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- 1. Multiple Choice
underwater mountain range
mid-ocean ridge
rift
seamount
abyssal plain
- 2. Multiple Choice
huge valley where the crust appears to be separating
rift
seamount
abyssal plain
atoll
- 3. Multiple Choice
level deep-ocean floor
abyssal plain
atoll
hadal zone
mid-ocean ridge
- 4. Multiple Choice
underwater mountain
seamount
abyssal plain
atoll
hadal zone
- 5. Multiple Choice
circular coral-reef island
atoll
hadal zone
mid-ocean ridge
rift
- 6. Fill in the Blank
What is the underwater mountain chain that stretches down the middle of the Atlantic Ocean?
- 7. Fill in the Blank
What are the deep depressions that contain the oceans?
- 8. Fill in the Blank
What is the gently sloped region that stretches away from the continental slope?
- 9. Fill in the Blank
What is the deepest known point in the sea?
- 10. Fill in the Blank
What is a pool of shallow, salty water that is often in the center of a circular coral-reef island?
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