Where on the seafloor do you find the longest trench?
Mariana Trench ; see related link below .
The Mariana Trench is the deepest trench in any of the world's oceans. It's in the western Pacific, east of the Mariana Islands (south of Japan and north of Papua New Guinea). The trench is located on a convergent (coming together) plate boundary where subduction is occurring (one plate is being pushed underneath the other). Trenches are a common occurrence at convergent land-sea plate boundaries. the Mariana trench is the longest trench in the world…
The world's longest mountain system is known as Ocean Ridge, which is a chain of mountains that runs on the seafloor of five oceans around the world, the total length of the system is 49,700 miles. The Andes is the world's longest mountain system on the surface of a continent; it is 4,300 miles in length.
The hot materials like magma goes up and the cool materials like water goes down . As all magma cools, it became land because it was cooled by water but other magma goes down on and goes back to the flow. The way of the magma goes bigger and water comes in (what we called trench) and causes the seafloor spreading.
Soldiers who were new to the trenches of World War I quickly learned their way around the trench system. All of the trenches were dug with a main trench against the front line and several support trenches behind that. The formulaic nature of trench construction made it fairly easy for soldiers to find their way around.
You can find the seafloor spreading in the middle of the Atlantic Ocean. It is pushing Europe and Africa away from North and South America. You can go to Iceland and stand on the place where the spreading seafloor comes onto land. There, you can put one foot on Europe and one foot on America. It would be quite a while before your feet became another inch apart.
Seafloor spreading is the process by which new oceanic crust is created, while simultaneously causing continental drift by pushing tectonic plates outward from the mid-ocean ridges where the new crust is being created. The mid-ocean ridges where seafloor spreading takes place is the longest mountain range in the world.