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Science 9 probe
Chapter 2 - set 1
8
Science
9th Grade
01/06/2011

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Term
Biosphere
Definition
the total area of Earth where living things are found; the narrow zone around Earth that supports life
Term
Biotic factor
Definition
any of the living components of an ecosystem; such factors include organisms like bacteria, plants, and animals, as well as the interactions between them
Term
Carnivore
Definition
an organism (consumer) that eats other animals (consumers)
Term
Commensalism
Definition
a symbiotic interaction in which one organism benefits while the other is unaffected
Term
Community
Definition
all of the different populations in a particular area that interact with one another; the third level of organization that ecologists study
Term
Consumer
Definition
an organism that consumes other organisms or biotic waste in order to survive; also called a heterotroph
Term
Decomposer
Definition
a consumer that breaks down the complex molecules found in dead organisms and waste matter into simpler molecules
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