Plate boundaries and the distribution of tectonic hazards

Question 1

Convergent/Destructive Plate Boundaries

Answer 1

2 plates move together and form either a subduction zone or continental collision.
Causes earthquakes and volcanoes.
Continental+oceanic = subduction zone= surface volcanism usually
2 continental = mountain ranges.
Most explosive type of boundary.

Question 2

Transform/conservative

Answer 2

Plates slide against each other horizontally. Cause extensive shallow focus earthquakes of high magnitude

Question 3

Divergent/constructive

Answer 3

Plates move away from each other.
Magma can rise to fill the gap causing volcanoes to form.
Creates shield volcanoes at mid ocean ridges.
Mid Atlantic ridge has basaltic lava which has low viscosity.

Question 4

Hazard vs Disaster

Answer 4

A hazard is a potential issue, a disaster is what happens

Question 5

Oceanic Crust

Answer 5

thin
under the sea
denser
mainly made of basalt

Question 6

continental crust

Answer 6

thick
land
less dense
mainly made of granite
floats as it has a lower density that the higher density mantle below

Question 7

Hotspot Volcanoes

Answer 7

found in the middle of tectonic plates (intra-plate volcanism). Heating from a mantle plume causes melting and thinning of the crust, which leads to volcanic activity on the surface.