| A | B |
|---|
| abyssal plain definition | Smooth, nearly flat region on the ocean floor |
| continental shelf definition | Gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent |
| trench definition | A deep, steep sided canyon in the ocean floor |
| sonar definition | A device that determines the distance of an object underwater by recording the echoes of sound waves |
| continental slope definition | A steep incline of the ocean floor leading down from the edge of a continental shelf |
| continental slope (location) | feature at A,  |
| continental shelf (location) | feature at B,  |
| abyssal plain (location) | feature at C,  |
| trench (location) | feature at D,  |
| seamount (location) | feature at E,  |
| volcanic island (location) | feature at F,  |
| mid-ocean ridge definition | a range of mountains that wind through the ocean |
| mid-ocean ridge (location) | feature at G,  |
