Fall Semester Final Review

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What is a Decomposer?

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An organism that breaks down dead or decaying organic material, returning nutrients to the ecosystem.

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What is a Producer in an ecosystem?

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An organism that can make its own food through photosynthesis or chemosynthesis, such as plants.

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What is a Primary Consumer?

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An organism that eats producers; typically herbivores.

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What is a Secondary Consumer?

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An organism that eats primary consumers; can be carnivores or omnivores.

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What is a Food Chain?

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A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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What is a Food Web?

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A complex network of feeding relationships among various organisms in an ecosystem.

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What is Population Density?

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The number of individuals living in a given area, often expressed as individuals per unit area.

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What is Population Distribution?

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The way in which individuals are spread out across a given area.

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What is Seafloor Spreading?

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The process by which new oceanic crust forms when magma rises up and solidifies at the mid-ocean ridge.

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What are Nonrenewable Natural Resources?

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Resources that cannot be replenished in a short period of time, such as fossil fuels.