Hazardous Environments - Key Terms

Noah Swanson
Flashcards by Noah Swanson, updated more than 1 year ago
Noah Swanson
Created by Noah Swanson over 6 years ago
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IGCSE Geography (Hazardous Environments) Flashcards on Hazardous Environments - Key Terms, created by Noah Swanson on 03/30/2015.

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Question Answer
Adjustment Changes designed to react to and cope with a situation, such as the threat posed by a hazard.
Earthquake A violent shaking of the Earth’s crust.
Emergency Aid Help in the form of food, medical care and temporary housing provided immediately after a natural disaster.
Epicentre The point on the Earth’s surface that is directly above the focus of an earthquake.
Hazzard An event which threatens the well-being of people and their property.
Infrastructure The transport networks and the water, sewage and communications systems that are vital to people and their settlements and businesses.
Lahar A flow of wet material down the side of a volcano’s ash cone which can become a serious hazard.
Natural Disaster A natural event or hazard causing damage and destruction to property, as well as personal injuries and death.
Natural Event Something happening in the physical environment, such as a storm, volcanic eruption or earthquake.
Plate Movement Mainly the coming together and the moving apart of tectonic plates.
Prediction Forecasting future events or changes.
Pyroclastic Flow A devastating eruption of extremely hot gas, ash and rocks during a period of explosive volcanic activity; the downslope flow to this mixture is capable of reaching speeds up to 200kph.
Risk Assessment Judging the degree of damage and destruction that an area might experience as a result of a natural event.
Storm Surge A rapid rise in sea level in which water is piled up against the coastline to a level far exceeding the normal. It tends to happen when there is very low atmospheric pressure and where seawater is pushed into a narrow channel.
Subduction The pushing down of one tectonic plate under another at a collision plate margin. Pressure and heat convert the plate into magma.
Tropical Revolving Storm A weather system of very low-pressure formed over tropical seas and involving strong winds and heavy rainfall (also known as a cyclone, hurricane or typhoon).
Tsunami A tidal wave caused by the shock waves originating from a submarine earthquake or volcanic eruption.
Volcanic Activity The eruption.
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