Aquarium

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Aquarium A tank for keeping live water plants
and animals.
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Aquatic environment A water environment.
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Algae Green-colored microscopic organisms in
aquarium water. Snails and scuds eat algae
for food.
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Freshwater environment A pond, lake, stream,
pool, or aquarium. The water is not salty
like the ocean.
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Elodea A common aquatic plant.
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Lemna (duckweed) An aquatic plant that floats on
the surface of the water.
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Ecosystem The interactions of the living and
nonliving components of an environment.
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Producer An organism that makes its own food.
Plants and algae are producers.
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Consumer An animal that eats other organisms.
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Decomposer An organism that eats dead plants and
animals.
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Food chain The path that food takes from one
organism to another. Arrows show where the food
goes in the chain.
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Food web A more complex food chain that shows
where there may be competition for
food resources.
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Competition When two or more animals eat the same
food.
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Resource Something, like food, that an organism
needs.
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Marine ecosystem An ocean or saltwater bay
environment.
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Plankton Microscopic aquatic organisms that drift
in the water. Some are plant-like and
others are animal-like.
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Phytoplankton Tiny plantlike organisms. They are
producers in freshwater and marine
ecosystems.
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Zooplankton Microscopic animals. They are
consumers in freshwater and marine ecosystems.