Volcanic mountains not formed on the mid-ocean ridge

A narrow trench in the center of the highest part of the mid-ocean ridge

Underwater volcanic activity that adds mountains to either side of the mid-ocean ridge

Steep-sided canyons with narrow valleys in the deepest part of the ocean

Flat or gently sloping, smooth area of the ocean floor

The mid-ocean ridge is most similar to a _______ on land

Underwater volcanic activity that adds mountains to either side of the mid-ocean ridge

A nickname for the rift zone is the '_______ zone.'

The deepest trench on Earth is called the ________ trench.

The abyssal plain begins where the ______ ends.