Science Flashcards: Organisms & Environments

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Organism

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A living thing

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Compete

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When two organisms need the same, limited resource in order to survive

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Ecosystem

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The system of interactions between living things and the environment

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Decomposer

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Any organism that breaks down dead plants and animals to cycle nutrients through the environment

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Consumer

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Any organism that cannot make its own food and depends on eating other organisms for its energy needs

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Food web

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A visual model that shows how energy is transferred from one organism to another; contains overlapping food chains

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Producer

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An organism that performs photosynthesis to create its own food; often consumed for food by other organisms

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Biotic

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Parts of an ecosystem that are, or once were, alive

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Abiotic

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Parts of an ecosystem that are not, and were never, alive

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Fossil

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Preserved evidence from millions of years ago that shows the types of living things and their environment at that time