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Divergent Boundary- Magma rises and pushes plates apart in opposite directions. Most common place of the Divergent Boundary is the Mid-Atlantic Ridge. Causes sea floor spreading.

Convergnet Boundary- A plate collides with or divides under another. Causes major moutain buliding. Good example is the Himalayas. Transform Boundary- Two plates grind against each other than rise. A good is the San Andreas. Causes earthquakes. Earthquakes- About 80% of all the planet's earthquakes occur along the rim of the Pacific Ocean. They also occur a lot at fault zones, where tectonic plates collide or slide against each other. One of man's greatest fears is that a earthquake will open and swallow everything and everyone in it's way. An earthquake with a magnitude of 8 (highest) strikes at least once a year somewhere in the world killing at least 10,000 people per earthquake. Volcanoes- Active volcanoes in the US are found mainly in Hawaii, Alaska and the Pacific Northwest. Volcanic ash is pulverized rock, acidic, gritty, grassy, and it is odorous. It isn't dangerous to adults right away. It does cause immediate damage to young children or people with heart problems. It can effect some people as far away as hundreds of miles away. About 90% of all volcanoes are within the Ring Of Fire along the edges of the Pacific Ocean. Volcanoes are along the edges between tectonic plates, large rock slobs that make up the Earth's surface. The Kilavea and Unzen volcanoes erupt every several months. And the Yellowstone and Toba erupt every 100.000 years.

Bibliography: "Earthquakes." //National Geograpihc//. N.P., 1996. Web. 15 Nov. 2009. .

"The Dynaimc Earth." //Nation Geographic//. N.P., 1996. Web. 15 Nov. 2009. .

"Himalayas Mountains ." //Himalayas Mountains//. N.P., 2000. Web. 17 Nov. 2009. .