1. DESTRUCTIVE FORCES Mr. Auchstetter’s World Cultures

2. 5 Major Types of Destructive Forces Hurricanes Volcanoes Earthquakes Tornadoes Tsunamis

3. Hurricanes

4. Hurricane Info A hurricane is a severe tropical storm that forms in the shape of a top or a pinwheel. Hurricanes need warm tropical oceans (82 desgrees), moisture and light winds above them. If the right conditions last long enough, a hurricane can produce violent winds, incredible waves, torrential rains and floods. Winds can reach above 155 mph.

5. Hurricane Info Hurricanes rotate in a counterclockwise direction around what is called an "eye." In order to be considered a hurricane, winds must reach 74 mph.

6. Hurricane Names

7. The Earth’s Layers

8. Volcanoes A volcano is a vent in the Earth's surface through which magma (molten rock) and gases erupt.

9. RING OF FIRE

10. Ring of Fire (cont’d)

11. Plate Tectonics

12. Earthquakes Earthquakes are a transfer of stress that is built up from the friction of the shifting of the tectonic plates. The Richter scale is calculated from the amplitude of the largest seismic wave recorded for the earthquake. Each whole number you go up on the Richter scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. http://www.iris.edu/gifs/animations/faults.htm

13. Earthquakes

14. Tornadoes Tornadoes are produced when cool dry air meets warm humid air. This causes the atmosphere to become unstable. Tornadoes are known to produce hail and a greenish sky.

15. Tornadoes

16. The Fujita Scale vs. the Enhanced F-Scale F Number Fastest 1/4-mile (mph) 3 Second Gust (mph) EF Number 3 Second Gust (mph) EF Number 3 Second Gust (mph) 040-7245-78065-850 173-11279-117186-109186-110 2113-157118-1612110-1372111-135 3158-207162-2093138-1673136-165 4208-260210-2614168-1994166-200 5261-318262-3175200-2345Over 200

17. Tsunami A tsunami is a series of large waves of extremely long wavelength and period usually generated by a violent, impulsive undersea disturbance or activity near the coast or in the ocean. Tsunamis can be formed from earthquakes and volcanic eruptions.

18. Tsunami