GG231 Midterm: Midterm Notes Chapters 1-3, 9
Document Summary
Hazard any natural process that threatens human life or property. Risk the probably severity that a destructive event will occur multiplied by the event"s likely impact on people and property. Disaster/catastrophe events that cause serious injury, loss to life, and property damage over a limited time and within a specific geographic area. Financial loss from natural disaster exceeds billion per year. Average annual loss of life per year 150,000. Mitigation: efforts to prepare for disasters and to minimize their harmful effects. Divergent boundaries - occurs where two plates move away from each other and new lithosphere is produced. Convergent boundaries occurs where two plates collide head on. Crystallization of molten rock produces igneous rocks beneath and on earth"s surface. Sediments are converted to sedimentary rocks by lithification (compaction and cementation of sediment during burial) Sedimentary rocks may be metamorphosed by heat, pressure, and chemically active fluids into metamorphic rock.
