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Chapter 18 Review
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Organisms are divided into three groups, based on how they get energy: Producers Consumers Decomposers
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____________ are organisms that eat other organisms Answer: consumers
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Producer Producer makes its own food
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There are three main types of consumers: Herbivores Carnivores Omnivores
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An ________________ eats only plants herbivore
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An __________________ eats both plants and animals. omnivore
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A _________________ is a consumer that eats only animals. Answer: carnivore
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A _________________ is an omnivore that eats remains of dead organisms. Answer: scavenger
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Organisms that get energy by breaking down the remains of dead organisms are ______________ Answer: decomposers
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Predator and Prey Predator: Organism that kills and eats another organism Prey: Organism that is killed and eaten by another organism
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symbiosis Relationship in which 2 organisms live in close association with each other
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Competition 2 or more species trying to use the same resources
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Mutualism Relationship between two species where both benefit Bee: gets nectar from flower ☺ Flower: Bee spreads pollen ☺
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Biotic and Abiotic Biotic: Living factors in the environment Abiotic: Nonliving factors in the environment
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A _________________ shows how energy in food flows from one organism to another Answer: food chain
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A ________________ is a diagram of overlapping food chains Answer: food web
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Biosphere The part of the earth where life exists
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Ecology Study of interactions of living things and their environments
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This food pyramid shows that there is little energy at the top Food Pyramid
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Defensive Chemicals Chemicals used as defense by prey Poison Ivy
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