4.3 Ecosystems
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| An _________ is an area where living and nonliving things interact. | ecosystem
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| _________ factors of an ecosystem include things such as sunlight, water, nutrients, soil, and air | nonliving
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| All the organisms of the same species that live in the same place at the same time are a __________. | population
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| The populations of species that live in the same place at the same time together make up a _________. | community
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| The interactions and organization within an ecosystem is based on the utilization of the energy from the ___. | sun
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| The greatest amount of energy in an ecosystem is in the __________. | producers
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| The sun’s energy cycles through ecosystems from producers through consumers and back into the nutrient pool through ___________. | decomposers
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| Within a community, organisms are dependent on the ________ of other organisms. | survival
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| ______ is passed from one organism to another as modeled in a food chain or food web. | energy
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| A food ___ illustrates the interconnected and overlapping food chains in an ecosystem | web
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| The arrow in a food chain always points to the organism doing the ______. | eating
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| Arrows in a food chain show the ____ of energy within the food chain | flow
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| Members of a __________ compete to obtain resources, mates, and territory, and they cooperate to meet basic needs. | population
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| A _______is the place where an animal or plant naturally lives. | habitat
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| An organism’s habitat provides food, water, _______, and space. | shelter
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| The ____ of the habitat depends on the organism’s needs | size
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| A _____ is the function or role that an organism performs in the food web of that community. | niche
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| A niche also includes everything else the _________ does and needs in its environment, including what it eats and how it interacts with other organisms and the nonliving factors in its environment. | organism
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| Organisms that share the same need for resources must _______ to meet their needs. | compete
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| During its ____ _____, an organism’s role in the community (niche) may change. What an animal eats, what eats it, and other relationships may change. | life cycle
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