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Science Red Book Ch8

Interactions of Living Things

QuestionAnswer
Abiotic Factor Any nonliving part of the enviroment, such as water, sunlight, temperature, and air.
Biosphere Part of Earth that supports life-the toppart of Earth's crust, all the waters covering Earth's surface, and the surrounding atmosphere; includes all biomes, ecosystem, communities, and populations.
Biotic Factor Any living or once-living organisim in the environment.
Community All of the populations of different species in a given area that interact in same way and depend on one another for food, shelter and other needs.
Ecology Study of all the interactions among organisims and their environment.
Ecosystem All of the communities in a given area and the the abiotic factors that affect them.
Food Chain Model that describes how energy in the form of food passes from one organism to another.
Food Web Model that describes how energy in the form of food moves through a community; a series of overlapping food chains.
Habitat Place where an organism lives.
Limiting Factor Any biotic or abiotic factor that limits the number of individuals in a population.
Niche Role of an organism in the ecosystem, including what it eats, how it interacts with other orgainsms and how it gets its food.
Population All of the members of one species that live in the same space at the same time.
Population Density Number of individuals in a population that occupies a definite area.
Symbiosis Any close relationship between species, including mutualism, commensalism, and parasitism.
Water Cycle Model describing how water moves from Earth's surface to the atmosphere and back to the surface again through evaporation, condensation, and percipitation.
Created by: Moeko
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