Plates And Natural Disasters Flashcards
Explain how evidence supports Plate Tectonic Theory
P: there are many types of evidence of it being true.
E: shown by earthquakes/volcanos on the boundaries between plates.
E: 99% of natural disasters are formed along the boundaries and form a line of them.
L: link to start.
Explain why earthquakes and volcanoes are found along plate boundaries
P: this is due to plates colliding with each other.
E: two plates collide and the denser one slides under (volcano) and two plates slide past each other (earthquake).
E: dense plate melts in magma and it rises, causing pressure (volcano) and pressure&friction applies (earthquake).
L: link to start.
Explain how earthquakes and volcanoes occur at Destructive plate boundaries
P: they occur when they move towards each other.
E: two plates collide and the denser one slides under (volcano) and two plates slide past each other (earthquake).
E: dense plate melts in magma and it rises, causing pressure (volcano) and pressure&friction applies (earthquake).
L: link to start.
Explain how earthquakes and volcanoes occur at Constructive plate boundaries
P: they occur when moving away from each other.
E: EQ- magma rising.
V- magma rising.
E: EQ- fractures the crust slightly causing minimal damage.
V- it rises as the crust is moving away, also forms new land.
L: link to start.
Explain the effects of the Montserrat volcano (including facts)
Three examples:
-75% of population left due to risk+bad economy.
-Tourists stayed away for the following year
as resorts were damaged - income was lost
and jobs and the reputation were affected.
-20 villages and 2/3 of buildings destroyed.
Explain why human and physical factors caused the Haiti earthquake to be so destructive
Three examples:
-Approximately 220,000 people were killed
and 300,000 were injured
-Over 2 million Haitians were left without
food and water.
-Conservative plate boundary between North America and Caribbean plates.
