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Where does the sunlit zone change to the twilight zone in the ocean?

User Marwin
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Final answer:

The sunlit zone changes to the twilight zone at a depth of approximately 200 meters in the ocean.

Step-by-step explanation:

The sunlit zone changes to the twilight zone in the ocean at a depth of approximately 200 meters. This depth marks the end of the photic zone, where light can penetrate, and the beginning of the aphotic zone, where light cannot penetrate. In the aphotic zone, there is not enough sunlight for photosynthesis to occur, so organisms rely on other sources of energy, such as chemosynthesis or organic matter falling from the surface.

User Nik FP
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The top zone is the euphotic or sunlit zone. This is the ocean zone that sunlight penetrates. Because this zone gets sunlight, photosynthesis can occur and plants can grow here. The sunlit zone goes down to about 660 feet.