Ecosystems - A system of living and nonliving things in a particular area or environment., Producer - A living thing that produces its own food., Consumer - A living thing that eats other living things., Decomposer - A group of living things that break down dead things., Food Chain - A simple diagram to show how energy moves from one living thing to another., Food Web - A model that shows us how matter cycles and energy flows in an ecosystem through the intertwining of food chains.,

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