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Energy & Matter Flow

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Term
Definition
Food chain   the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms  
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Food web   a diagram that shows the complex feeding relationships between organisms in an ecosystem  
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Trophic levels   one of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers  
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biomass   total dry mass of all organisms in a given area  
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Energy pyramid   a triangular diagram that shows an ecosystem's loss of energy, which results as energy passes through the ecosystem's food chain  
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Producer   an organism that can make organic molecules from inorganic molecules through photosynthesis or chemosynthesis  
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Primary consumer   an organism that is usually a herbivore, feeding on plants or other photosynthetic/chemosynthetic organisms  
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Secondary consumer   an organism that is a carnivore, specifically feeding on herbivores  
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Tertiary consumer   an organism that is on the top of the food chain, feeding on other carnivores  
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Omnivore   an organism that eats both plants and animals  
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Carnivore   an organism that eats animals  
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Herbivore   an organism that eats only plants  
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