2. Natural Hazards and Our Dynamic Planet LAB 7

3. What natural hazards do dynamic events cause? Our planet is dynamic because it is powerful, active Our planet is dynamic because it is powerful, active and ever-changing. Key Question:

4. Convection in the mantle causes the tectonic plates to move and interact with each other. Natural hazards such as earthquakes & volcanoes to occur at plate boundaries. Natural hazards such as earthquakes & volcanoes to occur at plate boundaries.

5. Recent Earthquakes Volcano Hazards Program

6. Consider what might happen if an earthquake occurred in your community... -What would happen to dams, reservoirs, or water supply stations? -What would happen to schools, homes, and government buildings? -What would happen to electrical power plants and power lines? -What would happen to local hospitals?

7. Earthquake Hazards Buildings and bridges collapse Roads crack Fires blaze due to ruptured gas lines Landslides occur because shaking cause rock to slide downhill Earthquake vibrations can cause wet soil to act like quick sand (Liquefaction) Dams fail and cause flooding

8. Local conditions Earthquakes cannot be predicted… As population continues to increase building on active seismic zones is unavoidable These are some factors to consider when assessing potential earthquake hazards for a particular area: Closeness to active earthquake faults Seismic history of the region Building construction Earthquake Magnitude Simulation

9. Natural hazards such as volcanic eruptions also occur at plate boundaries Natural hazards such as volcanic eruptions also occur at plate boundaries Hazards from a volcanic eruption vary based on the type of volcano

10. Consider what might happen if an volcanic eruption occurred in your community... -What would happen to dams, reservoirs, or water supply stations? -What would happen to schools, homes, and government buildings? -What would happen to electrical power plants and power lines? -What would happen to local hospitals?

11. Low Gas Content

12. High Gas Content

13. Lava streams burn all in their path Aircrafts endangered from ash in the atmosphere Roofs collapse, cities and surrounding landscape covered from ash fall & flow Volcanic pollution Volcano Hazards

14. Volcanic eruptions can be predicted… The surface of the volcano swells upward Gases begin to escape from around the volcano Minor earthquakes in the area beneath the volcano become much more common