Plate Margins Flashcards
What is the name of the upper portion of the mantle?
Click to View the Answer
Click to View the Question
The asthenosphere
What is the name of the upper portion of the mantle?
What is a natural hazard?
Click to View the Answer
Click to View the Question
A natural hazard is a natural event such as an earthquake, volcanic eruption, tropical storm or flood that has the potential to cause death and damage.
What is a natural hazard?
Give an example of two tectonic plates that form a destructive plate margin
Click to View the Answer
Click to View the Question
Pacific and the Eurasian plate, Nazca and South American plate, Philippines and Eurasian plate and the Indo-Australian and Pacific plate.
Give an example of two tectonic plates that form a destructive plate margin
Give one reason why the incidence of natural hazards is increasing.
Click to View the Answer
Click to View the Question
Reasons include:
- Climate change
- Deforestation
- Urbanisation
- Population increase
Give one reason why the incidence of natural hazards is increasing.
Describe the physical processes that happen at constructive plate margin.
Click to View the Answer
Click to View the Question
At a constructive plate margin magma rises between two tectonic plates. The plates move away from each other due to ridge push and slab pull. The magma cools to form a new plate. On land rift valleys form such as the East African rift valley. Where two oceanic plates move apart new islands can be formed e.g. Iceland.
Describe the physical processes that happen at constructive plate margin.
