8th Quiz 17

TRENCHES are underwater fissures usually caused by turbidity currents.

Underwater mountain range

any area of the sea that exceeds six thousand meters in depth

What is a pool of shallow, salty water that is often in the center of a circular coral-reef island?

Which one is correct?

ICELAND is made from the mid-Atlantic ridge.

The abyssal plain is usually FLATTER than plains on the continents.

What is the gently sloped region that stretches away from the continental slope?

What are the deep depressions that contain the oceans?

huge valley where the crust appears to be separating

Which of these is not part of the continental margin?

Level deep-ocean floor is known as the ABYSSAL PLAIN.

circular coral-reef island

Underwater mountain

The Mariana Trench is located in the ATLANTIC OCEAN.

The mountain chain down the center of the Atlantic Ocean is called the MID-OCEAN RIDGE.

The deepest known point in the sea is the CHALLENGER DEEP.