Subduction zones. Subduction zones form when a continental plate is colliding with an oceanic plate. Subduction zones also form when two oceanic plates collide. The continental crust is lighter because of the quartz and feldspar minerals in granite.Iron and magnesium are much heavier minerals found in ocean floor basalt. When the two plates meet the oceanic crustal plate always subducts beneath the continental plate.The subducting oceanic plate bends and plunges beneath the lighter continental plate until it melts. When two oceanic plates meet and form a subduction zone the heavier and denser of two oceanic plates subducts.ubduction zones also form when two oceanic plates collide. The continental crust is lighter because of the quartz and feldspar minerals in granite. Iron and magnesium are much heavier minerals found in ocean floor basalt. When the two plates meet the oceanic crustal plate always subducts beneath the continental plate.
A HealthCorps answered. A few things happen to enable our ears to hear: 1  Sound waves enter your ear canal and cause your eardrum to vibrate.  Vibrations cause the fluid in the cochlea to move, stimulating the receptor cells.
Hearing Intensity is measured in decibels. Hearing Eardrum Piece of skin stretched tightly over the entrance to the rest of the ear. It vibrates and causes a small bone in the ear to vibrate. Cochlea Snail-shaped part of the ear filled with fluid and small hairs that vibrate to incoming sound.