Plate Tectonics Flashcards
What are the different layers of the earth?
Inner core, outer core, mantle and crust
What is the makeup of the crust
The inner metallic which is solidcore and the outer core which is in liquid form.
How thick is the crust meant to be.
Between 5-100km thick
What destructive plate boundaries?
Where one oceanic plate subducts under a Continental plate.
What are conservative plate margins?
Where tectonic plates slide past each other.
What are constructive plate boundaries?
Where two plates move apart which causes magma to rise up and fill the gap created between the two plates.
Key stats of the chile earthquake 2010.
-chile as a middle income country didn’t need foreign aid to recover.
-subduction of the Nazca plate under the South American one.
- 500 people were killed
-$30bn of damage
-landslides blocked some main roads but they were repaired in one day.
-30000 emergency shelters were built.
-there was a reconstruction plan to rebuild the 200000 households.
-magnitude of 8.8
Key facts from the Nepal earthquake 2015
-Nepal Is an LIC and therefore needed foreign aid.
Caused by the Indo-Australian and Eurasian plates.
-9000 deaths
-$5bn damage
-an avalanche on Mount Everest killed 19 people.
-non governmental organisations such as oxfam aided.
-300,000 people left Kathmandu the capital.
-7.8 matgnitude
What are the differences between continental and oceanic plates?
-Continental plates are older
-oceanic plates are thinner
-oceanic plates are more dense
What is the term for mudflows that occur as a secondary effect of an eruption?
Lahars
What is the term for mudflows that occur as a secondary effect of an eruption?
Lahars
What’s is the currently used scale for measuring earthquakes?
The moment magnitude scale
