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Photosynthesis, Cellular Respiration & Fossil Fuels

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Producer   An organism that can make its own food.  
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Consumer   An organism that obtains energy by feeding on other organisms.  
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Decomposer   An organism that breaks down wastes and dead organisms.  
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Fossil Fuels   An energy-rich substance (such as coil, oil, or natural gas) formed from the remains of organisms.  
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Fossil   The remains or imprint of marine life embedded or preserved in rock layers deep in the earth.  
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Sediment   Particles of rock and sand.  
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Food Web   The pattern of overlapping food chains in an ecosystem.  
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Competition   The struggle between organisms for the limited resources in a habitat.  
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Predation   An interaction in which one organism kills and eats another.  
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Symbiosis   A close relationship between species that benefits at least one of the species.  
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Parasitism   A relationship in which one organism lives on or inside another and harms it.  
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Mutualism   A relationship between two species in which both species benefit.  
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Commensalism   A relationship between two species in which one species benefits and the other is neither helped nor harmed.  
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