1) a non living part of an environment a) abiotic b) biotic c) decomposer 2) an organism that eats already dead animals a) consumer b) detrivore c) scavenger 3) a substance that an organism needs to grow and maintain its body a) sustainable b) nutrient c) ecology 4) an organism that eats only plants a) omnivore b) consumer c) herbivore 5) an organism that hunts other living things for food a) prey b) carnivore c) predator 6) an organism that feeds on large parts of decaying plants, animal matter and on waste material a) detrivore b) biotic c) omnivore 7) interaction between individuals of different species that benefits both individuals a) biotic b) mutualism c) cycle 8) the study of relationships between organisms, and their environment a) biotic b) pyramid of numbers c) ecology 9) the environment where an organism lives a) habitat b) biotic c) producer 10) an animal that is hunted by a predator a) omnivore b) prey c) biotic 11) a model that shows the number of individuals at each level in a food chain or food web a) pyramid of numbers b) food chain c) food web 12) the network of interactions that link the living and non living parts of an environment a) biotic b) ecosystem c) habitat 13) an organism that makes its own food from non-living materials a) producer b) prey c) abiotic 14) a system in which the amount of matter remains constant over time a) closed system b) biotic c) sustainable 15) a sequence that shows how energy and nutrients are transferred from one organism to another in an ecosystem a) food web b) food chain c) carnivore 16) an organism that eats other animals only a) omnivore b) biotic c) carnivore 17) a process by which plants use water, carbon dioxide, and sunlight to produce food a) photosynthesis b) biotic c) predator 18) something that can be maintained and used indefinitely a) robot b) sustainable c) biotic 19) an organism that eats both plants and animals a) omnivore b) predator c) herbivore 20) a model that shows how food chains in an ecosystem are connected a) food webs b) pyramid of numbers c) biotic 21) the struggle that happens when organisms in the same habitat try to use the same resources a) mutualism b) competition c) biotic 22) an organism that consumes and breaks down dead organisms and waste matter into simple substances a) decomposer b) biotic c) detrivore 23) an organism that eats other living things for energy a) predator b) consumer c) biotic 24) a pattern in nature that repeats over time a) abiotic b) cycle c) biotic 25) living parts of an environment a) predator b) biotic c) prey

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