| 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 Basin Floor | Begins where the slope ends, region made up of mouuntains, riges, 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 feet 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! |
| 75% | of water covers the earth! |
