Natural Hazards Flashcards
What is the structure of the earth
Inner core
Outer core
Mantel
Crust
What are the two types of crusts and what are their characteristics
Oceanic - dense and thin
Continental - less dense and thick
What are convextion currents
Heat from the earth’s core which causes the mantle to move as the currents cool.
These currents will then slowly move the crust stound
Why do people live in hazardous areas
Fertile soil fro volcanoes for farming
People may be poor and can’t worry about that
Some volcanic areas are areas of high natural beauty which brings tourism jobs and
What does the destructive place margin do
As the oceanic and continental plate collides the oceanic plate is subduction
The friction causes earthquakes
The melting of the oceanic crust by the mantle forms magma for volcanoes
What is a constructive plate margin
Where plates are moving apart and magma from the mantle rises up to make new crust
The movement of the plates over the mantle can cause earthquakes
What is a Conservative plate boundary
Where two continental plates slide past eachother
Pressure builds up because of the friction and eventually results in an earthquake
