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Vocabulary Words & Definitions

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Term
Definition
Ecology   Study of interactions of living organisms with one another and their environment.  
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Biotic   Describes the living factors in the environment.  
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Abiotic   Describes the nonliving part of the environment.  
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5 Levels of Environmental Organization   Organism, population, community, ecosystem, biosphere.  
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Organism   A living thing.  
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Population   A group of organisms of the same species that live in a specific geographical area.  
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Community   All the populations of species that live in the same habitat interact with each other.  
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Ecosystem   A community of of organisms and their abiotic enviorment.  
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Biosphere   Part of Earth where life exists.  
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Producer   An organism that makes its own food from its surroundings.  
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Consumer   An organism that eats other organisms or organic matter.  
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Herbivore   An organism that eats plants.  
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Carnivore   An organism that eats animals.  
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Omnivore   An organism that eats both plants and animals.  
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Scavenger   An omnivore that eats dead plants and animals.  
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Decomposer   An organism that gets energy by breaking down the remains of dead organisms, organic wastes, and consuming or absorbing the nutrients.  
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Food Web   A diagram that shows the feeding relationships between organisms in a web.  
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Food Chain   Pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms  
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Limiting Factor   A resource so scarce, it limits the population size.  
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Carrying Capacity   The largest population that an environment can support at any given time.  
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Predator   An organism that kills and eats other organisms.  
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Prey   An organism that is killed and eaten by other organisms.  
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Predator Adaptations   Adaptations that help catch prey.  
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Prey Adaptations   Adaptations that help avoid predators.  
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Symbiosis   The organisms that live in close association with each other.  
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Mutalism   A relationship where both organisms benefit.  
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Commensalim   A relationship between two organisms in which one organism benefits, while the other is unaffected.  
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Parasitism   A relationship there the parasite benefits, and the host is harmed.  
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