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Seventh Grade Science - Needs & Characteristics Vocab

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Term
Definition
Stimulus   A change in an organism's environment that it reacts to. Examples: Light, darkness, gravity, heat, cold  
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Response   An organism's response to a stimulus.  
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Grow   To get larger in size.  
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Develop   To change in form or become more complex.  
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Homeostasis   Maintaining a stable internal environment.  
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Biotic Factor   Anything in an ecosystem that is living or once was alive.  
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Abiotic Factor   The nonliving parts of an ecosystem.  
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Habitat   The environment an organism lives in.  
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Organism   A living thing.  
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Species   A group of organisms that look alike and can reproduce.  
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Population   All of a single species in an area.  
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Community   All of the biotic factors in an area. Its made up of populations.  
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Ecosystem   All of the living and non-living things in an area.  
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