Hazards and Structure of the Earth Flashcards
Do volcanoes and earthquakes occur at all plate margins?
Click to View the Answer
Click to View the Question
Volcanoes and earthquakes occur at all plate boundaries except at a conservative margin where only earthquakes happen.
Do volcanoes and earthquakes occur at all plate margins?
What factors affect hazard risk?
Click to View the Answer
Click to View the Question
Factors include:
- An increase in the number of people vulnerable to the natural hazard (e.g. population growth & increased population density close to hazard-prone areas)
- An increase in the frequency and magnitude of the natural hazard
- A decrease in the number of people capable of coping with the natural hazard
What factors affect hazard risk?
Some volcanoes occur in the middle of plates. What are these known as?
Click to View the Answer
Click to View the Question
Volcanic hotspots
Some volcanoes occur in the middle of plates. What are these known as?
What are the characteristics of the mantle?
Click to View the Answer
Click to View the Question
The thickest section of the Earth. Approximately 2900km.
It is made up of semi-molten rock called magma.
What are the characteristics of the mantle?
Give two possible reasons why tectonic plates move.
Click to View the Answer
Click to View the Question
Convection currents & Slab pull (+ ridge push).
Give two possible reasons why tectonic plates move.
