| A | B |
|---|
| continental shelf | Part of the ocean that begins at the shoreline and gently slopes underwater |
| continental slope | A steep slope begins at the continental shelf and plunges down two miles |
| continental rise | A gently sloping area that connects the continental slpe to the bottom of the ocean floor |
| abyssal plain | A flat area of the ocean floor covered with sand, mud, and plant and animal remains |
| seamount | A huge underwater volcanic cone |
| guyot | A flat-topped seamount |
| ocean trench | A narrow v-shaped valley on the ocean floor |
| Marianas Trench | The deepest canyon on Earth found in the Pacific Ocean |
| mid-ocean ridge | A chain of mountains on the ocean floor |
