| A | B |
|---|
| Continental Margin | Region of the sea floor that contains the self and slope |
| Continental Shelf | Part of continent that is underwater |
| Continental Slope | where water deepens abruptly and the edge of the continental land mass drops off |
| 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 that rises above the surface of the water |
| 75% of the earth’s surface is covered with what? | water |
