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Divergent boundaries Magma rises and pushes plates apart. Then mountains and volcanoes rise among the seem. This renews the ocean floor and widens the great basins. Then if plates keep spreading apart, land will break off of a continent. Oceanic and Continental are some of the divergent plate boundaries. One example is the giant crack in Africa, its also spreading the Red Sea. The crack is in Ethiopia, Africa. The plates that cause this are the African Plate and the Arabian Plate. Another example is the Mid-Atlantic Ridge. Its in the middle of the Atlantic Ocean. The plates that cause this are the North American Plate and the African Plate. One last example is the East African Rift Valley. It is in the Red Sea. The plates that make this are the African Plate and the Arabian Plate.

Transform Boundaries This happens when plates grind against each other. Plates can rub by each other from side to side, up and down, and diagonal. They don't form mountains or volcanoes, but the often create earthquakes. One example is the San Andreas Fault Zone. The plates that form this are the Juan De Fuca plates and the North American Plate. Another example is the Puerto Rico Trench. The plates that form the trench are the North American Plate and the Caribbean Plate. One last example is the Central American Trench. It is formed by the South American Plate and the Caribbean Plate.

Convergent Boundries

When landmasses collide and then the crust crumbles and buckels into mountain ranges.Tthen as plates keep pushing volcanoes or earthquakes may go off. In the ocean they make trenches. One example is the himalayas. When the Indian Plate and the Eurasian Plate collided 55 million years ago. Another example is the Washington-Oregan Coastline. The Jaun de Fuca Oceanic Plate Subducts beneath the North American Plate. One last example is the Andes Mountain Range. It forms when the Oceanic Plate and the Continental Plate Collide.

Bibliography
 * //Divergent Boundaries //. //Plate Tectonics and Volcanos //. Web. 4 Nov. 2009. <[]>.
 * //Transform Boundary //. NASA. //Why isn't the earth perfect //. Web. 4 Nov. 2009. <[]>.
 * sharonyau1995, . //Convergent Boundaries //. 2009. //Flickr //. Web. 3 Nov. 2009. <[]>.
 * "National Geographic." //Plate Tectonics//. Web. 12 Nov. 2009. .
 * "Yahoo! news." //Giant Crack in Africa Will Create a New Ocean//. Web. 13 Nov. 2009. .
 * "Geology.com." //Transform Plate Boundaries//. Web. 17 Nov. 2009. .
 * <span style="color: #333333; font-family: times,helvetica; font-size: 16px; line-height: 18px;">"Geology.com." //Divergent Plate Boundaries// . Web. 17 Nov. 2009. <http://geology.com/nsta/divergent-plate-boundaries.shtml>.