Edexcel GCSE Geography A (1GA0) — The Physical Environment
When you look out of a train window at the UK countryside, it might look entirely natural. However, almost every inch of the view is a "human landscape," carefully carved over thousands of years by farming, tree planting, and building.
To analyse how these landscapes formed, geographers look for the causal links. You must connect the cause (why humans needed the land), the action (what they did to it), and the final landscape effect (how it looks and functions today).
Agriculture is the single largest driver of land-use change, covering approximately 70% of the UK. The landscape drastically differs depending on which side of the "Tees-Exe line" you look at.
Chronological Evolution of Field Boundaries:
This modern intensification has led to a monoculture landscape in lowlands, causing severe habitat loss for birds and insects. In uplands, overgrazing by sheep frequently leads to soil erosion.
Following the last Ice Age, deciduous "Wildwood" covered around 75% of the UK. However, centuries of human clearance for shipbuilding and agriculture left the UK with only 5% forest cover by the end of World War I.
To fix the national timber shortage, the government established the Forestry Commission in 1919. Through massive afforestation, woodland coverage has now recovered to approximately 13%.
While these plantations create a monoculture that reduces native biodiversity, they do provide some environmental benefits. The dense tree roots bind the soil, reducing soil erosion, while the canopy intercepts rainfall, reducing downstream flood risk.
Although urban areas cover only 7–10% of UK land, they house over 80–90% of the population.
Early settlements were historically sited for natural physical advantages. For example, spring-line settlements like Fulking in the South Downs formed where permeable chalk met impermeable clay, creating a line of natural freshwater springs.
The Industrial Revolution (1760–1840) triggered a massive shift. In 1851, for the first time, more people lived in towns than in the countryside. Vast areas of woodland were cleared for factories and housing.
Modern urbanisation continues to alter the landscape through urban sprawl, frequently expanding onto previously undeveloped greenfield sites.
When analysing the speed of urbanisation, you may need to calculate the growth rate of a settlement using this formula:
Worked Example:
A town had a population of in . By , the population had grown to . Calculate the urban population growth rate.
Explain how urbanisation affects the physical landscape. (4 marks)
Step 1: State the human action. Building new roads and housing estates on greenfield land...
Step 2: Explain the physical change. ...replaces naturally permeable soils with impermeable concrete and tarmac.
Step 3: Explain the environmental mechanism. This prevents infiltration and heavily increases surface run-off into rivers.
Step 4: State the final landscape effect. As a result, this reduces the lag time on a storm hydrograph and actively increases the local risk of flooding.
Students often describe hedgerows as "natural" physical features. They are biological human boundaries deliberately planted to enclose land for farming.
When answering "Analyse" questions on landscape change, explicitly structure your answer in three steps: Cause (demand for food/timber) → Action (removal of hedgerows/planting conifers) → Effect (loss of biodiversity/bland landscape).
Examiners actively look for visual descriptors when discussing commercial forestry; always use terms like "straight lines", "uniform", "rectangular blocks", and "bland".
In 8-mark essay questions, a highly common theme is the "conflict" between human infrastructure and natural landscapes — for example, building reservoirs in upland National Parks to serve distant cities.
Always contrast upland field boundaries (geological dry stone walls) with lowland boundaries (biological hedgerows) to show a deep understanding of how physical geography dictates human building materials.
Land-use change
The process by which humans alter the natural landscape, primarily through agriculture, forestry, or urban development.
Pastoral farming
The practice of rearing livestock (e.g., sheep, cattle) for meat, wool, or dairy, common in rugged upland areas.
Dry stone walls
Traditional field boundaries built without mortar, commonly used in rugged upland areas where stone is abundant.
Arable farming
The practice of growing crops (e.g., wheat, barley) on land that is ploughed and cultivated, common in fertile lowland areas.
Hedgerows
Biological boundaries made of closely planted bushes and shrubs, typically used to enclose fields in lowland arable farming areas.
Enclosure
The historical legal process of consolidating small landholdings into larger, fenced or hedged farms, creating a planned patchwork landscape.
Monoculture
The agricultural practice of growing a single crop or tree species over a wide area, which often reduces biodiversity.
Afforestation
The process of planting trees on land that has not recently been covered by forest to create new woodland.
Conifer plantation
A large-scale forest of fast-growing evergreen trees planted in straight rows, typically managed for commercial timber extraction.
Urbanisation
The process by which an increasing proportion of a country's population lives in towns and cities.
Urban sprawl
The unplanned, uncontrolled, and often low-density expansion of an urban area into the surrounding countryside.
Greenfield site
An area of land that has not been built on before, typically used for agriculture or left as woodland.
Spring-line settlement
A line of settlements established where permeable rock meets impermeable rock, causing natural freshwater springs to emerge.
Conurbation
A large continuous urban area formed by the merging of two or more towns or cities.
Infrastructure
The basic physical structures and facilities (e.g., roads, railways, water supply) needed for the operation of a society or enterprise.
Infiltration
The process by which water soaks into the soil from the ground surface.
Surface run-off
The flow of water over the surface of the ground when it cannot infiltrate the soil, often due to impermeable surfaces like concrete or tarmac.
Lag time
The time difference between peak rainfall and peak river discharge during a storm event.
Storm hydrograph
A graph showing how a river's discharge (volume of water) changes over time in response to a specific rainfall event.
Put your knowledge into practice — try past paper questions for Geography A
Land-use change
The process by which humans alter the natural landscape, primarily through agriculture, forestry, or urban development.
Pastoral farming
The practice of rearing livestock (e.g., sheep, cattle) for meat, wool, or dairy, common in rugged upland areas.
Dry stone walls
Traditional field boundaries built without mortar, commonly used in rugged upland areas where stone is abundant.
Arable farming
The practice of growing crops (e.g., wheat, barley) on land that is ploughed and cultivated, common in fertile lowland areas.
Hedgerows
Biological boundaries made of closely planted bushes and shrubs, typically used to enclose fields in lowland arable farming areas.
Enclosure
The historical legal process of consolidating small landholdings into larger, fenced or hedged farms, creating a planned patchwork landscape.
Monoculture
The agricultural practice of growing a single crop or tree species over a wide area, which often reduces biodiversity.
Afforestation
The process of planting trees on land that has not recently been covered by forest to create new woodland.
Conifer plantation
A large-scale forest of fast-growing evergreen trees planted in straight rows, typically managed for commercial timber extraction.
Urbanisation
The process by which an increasing proportion of a country's population lives in towns and cities.
Urban sprawl
The unplanned, uncontrolled, and often low-density expansion of an urban area into the surrounding countryside.
Greenfield site
An area of land that has not been built on before, typically used for agriculture or left as woodland.
Spring-line settlement
A line of settlements established where permeable rock meets impermeable rock, causing natural freshwater springs to emerge.
Conurbation
A large continuous urban area formed by the merging of two or more towns or cities.
Infrastructure
The basic physical structures and facilities (e.g., roads, railways, water supply) needed for the operation of a society or enterprise.
Infiltration
The process by which water soaks into the soil from the ground surface.
Surface run-off
The flow of water over the surface of the ground when it cannot infiltrate the soil, often due to impermeable surfaces like concrete or tarmac.
Lag time
The time difference between peak rainfall and peak river discharge during a storm event.
Storm hydrograph
A graph showing how a river's discharge (volume of water) changes over time in response to a specific rainfall event.
