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Ecosystems Week 1

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Term
Definition
Ecosystem   A community and the abiotic parts of its environment  
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Autotroph   Any organism that can create its own food from inorganic materials  
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Heterotroph   An organism that cannot create its own energy and must instead rely on consuming nutrients from other organisms  
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Producers   An organism that makes its own food  
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Primary Consumers   Organisms that eat plants  
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Secondary Consumers   Organisms that eat the primary consumers and or may eat plants  
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Decomposers   A type of consumer that gets its food by breaking down animal wastes and remains of dead plants and animals  
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Herbivores   An animal that consumes only plants  
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Carnivores   An animal that eats only other animals  
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Omnivores   An animal that eats plants as well as other animals  
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Population   Organisms of the same species living together in the same environment  
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Community   The populations living in the same environment at the same time  
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Population Density   Is a measure of how many organisms live in that area  
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Limiting Factor   An environmental factor that causes a population to decrease  
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Food Chain   A model that shows one set of feeding relationships among living things  
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Food Web   A model that shows many different feeding relationships among living things  
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Predator   An animal that feeds on other living animals  
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Prey   The animals predators eat  
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Organism   Any individual living thing  
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Succession   An ecological change  
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Energy Pyramid   A model that shows the available amount of energy in each trophic layer in an ecosystem  
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Competition   It is what animals do to survive, they fight for their food  
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Mutualism   The symbiotic relationship that benefits both organisms involved  
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Symbiosis   Interaction between two organisms in close physical association  
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Coexistence   To live at the same time  
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Cooperation   To work together to do something  
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Succession Primary   Regions in which soil is in capable of sustaining life  
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Succession Secondary   Areas where communities previously existed been removed  
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Taiga   A biome where winters are very cold and long and the dominant plants are conifers  
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Tundra   Extremely cold climate located near the North and South Poles and on the tops of mountains; receives very little precipitation and has no trees  
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Deciduous Forest   A biome in which the dominant plants are broad-leaved trees that shed their leaves each fall  
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Grasslands   A biome where the dominant plants are grasses  
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Tropical Rain Forests   A forest that is humid and rainy for much of a year  
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Deserts   An area that gets little precipitation and has very little vegetation  
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Ocean   A large body of salt water that covers most of Earth  
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Created by: Adrienne7412
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