EARTHSC 2GG3 Lecture Notes - Lecture 1: Plate Tectonics, Igneous Rock, Water Cycle
24 Dec 2016
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Hazards affect millions of people around the world each year. Within na, every location is at risk from at least one hazardous process. Mid-continent: tornadoes(severe thunder storms), blizzards(different than a snow storm) Natural hazards can arise from three main processes: internal forces within the earth. Driven by earth"s internal energy e. g. plate tectonics-heat and pressure moves plates. External forces on earth"s surface - driven by sun"s energy e. g atmospheric effects- hurricanes, blizzards. Driven by force of gravity e. g. landslides, avalanches(downslope movement) Natural hazard: a natural process that poses a potential threat to people and/or property. The probability of an event occurring multiplied by the impact on people and property e. g. ontario low risk of earthquakes high risk of thunderstorms. Disaster: a brief event that causes great damage or loss of life. Japan: hurricane caused a tsunami haiti: earthquake new orleans: hurricane katrina thailand:
