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1. The origin of most earthquakes is always along a __________________,where to plates move past each, but because they are not smooth, they get stuck creating tension.
3. At the center of a mature tropical cyclone, air sinks rather than rises. Because the weather in the center is normally calm and free of clouds, the center has been given this nickname.
5. This type of air feeds the tornado and makes it stronger.
7. Tornadoes are ranked by the damage they do. This ranking is an enhanced version of this scale.
9. A phenomenon of tsunamis where the initial wave may occur as the shoreline recedes dramatically, exposing normally submerged areas.
11. This type of tornado forms when a strong updraft hits the ground on a very hot day.
12. The physical shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's crust that creates seismic waves.
13. This types of tornado typically forms over forest fires.
14. A rapidly rotating storm system characterized by a low-pressure center, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain.
16. This type of tornado is a small vertical swirl associated with a downburst.

2. A violently rotating column of air that is in contact with both the surface of the earth and a cloud.
4. The cloudy outer edge of the center of tropical cyclone is nicknamed this. It is is where the greatest wind speeds are found.
6. An extremely strong thunderstorm that may produce a tornado.
8. This type of tornado is both formed and found only over water.
10. Tornadoes have been observed on every continent except this one.
11. Topical _________________ is what you rank the be beginning stages of a hurricane. It is an organized system of clouds and thunderstorms with a defined, closed surface circulation.
15. A series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake.