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Compared to ocean crust near deep-sea trenches crust near ocean ridges are?
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What are places where oceanic crust sinks back to the mantle?
No. Mid oceanic ridges are the places where new oceanic crust are forming.
How do ocean trenches help explain why crust added at ocean ridges doesn't make earth any larger?
Ocean trenches were discovered as a sign of destructive plate margins. These plate margins cause oceanic crust to subduct below the continental crust at the oceanic-continental boundary, and force the oceanic crust to move down into the Earth's mantle and melt into basaltic magma. As this is happening, magma at oceanic ridges is creating new oceanic crust at the mid-oceanic ridges. Overall, these two processes cancel each other out and so the total amount of oceanic crust is staying aproximately the same. Therefore the Earth is not growing. Hope this helps :)
What occurs along ocean trenches but not along mid ocean ridges that accounts for the occurrence's of deep focus earthquakes?
Subduction of oceanic crust. The Earthquakes occur at depth in the descending slab.
Are the oldest rocks of the oceanic crust found in deep ocean trenches far away from active mid-ocean ridges?
That is normally where they would be found; farthest away from the point at which they were initially formed.
Earth crust grows at mid ocean ridges why doesnt the earth grow larger?
At the opposite end of the convection current in the Earth's mantle that creates oceanic crust at the mid-ocean ridge, are trenches, where oceanic crust is diving down into the mantle. The Atlantic Ocean is expanding. The Pacific Ocean is shrinking.
How do you contrast mid-ocean ridges and trenches?
Mid-ocean ridges are the birthplace of oceanic crust. Trenches represent the destruction and burial of oceanic crust. They are at opposite ends of the Earth's convection currents that move through the asthenosphere.
Does theory continental drift state that new ocean crust is formed at ocean ridges and destroyed at deep sea trenches?
No, the theory is that Seafloor spreading state that the new ocean crust is formed at ocean ridges and is destroyed at deep sea trenches.
Crust under the ocean is called?
Crust under the oceans is called oceanic crust.
How do ocean ridges and deep-sea trenches support the theory of sea floor spreading?
Sea Floor spreading has to do with the crust forming at ocean ridges and being destroyed at deep sea trenches.
What physical feature occures along ocean trenches and ridges?
Magmatic upsurge from within the earths crust, and plumes.
Does the theory of continental drift state that ocean crust is formed at ocean ridges and destroyed at deep sea trenches?
Yes
What are places where oceanic crust sinks back to the mantle?
No. Mid oceanic ridges are the places where new oceanic crust are forming.
How do ocean trenches help explain why crust added at ocean ridges doesn't make earth any larger?
Ocean trenches were discovered as a sign of destructive plate margins. These plate margins cause oceanic crust to subduct below the continental crust at the oceanic-continental boundary, and force the oceanic crust to move down into the Earth's mantle and melt into basaltic magma. As this is happening, magma at oceanic ridges is creating new oceanic crust at the mid-oceanic ridges. Overall, these two processes cancel each other out and so the total amount of oceanic crust is staying aproximately the same. Therefore the Earth is not growing. Hope this helps :)
Isochron maps indicate what about the seafloor of the ocean crust?
Well i think that can be one of those a) oldest near ocean ridges b) Youngest hear ocean ridges c) Youngest at deep-sea trenches d) Thinnest in subduction zones
Where are the youngest portion of Earth's crust found?
The youngest parts of the Earth's crust are found in the oceanic crust. This crust is continuously being created at the mid-oceanic ridges.
Is the oceanic crust near a mid-ocean ridge is older than crust far away?
Sorry, you have it entirely reversed.
What is the definition for ocean trenches?
Trenches are the lowest points on the crust of the Earth, created by the subduction of oceanic crust beneath less dense crust.
