Natural Hazards Flashcards
Learn about natural hazards, how they happens and responses.
What are the two classifications of natural hazards?
Geological and meteorological hazards.
What are geological hazards?
Hazards that are caused by tectonic plate movement.
What are meteorological hazards?
Hazards that are caused by the weather and climate.
Definition of natural hazard?
A natural process which has potential to cause death, injury or disruption to humans, or destroy property and possessions.
Examples of Geological hazards?
Earthquakes, volcanoes, avalanches, landslides.
Examples of Meteorological hazards?
Monsoons, blizzards, tropical storms, tornadoes.
Name the four plate margins?
Constructive margins, Conservative margins, Collision margins and Destructive margins.
What happens at a destructive margin?
The plates are coming together at this margin. The more dense Oceanic plate is subducted under Continental Crust.
What happens at a constructive plate margin?
The plates are moving apart from each other. Magma rises in the gap and ‘constructs’ new land.
What happens at a conservative margin?
The plates are moving side by side, either with eachother at different speeds or in opposite directions.
What happens at collision margins?
The plates are coming together again but since they’re similar in density, they push up to create fold mountains.
What are the factors affecting hazard risk?
Vulnerability, capacity to cope and nature of hazards.
What does the vulnerability factor of hazard risk mean?
Higher population densities being exposed to naturally hazardous areas.
What does the capacity to hope factor of hazard risk mean?
If a population can afford to cope from a hazard, risk is lowered.
What are the 3 factors to do with the nature of hazards?
Type of hazard, Frequency of hazard, Magnitude of hazard.
