| A | B |
|---|
| Continental Margin | Region of the seafloor that contains the shelf and slope |
| Continental Shelf | part of the continet that is underwater |
| Continental Slope | where the water deepens abruptly and the edge of the continental land mass drops |
| 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 smoth areas on floor |
| Trenches | crachs on the earths crust, deepest part os 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 te sea floor |
| Mid-Ocean ridge | great undersea mountain ranges characterized by frequent Eartquakes and Volcanoes |
| Island | seamount that rises above the surface of the water |
| Amount of Water Covering the Earth | 75% |
