| A | B |
|---|
| Continental Margin | region of the sea floor that contains the shelf and slope |
| Continental Shelf | Part of the continent that is underwater |
| Continental Slope | where water deepens abruptly and the edge of the continental land mass drops off |
| Ocean Bason Floor | Begins where the slope ends, regions made up of mountains, ridges, treches, valleys, rifts, guyots, abyssal plains, and canyons plateau |
| Abyssal Plain | vast smooth areas on floor |
| Trenches | cracks on the earth's crust, deppest part of the oceans |
| Guyots | Flat topped volcanic mountains |
| Rift | A valley that runs along the center of a ridge |
| Seamount | Isolated mountain that rises more than 3000 ft. above the sea floor |
| Mid-Ocean Ridge | Great undersea mountain ranges characterized by frequent earthquakes and volcanoes |
| Island | Seamount that rises above the surface of the water |
| Water Coverage | 75% of the earths surface is covered with water |
