AQA • 8035 • 1,097 key terms
Abiotic
The non-living physical components of an environment, such as sunlight, temperature, water, and soil.
From: Hot Desert Characteristics, Interdependence and Adaptations
Abiotic factors
The non-living parts of an ecosystem, such as climate, soil, light, water pH, and litter.
From: Interrelationships and Balance in Small-scale UK Ecosystems
Ablation
The loss of glacial ice, primarily through melting at the snout of the glacier.
From: Glacial Deposition and Identification of Landforms
Abrasion
The process where the river's load scrapes and grinds against the bed and banks like sandpaper, wearing them away.
From: River Profiles and Fluvial Processes
Access to Safe Water
The percentage of people who can obtain water that is not contaminated by harmful bacteria or parasites.
From: Measuring Global Development and its Limitations
Accuracy
How close a measured value is to the true, real-world value, often improved by using better equipment.
From: The Geographical Enquiry Process
Active layer
The top layer of soil in Tundra biomes that thaws briefly during the summer months, allowing shallow-rooted plants to grow.
From: Global Distribution and Characteristics of Ecosystems
Adaptation
Actions taken to adjust to the effects of climate change to reduce potential damage, cope with consequences, or take advantage of new opportunities.
From: Managing Climate Change
Aeroponics
Growing plants in an air or mist environment without soil, where roots are sprayed with nutrients.
From: Strategies and Large-Scale Schemes to Increase Food Supply
Afforestation
The process of planting trees in an area where there was previously no forest cover to create a natural carbon sink.
From: Managing Climate Change
Ageing population
A population where the proportion of older people (usually aged 65+) is increasing relative to younger people.
From: Social and Economic Change in Rural Landscapes
Agouti
A rainforest rodent that plays a crucial role in the seed dispersal and reproduction of the Brazil nut tree.
From: Characteristics and Adaptations in Tropical Rainforests
Agribusiness
Large-scale commercial farming and the businesses associated with it, such as packing and research.
From: Strategies and Large-Scale Schemes to Increase Food Supply
Agroforestry
A sustainable farming system where trees or shrubs are grown around or among crops to maintain soil structure and canopy cover.
From: The Value and Sustainable Management of Tropical Rainforests
Aid dependency
When a country relies heavily on external donors for funding basic services, hindering its ability to become self-sufficient.
From: Global Relationships: Trade and International Aid
Aim
A clear statement defining the overall goal or purpose of the fieldwork investigation.
From: The Geographical Enquiry Process
Albedo
The proportion of incident light or solar radiation that is reflected by a surface, such as ice or snow.
From: Global Atmospheric Circulation
Albedo effect
The extent to which a surface reflects light from the sun; highly reflective surfaces like white plastic roofs cause a localised cooling effect by reflecting solar radiation.
From: Strategies and Large-Scale Schemes to Increase Food Supply
Alluvium
Fine-grained, fertile soil made of silt and clay that is deposited on a floodplain.
From: River Profiles and Fluvial Processes
Alternative Energy
Energy sources used as an option to traditional fossil fuels, including both renewable (wind, solar) and non-renewable (nuclear) sources.
From: Managing Climate Change
Amenities
Useful features or facilities of a building or place, such as shops, parks, and transport links.
From: Written Communication
Anaerobic decay
The breakdown of organic matter by bacteria in the absence of oxygen, such as in flooded rice paddies, which releases methane.
From: Causes of Climate Change
Analytical connectives
Linking words or phrases used to build causal chains, such as 'consequently', 'therefore', or 'as a result'.
From: Geographical Writing and Communication
Annotated diagram
A sketch or photograph with descriptive text added to describe specific features and geographical processes.
From: Geographical Writing and Communication
Annotation
An explanatory note added to a diagram or sketch that describes a geographical characteristic or process.
From: Photographs, Sketches and Cross-Sections
Anomalies
Data points or results that do not fit the general pattern or trend of a dataset.
From: Data Sources and Types
Anomaly
A data point or result that does not fit the overall pattern or trend.
From: The Geographical Enquiry Process
Anomaly (A)
A data point that does not fit the general trend or deviates significantly from the line of best fit.
From: Data Presentation and Analysis
Anticyclones
High-pressure systems bringing stable, dry weather, which can mean clear and hot conditions in summer or cold and frosty weather in winter.
From: UK Weather Hazards and Extreme Events
AO1
Assessment Objective 1, which tests knowledge and case study facts.
From: Constructing Arguments and Drawing Conclusions
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