Chapter 10 Interactions of Life

Nonliving part of an ecosystem

• abiotic factor

• biotic factor

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The whole mass of air surrounding Earth

• atmosphere

• biosphere

• hydrosphere

• geosphere

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Living or once-living things in an ecosystem

• abiotic factor

• biotic factor

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All the populations living in the same area at the same time

• community

• habitat

• population

• population density

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All the living things and nonliving things in a given area

• ecosystem

• community

• population

• habitat

Place within an ecosystem that provides food, water, shelter, and other biotic and abiotic factors an organism needs to survive and reproduce

• habitat

• community

• population

• population density

All the organisms of the same species that live in the same area at the same time

• population

• population density

• community

• ecosystem

Symbiotic relationship in which one organism benefits but the other neither benefits nor is harmed

• commensalism

• competition

• mutualism

• parasitism

Demand for resources, such as food, water, and shelter, in short supply in a community

• competition

• mutualism

• commensalism

• parasitism

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Size of a population compared to the amount of space available

• population density

• population

• habitat

• ecosystem