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EDEXCEL GEOGRAPHY 6GE01
WORLD AT RISK: KEY TERMS
Key term Definition
Any change in the structure or functioning of an organism or system that makes it
Adaptation better suited to the environment.
Evergreen forests which occur naturally between 55°and 66° North where winters are
Boreal forest long and very cold. Also known as coniferous forest.
A way to reduce greenhouse gas emissions in industry by putting a value and a limit to
a company's emissions and allowing the company to sell its emissions shortfall or to
Carbon credits buy carbon credits if it exceeds its limit. Carbon credit can be used to finance carbon
The act of mitigating greenhouse gas emission, e.g. by asking people or companies to
Carbon offsetting pay extra for air travel.
Reservoirs of carbon dioxide. The main natural sinks are the oceans and plants that use
Carbon sinks photosynthesis to remove carbon from the atmosphere
Deep sea core A cylindrical section of the Earth's crust removed from the ocean floor. The layers in
samples the core sample tell us about the geologic history of the area
Where two tectonic plates meet and where the denser plate
Destructive is being destroyed by diving under the less dense plate and
boundary being converted to magma
Disaster When a natural hazard has serious effects such as a large loss of life or property.
The increase in the natural greenhouse effect, said to be caused by human activities
greenhouse which increase the quantity of greenhouse gases in the atmosphere
Exponential A rate of increase which becomes faster and faster
To do with the nature and history of landforms and the processes which create them
Another term for the thermolhaline circulation
Greenhouse The warming of the atmosphere as some of its gases absorbs the heat given out by
effect the Earth.
Greenhouse The gasses which retain heat within the Earth's atmosphere and contribute to global
gasses warming e.g. carbon dioxide, nitrous oxide and methane
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EDEXCEL GEOGRAPHY 6GE01
International Panel on Climate Change a united nations organisation which looks at the
IPCC evidence and publishes reports on the human impact on climate change
Lahars A flow of volcanic debris, either dry or mixed with water as a mud flow
Magma chamber A large underground pool of molten rock lying under the surface of the earth's crust
Where the mouths of several large rivers emerge close together, e.g.…read more