Abeka 8th Science Quiz 17 L79

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

• continental rise
• oceanic trench
• continental shelf
• abyssal plain

What is the underwater mountain chain that stretches down the middle of the Atlantic Ocean?

• Mid-Atlantic Ridge
• Atlantic Ocean Ridge
• Caribbean Trench
• Pacific Ridge

What is the deepest known point in the sea?

• Mariana Trench
• Puerto Rico Trench
• Java Trench
• Challenger Deep

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

• ocean
• lagoon
• bay
• estuary

What are the deep depressions that contain the oceans?

• Coastal plains
• Ocean basins
• Ocean cliffs
• Sea trenches

A ________ is an underwater mountain.

• trench
• plateau
• island
• seamount

The ________ is an underwater mountain range.

• continental shelf
• ocean trench
• seamount
• mid-ocean ridge

The ________ is a level deep-ocean floor.

• continental shelf
• ocean trench
• seamount
• abyssal plain

A huge valley where the crust appears to be separating is called a ________.

• plateau
• rift

• canyon
• mountain range

A circular coral-reef island is called ________.

• atoll
• island
• cay
• reef