Natural Hazards Flashcards
What does hazard risk mean
The probability a hazard will take place
What does hazard risk mean
The probability a hazard will take place
What is the relief phase in hazard response
Immediate response for search , rescue and care only requiring essential equipment and resources
What is the relief phase in hazard response
Immediate response for search , rescue and care only requiring essential equipment and resources
What is the rehabilitation phase
A phase which lasts for months , at least temporarily restoring physical and community structures
Whatbis the reconstruction, mitigation and preparedness phase in hazard response
Permanent changes are made to improve upon or restore life pre disaster -
What does the earth’s structure look like
Lithosphere
Asthenosphere
Mantle
Outer core
Inner core
What does the earth’s structure look like
Lithosphere
Asthenosphere
Mantle
Outer core
Inner core
How do convection currents work
- Heat comes from radioactive decay in core
- The mantle rises as its less dense from the melting
- The semi- molten rock reaches the top carrying the plate with it
4.the plate moves in the direction of the convection current below
5 rock cools back down the mantle to be reheated
What is slab pull
The pull of gravity on a plate that’s being subducted
What is ridge push
The process of material pushing out from the ridge
Economic factors influencing hazard perception
In more developed areas of the world we are reminded on all manner of events which means we may perceive the event to be worse than it is
Poorer Nations may consider risk vs reward -less stuff to be damaged by event
Lack of education
What is Paleomagnetism
New material is pushed out the mjd ocean ridge and takes thr magnetism of the earth at the time .
Since rhe earth’s magnetism randomly flips we can match the striped patterns to age
What is jig saw future in plate tectonics
How south America and West africa looks like they fit together with their coastlines
Wyat is geological fit in palte tectonics
Thr geology of south America and West africa has ancient cratons which are continuous from one continent to another
