.md)
- 11.2 Consequences of Migration
  - [11.2.1 Intro to Culture](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-2-1-intro-to-culture.md)
  - [11.2.2 Social & Demographic Tensions of Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-2-2-social-and-demographic-tensions-of-migration.md)
  - [11.2.3 Political & Economic Tensions of Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-2-3-political-and-economic-tensions-of-migration.md)
- 11.3 Nation States
  - [11.3.1 Intro to Nation States](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-3-1-intro-to-nation-states.md)
  - [11.3.2 Borders](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-3-2-borders.md)
  - [11.3.3 Nationalism](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-3-3-nationalism.md)
- 11.4 Responses to Global Migration
  - [11.4.1 Responses to Global Migration](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-4-1-responses-to-global-migration.md)
  - [11.4.2 Global Organisations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-4-2-global-organisations.md)
  - [11.4.3 IGOs and World Trade](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-4-3-igos-and-world-trade.md)
  - [11.4.4 Financial IGOs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-4-4-financial-igos.md)
  - [11.4.5 Environmental IGOs](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-4-5-environmental-igos.md)
- 11.5 Sovereignty & Identity
  - [11.5.1 Sovereignty & Nationalism](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-5-1-sovereignty-and-nationalism.md)
  - [11.5.2 Complex Identities](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-5-2-complex-identities.md)
  - [11.5.3 Challenges to National Identities](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-5-3-challenges-to-national-identities.md)
  - [11.5.4 Tensions within Nations](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-5-4-tensions-within-nations.md)
  - [11.5.5 Failed States](https://senecalearning.com/en-gb/revision-notes/a-level/geography/edexcel/11-5-5-failed-states.md)