6.2.5

Population Pyramids

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Population Pyramids

Population pyramids show the number of people in each age band (cohort) and organise them by gender.

Concave pyramid

Concave pyramid

  • A pyramid with concave sides.
  • E.g. Remote tribes and some of the poorest nations.
  • These countries are similar to countries in Stage 1 of the Demographic Transition Model:
    • Very high birth rate.
    • The highest number of people are in the 0-4 years cohort.
    • The numbers then drop off quickly and the cohorts get smaller as the ages increase.
    • This is because of the high death rate.
    • There are very low numbers as people get to retirement age because most people have died by then.
Straight-sided pyramid

Straight-sided pyramid

  • Examples include most low-income countries, e.g. Madagascar and Afghanistan.
  • These countries are similar to countries in Stage 2 of the Demographic Transition Model:
    • High birth rate.
    • The highest number of people are in the 0-4 years cohort.
    • The numbers drop off as the age increases but at a slower rate than concave pyramids.
    • There are very low numbers of people over 60 years old.
    • The population is expanding.
Arch-shaped pyramid

Arch-shaped pyramid

  • Examples include high-income countries like the UK and USA.
  • These countries are similar to countries in Stage 4 of the Demographic Transition Model:
    • Low birth rate and low death rate.
    • The number of people in the cohorts from 0-60 years are even.
    • The number of people over 60 years starts to decrease slightly.
Cone-shaped pyramid

Cone-shaped pyramid

  • Examples include high-income countries like Japan and Germany.
  • These countries are similar to countries in Stage 5 of the Demographic Transition Model:
    • Low and further decreasing birth rate and low death rate.
    • There are fewer young dependents than old dependents.
    • These countries have an ageing population.
    • A lot of the population is over 60 years old.
    • The population size is getting smaller.
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1

Paper 1 - Changing River Environnments

1.1

Characteristics of Rivers

1.1.1The Long Profile1.1.2Characteristics of Rivers
1.2

River Landforms

1.2.1Waterfalls & Gorges1.2.2Meanders1.2.3Oxbow Lakes1.2.4Levees1.2.5Floodplains1.2.6Deltas1.2.7Interlocking Spurs
1.3

Rivers: Opportunities & Hazards

1.3.1River Pollution1.3.2River Pollution in the River Thames
1.4

The Bradshaw Model

1.4.1The Bradshaw Model
1.5

The Drainage Basin & the Water Cycle

1.5.1The Drainage Basin & the Water Cycle
1.6

Processes Operating in a Drainage Basin

1.6.1Hydrological Cycle in a Drainage Basin1.6.2Processes in a Drainage Basin
1.7

Processes Operating in a River

1.7.1Erosion1.7.2Transportation1.7.3Deposition1.7.4Diagnostic Misconceptions - Upper Course1.7.5Diagnostic Misconceptions - Deposition
2

Paper 1 - Changing Coastal Environments

2.1

Physical Processes that Shape the Coast

2.1.1Processes of Erosion2.1.2Corrosion & Corrasion2.1.3Transportation2.1.4Deposition2.1.5Longshore Drift2.1.6Types of Waves2.1.7Case Study: The Holderness Coast (UK)2.1.8Case Study: The Holderness Coast - Management2.1.9Case Study: The Holderness Coast - Defences2.1.10Diagnostic Misconceptions - Swash & Backwash
2.2

Landforms

2.2.1Headlands & Bays2.2.2Beaches, Stumps, & Cliffs2.2.3Wave-cut Platforms2.2.4Caves, Arches, & Stacks2.2.5Spits, Bars, & Sand Dunes2.2.6Discordant & Concordant Coastlines
2.3

Opportunities & Hazards

2.3.1Opportunities & Hazards2.3.2Managing Flooding - Hard Engineering2.3.3Coastal Management - Hard Engineering2.3.4Coastal Management - More Hard Engineering2.3.5Coastal Management - Soft Engineering2.3.6End of Topic Test - Rivers2.3.7End of Topic Test -Coasts
2.4

Tropical Storms

2.4.1Tropical Storms2.4.2Structure of Tropical Storms2.4.3Causes of Tropical Storms2.4.4Effects of Tropical Storms2.4.5Hazards of Tropical Storms2.4.6Case Study: Hurricane Katrina - Effects2.4.7Case Study: Hurricane Katrina - Responses2.4.8Case Study: Cyclone Nargis - Responses2.4.9Case Study: Cyclone Nargis2.4.10Mathematical Skills: Weather Hazards2.4.11Diagnostic Misconceptions - Rainfall
2.5

Protection & Management

2.5.1Coral Reefs2.5.2Types of Reefs2.5.3Importance of Coral Reefs2.5.4Mangrove Swamps2.5.5Importance of Mangroves
3

Paper 1 - Changing Ecosystems

3.1

Antarctic

3.1.1Features of the Antartic Ecosystem3.1.2Factors Influencing the Antarctic3.1.3Abiotic–Biotic Factors & Adaptations
3.2

Threats to the Antarctic

3.2.1Antarctic: Threats & Impacts3.2.2Antarctic: Evaluation of Strategies
3.3

Tropical Rainforest

3.3.1Global Distribution & Characteristics3.3.2Tropical Rainforest: Structure3.3.3Tropical Rainforest: Interrelationships
3.4

Tropical Rainforest: Threats

3.4.1ThreatsThreats & Impacts3.4.2Evaluation of Strategies3.4.3Mathematical Skills: Deforestation3.4.4Rainforest Case Study
4

Paper 1 - Tectonic Hazards

4.1

The Structure of the Earth

4.1.1Structure of the Earth: Characteristics4.1.2Tectonic Plates4.1.3Plate Margins4.1.4Plate Boundaries4.1.5Earthquakes at Plate Margins
4.2

The Processes of Earthquakes & Volcanoes

4.2.1Earthquakes: Processes & Characteristics4.2.2Earthquake Hazards4.2.3Types of Volcano4.2.4Classification & Features4.2.5Volcanic Hazards4.2.6Diagnostic Misconceptions - Lava4.2.7Diagnostic Misconceptions - Location of Volcanoes4.2.8Diagnostic Misconceptions - Focus vs Epicentre4.2.9Diagnostic Misconceptions - Sliding Plates
4.3

The Impacts of Tectonic Hazards

4.3.1Why do People Live Near Volcanoes?4.3.2Primary Effects of Volcanoes4.3.3Secondary Effects of Volcanoes4.3.4Measuring Earthquakes
4.4

Managing the Impacts of Tectonic Hazards

4.4.1Managing Impacts of Tectonic Hazards - Monitoring4.4.2Managing Impacts of Tectonic Hazards - Planning4.4.3Case Study: Agung4.4.4Case Study: Christchurch4.4.5Mathematic Skills: Tectonic Hazards
5

Paper 1 - Climate Change

5.1

Natural & Human Causes of Climate Change

5.1.1Climate Change: Evidence5.1.2Climate Change: Factors5.1.3Climate Change: Human Influence5.1.4Diagnostic Misconceptions - Greenhouse Effect5.1.5Diagnostic Misconceptions - 1°C Change in Temp.
5.2

Impacts of Climate Change

5.2.1Impact on the Environment5.2.2Impact on People5.2.3Diagnostic Misconceptions - Species Adaptation
5.3

Responses to Climate Change

5.3.1Climate Change: Strategies5.3.2Evaluation of Mitigation5.3.3Climate Change: Case Study
6

Paper 2 - Changing Populations

6.1

Populations Grow & Decline

6.1.1Reasons for Growth & Decline6.1.2Patterns & Trends6.1.3Evaluation of Impacts6.1.4Demographic Transition Model (DTM)6.1.5Stages of the Demographic Transition Model6.1.6Diagnostic Misconceptions - Declining Birth Rate
6.2

Population Structures Over Time

6.2.1Factors Influencing Birth Rates6.2.2Factors Influencing Death Rates6.2.3Population Policies6.2.4Population Structure6.2.5Population Pyramids6.2.6Case Study: UK's Ageing Population - Causes6.2.7Case Study: UK's Ageing Population - Effects6.2.8Case Study: UK's Ageing Population - Responses
6.3

Causes & Impacts of International Migration

6.3.1Migration6.3.2Impacts of Migration6.3.3Types of Migrant & Causes6.3.4Evaluation of Strategies6.3.5Case Study: Afghanistan to Pakistan6.3.6Case Study: Mexico to the USA6.3.7End of Topic Test - Populations
7

Paper 2 - Changing Towns & Cities

7.1

Where People Live

7.1.1Variations in Global Population
7.2

Opportunities & Challenges of Urbanisation

7.2.1Opportunities & Challenges7.2.2Impact7.2.3Diagnostic Misconceptions - Inequality7.2.4Diagnostic Misconceptions - Urbanisation7.2.5Diagnostic Misconceptions - Megacities
7.3

Management of Urban Growth

7.3.1Evaluation of Strategies7.3.2Case Study: Notting Hill & Leicester7.3.3Mathematical Skills: Urban Issues7.3.4End of Topic Test - Urbanisation
8

Paper 2 - Development

8.1

Measuring Development

8.1.1Social & Economic Indicators8.1.2Comparing Countries8.1.3Development: Environmental Factors8.1.4Development: Historical Factors8.1.5Development: Political Causes8.1.6Development: Social Causes8.1.7Development: Economic Causes
8.2

Uneven Development

8.2.1Reasons for Uneven Development8.2.2Uneven Development: Patterns8.2.3Measures of Inequality Within Countries8.2.4Case Study: Inequality in China
8.3

Sustainable Development

8.3.1Definition & Techniques8.3.2Case Study: Bangladesh
9

Paper 2 - Changing Economies

9.1

Changing Employment Structures

9.1.1Different Industries9.1.2Changing Employment Structure9.1.3Industrial Location & Distribution
9.2

Globalisation

9.2.1Globalisation Definition & Features9.2.2Globalisation - Transport9.2.3Globalisation - Communication & Banking9.2.4Transnational Corporations (TNCs)9.2.5Case Study: SEZs in China9.2.6Case Study: SEZs in HSBC
9.3

Tourism

9.3.1Factors Leading to the Growth of Tourism9.3.2The Butler Model9.3.3Benefits of Tourism - Economic9.3.4Benefits of Tourism - Social, Cultural & Env.9.3.5Problems with Tourism - Economic9.3.6Problems of Tourism - Social, Cultural & Env.9.3.7Managing Tourism - Sustainability & Ecotourism9.3.8Managing Tourism - Quotas & Tourism Hubs9.3.9Case Study: Blackpool (UK)9.3.10Mathematical Skills: Changing Economic World
10

Paper 2 - Resource Provision

10.1

Food

10.1.1Farming Types10.1.2Human Inputs10.1.3Physical Inputs10.1.4Green Revolution10.1.5Diagnostic Misconceptions - Food
10.2

Patterns of Food Supply & Demand

10.2.1Calorie Intake10.2.2Reasons for Changing Global Supply10.2.3Strategies to Increase Food Supply10.2.4Reasons & Impacts
10.3

Challenges of Food Supply

10.3.1Human Factors10.3.2Natural Factors10.3.3Impacts of Food Insecurity10.3.4Increasing Farm Output10.3.5Food Aid10.3.6Desertification10.3.7Reducing the Risk of Desertification10.3.8Soil Erosion10.3.9Low Impact Farming10.3.10Mathematical Skills: Food
10.4

Energy

10.4.1Types of Energy: Renewable & Non-Renewable10.4.2Non-Renewable: Fuelwood10.4.3Non-Renewable: Nuclear10.4.4Non-Renewable: Fossil Fuels10.4.5Renewable: Wind & Solar10.4.6Renewable: Wave & Tidal10.4.7Renewable: Biofuel10.4.8Renewable: HEP & Geothermal
10.5

Patterns of Energy Supply & Demand

10.5.1Reasons for Increasing Energy Consumption10.5.2Energy Security10.5.3Variations in Energy Use
10.6

Impacts of Energy Production

10.6.1Strategies to Increase Energy Supply10.6.2Evaluation of the Strategies10.6.3Case Study: Iceland10.6.4Case Study: China10.6.5Mathematical Skills: Energy10.6.6End of Topic Test - Energy

Practice questions on Population Pyramids

Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.

  1. 1
    What stage of the demographic transition model are countries that have concave population pyramids similar to?Multiple choice
  2. 2
    Countries with straight-sided population pyramids:Fill in the list
  3. 3
    Population characteristics of countries with cone-shaped pyramids:True / false
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Population Structure

Case Study: UK's Ageing Population - Causes