Plate Tectonics Revision 6th year Geography Learning Outcome Revise Core Book Chapters 1 3 Plate Tectonics Earthquakes Volcanoes Examine the exam questions on these topics Theory of Plate Tectonics Earths plates move Landforms result
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Theory of Plate Tectonics Earths plates move
Landforms result<br>
04
Tectonic Cycle Continuous destruction and formation of the earth’s crust at plate boundaries.<br>
05
Theory of Plate Tectonics Wegener 1912
Continental Drift Hess
Sea Floor Spreading<br>
06
Destructive Plate Boundaries Collision of plates
Subduction
Volcanoes
Eg; Mount Saint Helens
Fold Mountains
Eg; Alps
Earthquakes
Eg; Kobe<br>
07
Constructive Plate Boundaries Plates separate
Rift Valley
Eg; African Rift Valley
Mid Ocean Ridges
Eg; Mid Atlantic Ridge<br>
08
Conservative Plate Boundaries Plates slide past each other
Earthquakes
Eg; Haiti 2010
Transform fault
Eg; San Andreas Fault<br>
09
Exam Questions – Plate Tectonics Explain how the theory of plate tectonics has aided our understanding of the occurrence of volcanic activity.
‘Plate boundaries are zones where crust is both created and destroyed.’ Examine the above statement with reference to examples you have studied.<br>
Effects Short Term Death
Destruction
Tsunamis
Fire
Homelessness Long Term Migration
Disease
Economic slowdown<br>
13
Case Study South East Asian Earthquake and Tsunami
December 2004
9.0 Richter Scale
Indian Plate slid beneath Burma Plate
Affected 11 countries
320,000 deaths
1.5 million people displaced<br>
14
Exam Questions - Earthquakes Examine how earthquakes are measured and may be predicted.
Describe and explain an earthquake that you have studied under the following headings;
Plates involved
What caused the earthquake
Long & Short Term Effects
Recovery<br>
Effects of Volcanoes Positive New land (Iceland)
Geothermal energy
Fertile soil
Tourism Negative Lava flows destroy and kill
Lahars destroy and kill
Poisonous gases harm health and kill
Ash can disrupt air travel<br>
20
Case Study Soufriere Hills, Montserrat, Carribbean.
Dormant for 300 years
Active since 1995
June 1997- 9 people killed, 100 homes destroyed.
Pyroclastic flow 160 kmph
24 hour monitoring- Montserrat Volcano Observatory<br>
21
Exam Questions Explain with the aid of an example you have studied why volcanic activity happens at plate margins.
Explain how the study of plate tectonics has helped us to understand the global distribution of volcanoes. Volcanoes can have both positive and negative effects. Examine the effects of a volcano that you have studied.<br>
