Year 13 – 2009 – Unit 3 – Plate Tectonics

Plate tectonics and associated hazards

Plate Movement

Earth structure, plate tectonics theory: convection currents and sea-floor spreading. Evidence: continental drift and palaeomagnetism.

4 hours

 

Destructive, constructive and conservative plate margins. Processes: seismicity and vulcanicity. Associated landforms: young fold mountains, rift valleys, ocean ridges, deep sea trenches and island arcs.

4 hours

 

Hot spots associated with plumes of magma and their relationship to plate movement.

4 hours

 

 

Vulcanicity

Variations in the type and frequency of volcanic activity in relation to types of plate margin and types of lava.

 

Minor forms of extrusive activity – geysers, hot springs and boiling mud

 

Major forms of extrusive activity – types of volcanoes

10 hours

 

Two case studies of recent (within the last 30 years) volcanic events should be undertaken from contrasting areas of the world.  In each case, the following should be examined:

The nature of the volcanic hazard

The impact of the event

Management of the hazard and responses to the event.

10 hours

 

Seismicity

The causes and main characteristics of earthquakes: focus and epicentre; seismic waves and earthquake measurement

 

Tsunamis – characteristics and causes.

12 hours

Two case studies of recent (within the last 30 years) seismic events should be undertaken from contrasting areas of the world.  In each case, the following should be examined:

The nature of the seismic hazard

The impact of the event

Management of the hazard and responses to the event.

16 hours

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