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Ocean Trenches

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1What is an ocean trench?A narrow depression in the earths crust
2Where do ocean trenches form at?Destructive plate boundaries
3Because the oceanic trench is dense, what does this mean?It means that the oceanic plate sinks
4When the plate sinks, what do we get?A subduction zone, which then causes the plate to melt
5How are they formed?One wall is formed by the continental plate and the other wall is formed by the oceanic plate
6What is one example of an Ocean trench?The Mariana's Trench - 36,000 feet below sea level
7Because the continental plate is less dense than the oceanic plate, what does this mean?The continental plate floats on top of the mantle
8What occurs at the continental plate?When molten rock is pushed to the surface, we find volanic arcs.
9What makes up the trench?The subduction zone
10How is one wall formed?By the subducted Oceanic plate
11How is the other wall formed?By the overriding continental plate

Descripción: Fichas sobre Ocean Trenches, creado por alicerichardson1 el 01/12/2014.
Creado por: alicerichardson1
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