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chapter 3


organisms a living thing
habitat the type of environment that helps the animal live and grow
biotic factors part of a habitat that provides the living and non-living part of a habitat
abiotic factors are the non-living part of a habitat
photosynthesis sunlight,water,oxygen,temperature, and soil
species a group of organisms that are physically similar
population a group of two or more organisms
community a lot of populations close enough to interact with each other
ecosystem when animals make mountains,streams,deep oceans, and evergreen forests their homes
ecology how an organism reacts to changes to it's habitat
estimate an approximation of a number, based on reasonable assumptions
birth rate the number of births in a certain amount of time
death rate the number of deaths in a certain amount of time
immigration moving into a population
emigration leaving a population
carrying capacity the amount of organisms in a habitat
population density number of individuals in a unit area
limiting factor an environmental factor that causes a population to decrease
Created by: wdenny