EARTHSC 2GG3 Final: Final Exam review
6 May 2016
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The examination paper must be returned with your answers. Natural hazard, natural disaster, and catastrophe (lecture 2) When a natural event become extreme in its occurrence, it poses a danger to human life and property. A hazard is a natural disaster when the event causes significant damage to life or property. A natural disaster should be defined on the basis of its human consequences, not on the phenomenon that caused it. A natural event is a catastrophe when it kills or injuries large numbers of people or causes extensive property damage. Plate tectonics: earth structure, plates, and continental drift. Theory (lectures 3-4: lithosphere stiff and rigid outer rind of the earth, asthenosphere - inner, hotter, easily deformed part of the earth, mantle - is a rocky shell about 2,900 km thick that constitutes about 84% of. Most of the earthquakes and volcanoes occur along or near tectonic plate boundaries.
