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Convergent plate boundary is when a plate collides with or dives under another. The crust crumples and buckles into mountain ranges. Plates in the ocean dives in a process called subduction. When plates collide they form trenches that can also lead to underwater valcanoes, that build into islands. Some examples of convergent plate boundary's are when the India plate and the Asia plate crashed, 55 million years ago giving rise to the Himalayas. The Arcs like Japan formed when the Philippine plate and the Pacific plate collided. Another example is the Mariana Trench in the North Pacific Ocean. It was formed by the Phlippine plate connecting with the Eurasian plate.

Divergent plate boundary is when plates separate and magma from deep in the earths mantle rises toward the surface. The magma pushes apart 2 or more plates. Mountains and Valcanoes rise along the seam. The Process renews the ocean floor and widens the giant basins. A single mid-ocean ridge system connects the world's oceans making the longest mountain range in the world. Some examples of Divergent boundary's are the Great Rift Valley in Africa form where the African plate and the Somali plates are tugged apart. The red sea was made from the South American plate and the African plate diverging. Another example is the Gakkle ridge which was formed by the North American plate and the Eurasian plate.

Tranform boundary's are when plates grind against eachother.80 percent of the planets earthquakes occur along the rim of the pacific ocean, "Ring of Fire" The San Andreas Fault in California is an example of transform boundries. Transform boundries is when plates grind past each other.These Boundries do not create oceans or mountains but they often cause, like the one in San Fransico in 1906. The San Andreas fault in California is an example. The Atlantic and Pacific plates are colliding to form the fault.

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