The restless earth Flashcards
Types of plate and describe
oceanic- on the sea, heavier, less dense
continental- on land, lighter , more dense
3 types of plate boundaries and explain
destructive- come together
constructive- move apart
conservative- slide past each other
Explain how fold mountains are formed
sediment carried into sea by rivers and lakes.
the plates move together compressing the sediment
this then become sedimentary rock
the plates continue moving towards each other and this pushes the rock up and out to form fold mountains
5 uses of fold mountains
case study
forestry tourism farming mining HEP Alps
types of volcanoes and describe
composite and shield volcanoes
composite- steep sides, made up of ash and lava, on destructive and constructive
shield- steady sided slopes, runny lava, made up of layers of just lava
Signs for a volcano
look for bulges tiny earthquakes escaping gases seismometer satellite tiltmetre
Case study for volcano
mount st helens 63 died crater was 3km long areas covered in material vegetation destroyed homes destroyed responses= people evacuated, shelters built, temporary infrastructure, emergency services etc.
Describe how a super volcano forms
magma rises through cracks onto the earth surface to form a bulge.
bulge cracks causing vents for magma to rise and erupt
leaves huge crater
Case study of super volcano
yellowstone thousands of cubic km of ash block out daylight planes not able to fly ash will settle everywhere
Earthquakes. what plates
how they happen and how they are measured
destructive, constructive and conservative plates jurk or jult send out shock waves richter scale= measure the energy mercali scale= measure the damage
case study of earthquake MEDC
Japan 15000 dead destructive plate margin effects= destruction, tsunami etc responses= aid etc
case study earhtquake LEDC
Kobe
many died etc
