| A | B |
|---|
| Contiinental Margin | Region of seafloor that contains the shelf and slope |
| Continental Shelf | Part of continent that is underwater |
| Continental Slope | Where water deepens abrubtly and the edge of the continental land mass drops off |
| Ocean Basin Floor | Begins where the slope ends, regionmade up of mountains, ridgees, trenches, valleys, rifts, guyots, abyssal plains, and canyons platue |
| Abyssal Plain | Vast smooth areas on floor |
| Trenches | Cracks on Earth's crust, deepest part of the oceans |
| Guyots | Flat topped volcano mountains |
| Rift | A valley thatruns 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 volcanos |
| Island | Seamount that rises above the surface of water |
| How much of the earth's surface is covered by water | 75% of the earht's suface is covered by water |
