Paper one Flashcards
What is a Low Income Country (LIC)?
A country with a Gross National Income (GNI) per capita of $1045 or below.
What is a High Income Country (HIC)?
A country with a Gross National Income (GNI) per capita of $12746 or above.
What are Newly Emerging Economies (NEEs)?
Countries that have begun to experience higher rates of economic development, usually with higher levels of industrialisation, such as Brazil, Russia, China, and South Africa.
What is a Conservative plate margin?
A tectonic plate margin where two tectonic plates slide past each other.
What is a Constructive plate margin?
A tectonic plate margin where rising magma adds new material to plates that are diverging or moving apart.
What is a Destructive plate margin?
A tectonic plate margin where two plates are converging, causing oceanic plate subduction, often associated with violent earthquakes and explosive volcanoes.
What is monitoring in the context of natural hazards?
Recording physical changes, such as earthquake tremors around a volcano, to help forecast when and where a natural hazard might strike.
What is planning in relation to natural disasters?
Actions taken to enable communities to respond to and recover from natural disasters, such as emergency evacuation plans and warning systems.
What is prediction regarding natural hazards?
Attempts to forecast when and where a natural hazard will strike, based on current knowledge.
What are primary effects of a natural event?
The initial impact of a natural event on people and property, caused directly by it.
What are secondary effects of a natural event?
The after-effects that occur as indirect impacts of a natural event, sometimes on a longer timescale.
What is a tectonic plate?
A rigid segment of the Earth’s crust which can ‘float’ across the heavier, semi-molten rock below.
What is a volcano?
An opening in the Earth’s crust from which lava, ash, and gases erupt.
What is the economic impact of an event?
The effect of an event on the wealth of an area or community.
What is the environmental impact of an event?
The effect of an event on the landscape and ecology of the surrounding area.
What is global atmospheric circulation?
The worldwide system of winds that transports heat from tropical to polar latitudes.
What are management strategies in the context of natural hazards?
Techniques of controlling, responding to, or dealing with an event.
What is adaptation in relation to climate change?
Actions taken to adjust to natural events such as climate change, to reduce potential damage or cope with the consequences.
What is mitigation in relation to natural hazards?
Action taken to reduce or eliminate the long-term risk to human life and property from natural hazards.
What are orbital changes?
Changes in the pathway of the Earth around the Sun.
What is biodiversity?
The variety of life in the world or a particular habitat.
What is commercial farming?
Farming to sell produce for a profit to retailers or food processing companies.
What is ecotourism?
Responsible travel to natural areas that conserves the environment and sustains the wellbeing of local people.
What is selective logging?
The cutting out of mature or inferior trees to encourage the growth of the remaining trees.
What is soil erosion?
Removal of topsoil faster than it can be replaced, due to natural and human activity.
What is subsistence farming?
A type of agriculture producing food and materials for the benefit only of the farmer and his family.
What is desertification?
The process by which land becomes drier and degraded due to climate change or human activities.
What is a hot desert?
Parts of the world that have high average temperatures and very low precipitation.
What is a dam and reservoir?
A barrier built across a valley to interrupt river flow and create a man-made lake.
What is abrasion in river landscapes?
Rocks carried along by the river wear down the river bed and banks.
What is attrition in river landscapes?
Rocks being carried by the river smash together and break into smaller, smoother, and rounder particles.
What is the cross profile of a river?
The side to side cross-section of a river channel and/or valley.
What is attrition in river landscapes?
Rocks being carried by the river smash together and break into smaller, smoother and rounder particles.
What is a cross profile?
The side to side cross-section of a river channel and/or valley.
What is a dam and reservoir?
A barrier built across a valley to interrupt river flow and create a man-made lake (reservoir) which stores water and controls the discharge of the river.
What is discharge in the context of rivers?
The quantity of water that passes a given point on a stream or river-bank within a given period of time.
What are embankments?
Raised banks constructed along the river to make it deeper and hold more water.
What is an estuary?
The tidal mouth of a river where it meets the sea; wide banks of deposited mud are exposed at low tide.
What is a flood plain?
The relatively flat area forming the valley floor on either side of a river channel, which is sometimes flooded.
What is flood plain zoning?
Attempts to organise flood defences so that land near the river that often floods is not built on.
What are flood relief channels?
New artificial channels used when a river is close to maximum discharge to reduce flood risk.
What is a flood warning?
Providing reliable advance information about possible flooding.
What are fluvial processes?
Processes relating to erosion, transport and deposition by a river.