ERTH 2415 Midterm: Midterm 1-Review Notes.docx
Document Summary
Metrics: frequency: number of occurrences of similar events per unit of time (eg caribbean storms affect atlantic canada 4x per year, return period: length of time between similar events (eg severe hurricanes occur in the. Us about every 6 years. : magnitude: amount of energy fuelling a natural disaster event (eg force of hurricane winds, or of an earthquake. ) Origin of the solar system: formation of solar nebulla, gravity: force of attraction between masses m &m separated by a distance of r. 2: other very far: comets, stable, water/ice further giants: jup, saturn, uranus, nep->icy, differentiation of earth, caused by gravity causing denser materials to gradually migrate to the centre of the planet, centre is hot because of radioactive decay. Global trends: man-made disasters decreasing in recent years, emerging health and safety, economics, # of great natural disasters increasing with time, geological disasters staying constant (earthquakes, tsunami, weather realated going up (drought, flood etc)
