| A | B |
|---|
| Continental Margin | region of the sea floor that contains 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 BASIN FLOOR | begins where the slop ends, region made up of mountains, ridges, trenches, valleys, rifts, guyots, abyssal plains, and canyons plateau |
| Abyssal Plain | vast smooth areas on floor |
| TRENCHES | cracks on the earth’s crust, deepest 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 tha rises above the surface of the water |
| earth's percentage of water | 75% |
