Lesson 6.3 Worksheets Aquatic Biomes - 6 Aquatic Ecosystems Key ... - Free Printable

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- Salinity: The amount of salt dissolved in water. I remember this by thinking of the ocean tasting salty.
- Photic zone: The upper layer of water where sunlight can penetrate, allowing photosynthesis to occur. I remember "photic" sounds like "photo," which relates to light.
- Aphotic zone: The layer below the photic zone where no sunlight penetrates and photosynthesis cannot occur. I know the prefix a– can mean "without," so aphotic must mean "without light."
- Benthic zone: The bottom layer of a body of water, including the sediment surface and some sub-surface layers. I remember "benthic" sounds like "bottom."

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