Which term describes the open-ocean environment beyond the continental shelf?

Prepare for the IB Marine Science SL Exam. Use flashcards and multiple-choice questions with detailed explanations. Master marine ecosystems, ocean currents, and biological resources for success!

Multiple Choice

Which term describes the open-ocean environment beyond the continental shelf?

Explanation:
Open-ocean waters beyond the edge of the continental shelf are described as the oceanic zone. The continental shelf marks the boundary before deeper waters; beyond about 200 meters depth you enter the oceanic zone, which covers the open, deep ocean away from the coast. The term pelagic refers to the water column in open sea in general and isn’t as precise about location relative to the shelf, while nutrients and primary producers are substances or organisms, not environments. So the oceanic zone is the correct description for that open-ocean region beyond the shelf.

Open-ocean waters beyond the edge of the continental shelf are described as the oceanic zone. The continental shelf marks the boundary before deeper waters; beyond about 200 meters depth you enter the oceanic zone, which covers the open, deep ocean away from the coast. The term pelagic refers to the water column in open sea in general and isn’t as precise about location relative to the shelf, while nutrients and primary producers are substances or organisms, not environments. So the oceanic zone is the correct description for that open-ocean region beyond the shelf.

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