Define: continent, continental shelf, continent shelf, continent slope, seamount, trench midocean ridge subduction ridge, subduction zone, adbasal plain, oceanic crust, submarine canyon.

Continent-any of the world's main continuous expanses of land

Continental Shelf-the area of seabed around a large landmass where the sea is relatively shallow compared with the open ocean. The continental shelf is geologically part of the continental crust

continent slope-the slope between the outer edge of the continental shelf and the deep ocean floor

seamount-a submarine mountain

trench-a long, narrow, deep depression in the ocean floor, typically one running parallel to a plate boundary and marking a subduction zone

midocean ridge-a long, seismically active submarine ridge system situated in the middle of an ocean basin and marking the site of the upwelling of magma associated with seafloor spreading

subduction zone-A subduction zone is the biggest crash scene on Earth. These boundaries mark the collision between two of the planet's tectonic plates. The plates are pieces of crust that slowly move across the planet's surface over millions of years

abyssal plain-An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 meters (9,800 ft) and 6,000 meters (20,000 ft). Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth's surface

oceanic crust-the relatively thin part of the earth's crust which underlies the ocean basins. It is geologically young compared with the continental crust and consists of basaltic rock overlain by sediments

submarine canyon-A submarine canyon is a steep-sided valley cut into the seabed of the continental slope, sometimes extending well onto the continental shelf, having nearly vertical walls, and occasionally having canyon wall heights of up to 5 km

Not all of them were is my textbook sorry