Ocean Zones Review

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What is the Sunlight Zone?

Back

The Sunlight Zone is the uppermost layer of the ocean, where sunlight penetrates, allowing photosynthesis to occur. It typically extends to about 200 meters deep.

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What characterizes the Twilight Zone?

Back

The Twilight Zone, also known as the Dysphotic Zone, is the layer of the ocean where light begins to fade. It extends from about 200 meters to 1000 meters deep.

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What is the Midnight Zone?

Back

The Midnight Zone, or Aphotic Zone, is the part of the ocean that is completely dark and extends from about 1000 meters to the ocean floor.

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Define the Intertidal Zone.

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The Intertidal Zone is the area where the land and sea meet, experiencing varying levels of water due to tides, and is home to unique ecosystems.

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What is the Photic Zone?

Back

The Photic Zone is the layer of the ocean where there is enough light for photosynthesis, typically extending to about 200 meters deep.

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What is the Neritic Zone?

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The Neritic Zone is the part of the ocean that is near the coast and extends from the low tide mark to the edge of the continental shelf, where most commercial fishing occurs.

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What is the Aphotic Zone?

Back

The Aphotic Zone is the part of the ocean that receives no sunlight, making it impossible for photosynthesis to occur.

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What percentage of visible light penetrates the Photic Zone?

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99% of all visible light penetrates the Photic Zone.

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What is the main characteristic of the Neritic Zone?

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The Neritic Zone is characterized by shallow waters that are rich in nutrients and support a diverse range of marine life.

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What is the significance of the photic zone for marine life?

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The photic zone is crucial for marine life as it supports the growth of phytoplankton, which forms the base of the oceanic food web.