SCI 1101- Fall 2019| Online Lecture Guide Chapter 2 (Part Two): Section 2.3 Earths Physical Systems:Geologic & Natural Hazards Geologic and Natural Hazards Plate tectonics gives rise to creative forces that shape our planet. Earthquakes: How are they formed and when do they occur? Volcanoes: How are they formed, and when do they occur? Landslides: How are they formed and when do they occur? Mass Wasting: Tsunami: How are they formed and when do they occur? What are ways we can worsen or mitigate the impacts of natural hazards ?