Ecology and Environmental Science

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photosynthesis

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a process by which plants produce food in the form of carbohydrates using energy from the sun and materials from the soil and air

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producer

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an organism that makes its own food using chlorophyll

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consumer

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an organism that eats other organisms to obtain energy

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herbivore

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an animal that eats only plant or plant materials

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carnivore

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an animal that eats only other animals

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omnivore

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an animal that eats both plants and other animals

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decomposer

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a living thing that feeds on dead materials, breaking them down and returning materials to the environment

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food chain

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the arrangement of living things in an order in which each uses the next as a source of food

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food web

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a combination of all the food chains in an ecosystem

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energy pyramid

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a diagram to show how the amount of food energy available changes at each step of the food chain