plankton - any ocean organism that drifts/floats in ocean water - none can swim, phytoplankton - mostly microscopic plant-like plankton - like algae, zooplankton - mostly microscopic animal-like plankton - like krill, photosynthesis - the process phytoplankton use to make their own food, oxygen - phytoplankton release this as a waste during photosynthesis, filter feeders - animals that suck in water and push it out through a screen trapping plankton to eat, sunlight zone - phytoplankton mostly stay near in the ___ where there is sunlight, twilight zone - many zooplankton hide from predators in the ___ during the day, food chain - a simple diagram that shows how energy passes from one living thing to another as they eat , food web - a detailed diagram that show many connected food chains,

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