A deep valley with very steep sides They are often carved from the Earth by a river
On the bottom of the ocean, there is a central ridge, or mountain range, that divides the ocean floor into two parts.
The part of the continent located under the water
There are many steep - sided canyons and deep, narrow valleys in the bottom of the ocean. The deepest part of the ocean basin and are deeper than any valley found on land.
An opening in earth’s surface from which lava flows
A flat region of low land Occurs at the bottom of valleys
A low area between higher areas such as mountains
Begins where the continental slope flattens Smooth part of the ocean floor Covers over half of the surface of the earth
A mountain with a flat top
In the center of the highest part of the mid-ocean ridge is a narrow trench Underwater volcanic activity that adds mountains to either side of the mid-ocean ridge occurs here
A place on earth’s surface where the land is much higher than the land that surrounds it
The steep slope where the land drops to the bottom of the ocean floor This is where the ocean gets much deeper
