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FOOD CHAINS STUDY GUIDE A food chain is a diagram that shows how food energy moves from one organism to another in a given environment. Food energy moves along the food chain when one organism eats another. What is a food chain? What is at the beginning of all food chains? The sun is at the beginning of all food chains. What is a predator? A predator is an animals that preys on other animals for food only. What is prey? Prey are the animals that a predator eats. What is an omnivore? An omnivore eats both plants and animals. What is a carnivore? A carnivore eats meats. What is a herbivore? A herbivore eats only plants. Could food chains continue without one component? Food chains could not continue without all of the components because they all rely on each other. With one missing part, the chain is no longer complete and will not function. What is a community? A community is different populations in a certain area that interact with each other in some direct or indirect way. What is a population? A population is a group of organisms that are the same species living together in a certain area. What happens when too many of one powerful species are in one ecosystem? The smaller, less powerful species in that ecosystem would decrease in number. How can an ecosystem be self-sustaining? An ecosystem can be self-sustaining with all parts of the food chain. The sun will make the plants grow, the herbivores and omnivores will eat the plants, and the carnivores will eat the herbivores and omnivores and the process will continue. What are the nonliving parts of an ecosystem? What is a food web? The nonliving components are air, water, soil, and the sun. A food web is many food chains linked together. What are the living items in our terrariums? The living items are the grass, anoles, crickets, and the worms. What is a producer? A producer is an organism that makes its own food (energy). It is at the beginning of the food chain. What is a consumer? A consumer is an organism that feeds on other plants and animals since it DOES NOT make its own food (energy).