Hazards Key concepts (Volcanoes and Earthquakes)

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10 Terms

1
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What are the 4 Hazard Management Concepts?

Preparation, Mitigation, Adaptation, Prevention

2
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What are the primary hazards that can occur after a volcanic eruption?

Pyroclastic Flows, Lava Flows, Ash and Tephra, Gases

3
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What are the Secondary hazards that can occur after a volcanic eruption?

Lahars, Acid rain, Climate cooling

4
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Which 5 factors affect hazard risk?

Climate change, urbanisation, level of development, corruption in governments

5
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What is the evidence for plate tectonics?

Connected mountain ranges, Glaciation found in hotter countries, Evidence of fossils

6
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What are the characteristics of an oceanic plate?

Thinner, denser, made of basalt

7
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What are the characteristics of a continental plate?

Thicker, less dense, made of granite

8
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What hazard can be generated by mega thrust earthquakes?

Tsunamis

9
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What can be used to mitigate against earthquakes?

Geographic information systems (GIS), surveys, analysis, zoning

10
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What leads to a high explosivity in volcanoes?

High silica content