Key Defintion - Natural Hazards Flashcards
Natural hazards
A natural event (e.g. An earthquake or flood) that threatens people or has the potential to cause damage, destruction and death.
A natural event (e.g. An earthquake or flood) that threatens people or has the potential to cause damage, destruction and death.
Natural hazards
Hazard risk
The probability or chance that a natural hazard may take place.
The probability or chance that a natural hazard may take place.
Hazard risk
Tectonic pate
A rigid segment of the earth’s crust which can “float” across the heavier, semi-molten rock below.
A rigid segment of the earth’s crust which can “float” across the heavier, semi-molten rock below.
Tectonc plate
Volcano
An opening in the earth’s crust from which the lava, ash and gases erupt.
An opening in the earth’s crust from which the lava, ash and gases erupt.
Volcano
Constructive plate margin
A tectonic plate margin where rising magma adds new material to plates that are diverging or moving apart.
A tectonic plate margin where rising magma adds new material to plates that are diverging or moving apart.
Constructive plate margins
Destructive plate margin
A tectonic plate margin where two plates are converging or coming together and the oceanic plate is subducted.
A tectonic plate margin where two plates are converging or coming together and the oceanic plate is subducted.
Destructive plate margin
Conservative plat margin
A tectonic plate margin where two plates slide past each other.
A tectonic plate margin where two plates slide past each other.
Constructive plate margin
Primary effects
The intial impact of a natural event on people and property, caused by it; for instance, building collapsing following on earthquake.
The intial impact of a natural event on people and property, caused by it; for instance, building collapsing following on earthquake.
Primary effects
Secondary effects
The after-effects that occur as indirect impacts of a natural event, sometimes on a longer timescale. E.g fires due to ruptured gas mains.
The after-effects that occur as indirect impacts of a natural event, sometimes on a longer timescale. E.g fires due to ruptured gas mains.
Secondary effects
Immediate responses
The reaction of people as disaster happens and in the immediate aftermath.
The reaction of people as disaster happens and in the immediate aftermath.
Immediate responses
Long term responses
Later reactions that occur ininthe weeks, months and years after an event.
