Edexcel GCSE Geography A (1GA0) — The Human Environment
Have you ever wondered how the government knows exactly who lives where and what services they need? Every ten years, the UK government conducts a Census to record the demographic characteristics of the population, such as age, ethnicity, and employment.
Census data reveals distinct spatial patterns in population structure (the makeup or composition of a population) across the UK. When examining age structure, urban areas like London have a younger population (median age ) because they attract working-age people, whereas coastal or declining areas like Sunderland have an ageing population (median age ).
Diversity is also highly concentrated in urban cores. In the 2021 Census, 41% of London's population was born outside the UK, with boroughs like Brent having a non-UK-born population as high as 56%. This contrasts with the national average of 16.8% for England and Wales.
Socio-economic status varies significantly between demographic groups and locations. The Index of Multiple Deprivation (IMD) is a metric used to rank areas based on seven domains, including income, employment, and health. The 2021 Census highlighted employment disparities; for example, while the White ethnic group makes up 81.7% of the total population, they constitute 72.7% of the long-term unemployed, whereas Asian groups (9.3% of the population) constitute 15.8% of the same category.
Geographers use formulas to analyse Census data and understand the burden on the working population. The Dependency Ratio compares the non-working population to the working-age population:
To calculate how much a population has grown or shrunk between two Census years, we use the percentage change formula:
Calculate the percentage population growth for London between the 2011 Census (8.2 million) and the 2021 Census (8.8 million).
Step 1: Identify the values.
Step 2: Substitute the values into the equation.
Step 3: Calculate the final answer.
A city's population acts like a giant set of weighing scales, constantly balancing arrivals and departures. The UK population grew by 20% (10 million people) over the last 50 years, driven by two distinct mechanisms.
The first driver is Natural Change, which is the difference between birth rates and death rates. If births exceed deaths, a Natural Increase occurs. If deaths exceed births (common in ageing coastal populations), a Natural Decrease occurs.
The second driver is Net Migration, which is the number of immigrants minus emigrants. Between 1991 and 2018, 56% of UK growth was directly due to net migration.
These two drivers are closely linked by the "Migration-Natural Increase Loop". International migrants are typically young adults (aged 21–35). This creates a double effect: they boost the population directly via migration, and indirectly by increasing the birth rate. The Total Fertility Rate for non-UK-born women is 2.03, compared to just 1.54 for UK-born women.
Conversely, some areas experience population decline. Sunderland's population fell by 0.5% between 2011 and 2021, driven by a 6.1% decrease in the 15–64 age group. This outward migration was caused by industrial decline. Many older cities also lose residents to Counter-urbanisation, where people move from urban cores to suburban or rural areas in search of a better quality of life.
Calculate the Natural Increase Rate as a percentage for a city with a birth rate of 13 per 1,000 and a death rate of 9 per 1,000.
Step 1: State the formula.
Step 2: Substitute the values.
Step 3: Calculate the final answer.
If you walked through London or Manchester a century ago, the skyline would have been choked with factory smoke. Today, the UK's secondary (manufacturing) sector has shed 6 million jobs since the mid-1960s, a process known as Deindustrialisation.
This process is part of a wider Economic Restructuring — a major shift in the national economy from an industrial base (secondary sector) to a service and knowledge-based economy (tertiary and quaternary sectors). This restructuring is driven by three main causal mechanisms:
When a major factory shuts its doors, the shockwaves are felt far beyond the factory gates. The closure of a primary employer triggers a Spiral of Decline (or Negative Multiplier Effect). Job losses lead to reduced local spending, causing local shops and services to close, which in turn leads to further unemployment and outward migration.
Deindustrialisation has profound and varied impacts on urban environments:
Geographers measure these economic disparities using Gross Value Added (GVA). The GVA in Middlesbrough is just £17,000 per person, compared to £34,000 in southern cities like Reading, highlighting the ongoing North-South divide caused by historical industrial decline.
Students often confuse 'natural increase' with 'population growth'. Remember that natural increase ONLY accounts for births minus deaths, whereas total population growth must also include net migration.
When an exam question uses the command word 'Analyze' alongside Census data, you must extract and quote specific numerical evidence from the provided tables or text (e.g., 'London's population grew by 7.3%').
For 6- or 8-mark questions asking you to 'Explain the impacts of deindustrialisation', examiners expect you to structure your answer using clear categories: economic, social, physical, and environmental.
Always provide a specific causal mechanism when explaining deindustrialisation — for example, explicitly link containerisation (globalisation) to the inability of ships to reach the London Docks.
Census
A government survey conducted every 10 years to record population characteristics such as age, ethnicity, and employment.
Population Structure
The composition of a given population, typically categorised by factors such as age, gender, and ethnicity.
Index of Multiple Deprivation (IMD)
A metric used to rank areas based on seven domains of deprivation, including income, employment, health, and education.
Dependency Ratio
A measure comparing the proportion of people typically not in the labour force (ages 0-14 and 65+) to those of working age (15-64).
Natural Change
The difference between the number of live births and the number of deaths in a population over a given period.
Natural Increase
When the birth rate is higher than the death rate, leading to population growth without factoring in migration.
Natural Decrease
When the death rate exceeds the birth rate, causing a population to shrink naturally, often found in ageing communities.
Net Migration
The difference between the number of immigrants entering a country and the number of emigrants leaving it.
Counter-urbanisation
The movement of people out of urban cores into rural-urban fringes or suburban areas, usually in search of a better quality of life.
Deindustrialisation
The long-term decline of a country's traditional manufacturing base and secondary sector employment.
Economic Restructuring
The transition of an economy from an industrial base (secondary sector) to a service and knowledge-based economy (tertiary and quaternary sectors).
Mechanisation
The process of replacing human labour with machinery and technology, which reduces the need for large industrial workforces.
Globalisation
The increasing interconnectedness of the world, which allows manufacturing to be outsourced to countries with lower labour costs.
Spiral of Decline
A continuous cycle where an initial economic shock (like a factory closure) leads to job losses, less local spending, service closures, and outward migration.
Negative Multiplier Effect
A process where the loss of a major employer leads to the closure of local suppliers and shops, resulting in further compounding job losses.
Urban Dereliction
The state of buildings and land in urban areas being abandoned and falling into severe disrepair.
Brownfield Site
Previously developed land that is now derelict and potentially contaminated, often left behind by closed industries.
Gross Value Added (GVA)
A measure of the value of goods and services produced in an area, used to compare economic success between different cities or regions.
Put your knowledge into practice — try past paper questions for Geography A
Census
A government survey conducted every 10 years to record population characteristics such as age, ethnicity, and employment.
Population Structure
The composition of a given population, typically categorised by factors such as age, gender, and ethnicity.
Index of Multiple Deprivation (IMD)
A metric used to rank areas based on seven domains of deprivation, including income, employment, health, and education.
Dependency Ratio
A measure comparing the proportion of people typically not in the labour force (ages 0-14 and 65+) to those of working age (15-64).
Natural Change
The difference between the number of live births and the number of deaths in a population over a given period.
Natural Increase
When the birth rate is higher than the death rate, leading to population growth without factoring in migration.
Natural Decrease
When the death rate exceeds the birth rate, causing a population to shrink naturally, often found in ageing communities.
Net Migration
The difference between the number of immigrants entering a country and the number of emigrants leaving it.
Counter-urbanisation
The movement of people out of urban cores into rural-urban fringes or suburban areas, usually in search of a better quality of life.
Deindustrialisation
The long-term decline of a country's traditional manufacturing base and secondary sector employment.
Economic Restructuring
The transition of an economy from an industrial base (secondary sector) to a service and knowledge-based economy (tertiary and quaternary sectors).
Mechanisation
The process of replacing human labour with machinery and technology, which reduces the need for large industrial workforces.
Globalisation
The increasing interconnectedness of the world, which allows manufacturing to be outsourced to countries with lower labour costs.
Spiral of Decline
A continuous cycle where an initial economic shock (like a factory closure) leads to job losses, less local spending, service closures, and outward migration.
Negative Multiplier Effect
A process where the loss of a major employer leads to the closure of local suppliers and shops, resulting in further compounding job losses.
Urban Dereliction
The state of buildings and land in urban areas being abandoned and falling into severe disrepair.
Brownfield Site
Previously developed land that is now derelict and potentially contaminated, often left behind by closed industries.
Gross Value Added (GVA)
A measure of the value of goods and services produced in an area, used to compare economic success between different cities or regions.
