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Ecosystems Lesson 3

Science a Closer Look Chapter 3 Lesson 3

TermDefinition
producers organisms that make their own food using the energy in sunlight (green plants, grasses, trees)
consumers organisms who cannot make their own food
decomposers organisms that break down wastes and the remains of other organisms into simpler substances (worms, bacteria, fungi)
herbivores consumers that eats only producers (porcupines, rabbits, deer)
omnivores consumers that eat producers and consumers (opossums, raccoons, bears)
carnivores animals that eat herbivores and omnivores (ospreys, cats, tigers, lines, sharks)
food chain the path that energy takes from one organism to another in the form of food
food web the food chains that overlap in an ecosystem, shows how all the food chains in an ecosystem are connected
predator carnivore that hunts for food
prey organisms that are hunted by predators
competition the struggle among living things for food, water, or other resources
energy pyramid a diagram that shows the amount of energy available at each level of a food web in an ecosystem
Created by: mtrent88