EVERYDAY SCIENCE

Detailed explanation-1: -This place where the denser plate subducts is called a subduction zone. Oceanic subduction zones almost always feature a small hill preceding the ocean trench itself. This hill, called the outer trench swell, marks the region where the subducting plate begins to buckle and fall beneath the more buoyant plate.

Detailed explanation-2: -Trenches are formed by subduction, a geophysical process in which two or more of Earth’s tectonic plates converge and the older, denser plate is pushed beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust (the lithosphere) to bend and form a steep, V-shaped depression.

Detailed explanation-3: -Answer and Explanation: In ocean trenches one tectonic plate sinks underneath another, called a subduction zone at convergent boundaries. If an oceanic and continental plate come together, the oceanic plate will be the one to sink, as these plates are always more dense.

Detailed explanation-4: -Deep-sea trenches generally lie seaward of and parallel to adjacent island arcs or mountain ranges of the continental margins. They are closely associated with and found in subduction zones-that is, locations where a lithospheric plate bearing oceanic crust slides down into the upper mantle under the force of gravity.

Detailed explanation-5: -Subduction zones are where the cold oceanic lithosphere sinks back into the mantle and is recycled. They are found at convergent plate boundaries, where the oceanic lithosphere of one plate converges with the less dense lithosphere of another plate.