wind beneath earths oceans.

the removal of rock particles by wind,water,ice,or gravity.

continually adds new material to the sea floor.

type of weathering in which rock is physically broken into smaller pieces.

the process by which ocean floor sinks beneath a deep ocean trench and back into mantle.

wedges of ice in rocks widen deepen cracks.

state that pieces of earths litosphere arm in slow constant motion driven by convection currents in the mantle.

the grinding away of rock by rock particles carried by water,ice,wind,or gravity.

the surface where two plates move apart or diverge.

the process that breaks down rock and other substances at earths surface.