The plates move apart, which is called a divergent boundary.
Oceanic trenches are the gaps which form when the tectonic plates move apart. They are the very deepest parts of the ocean.
The answer is Tectonic Plates
divergent
tectonic plates
Long crack that forms as two tectonic plates move apart
A mid-ocean ridge is formed when two tectonic plates move away from each other and the opening left by them separating fills in with magma.
Because as tectonic plates move away from each other, the ocean floor spreads apart and fills the gap.
On continents it is called a Rift Valley or Graben. in the ocean it is call a Mid Oceanic Ridge.
the ocean plates move because of the movement of the the tectonic plates beneath the ocean and do to the motion of the oceans currents.
A mid-ocean ridge is formed when two tectonic plates move away from each other and the opening left by them separating fills in with magma.
Young, because it is being continually formed as the adjoining tectonic plates move apart.
Plates of the earth's crust are moving away from each other, forming an extensive system of fractures and faults.
No. When tectonic plates move away from each other they can cause an ocean to spread.
Oceanic trenches are the gaps which form when the tectonic plates move apart. They are the very deepest parts of the ocean.
A "mid oceanic ridge" A "rift valley" or "graben" A "Constructive Plate Boundary" An "Ocean"
I'm sure it convection,slabpull,and ridge pull ~*
I'm sure it convection,slabpull,and ridge pull ~*