Ocean Trenches Flashcards
What do ocean trenches mark?
Where one plate begins to descend beneath the other at the seaward edge of destructive plate margins.
Where at ocean trenches found?
At two types of destructive plate boundaries.
Oceanic and continental.
Oceanic and oceanic.
What makes the ocean trench?
The subducting of the denser oceanic plate forms a very deep part of the ocean known as a trench.
What is the deepest ocean trench in the world?
The Mariana Trench.
How deep is the Mariana Trench?
11,033 metres deep.
What is the pressure like in the Mariana Trench?
The pressure is over 8 tonnes per square inch.
Where is the Mariana Trench?
Western Pacific Ocean.
Near Indonesia.
The Mariana Trench is deeper than what?
How high Everest is.
What is a negative about ocean trenches?
They are inaccessible to humans.
What is continental shelf?
A shallow zone less than 20 metres off the coast at the edge of a continent that lies under the sea.
Why do we use continental shelf?
For fishing and drilling for oil and gas.
Fold mountain and ocean trenches are formed by what?
Plates moving together.
What happens when a destructive plate boundary moves?
Both land forms occur together.
Fold mountains and ocean trenches.
