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Sci. Chapter 18

QuestionAnswer
Ecosystem All the nonliving things that interact in a particular area
Habitat The place where an organism lives and that provides the things the organism needs
Biotic factors The living parts of an ecosystem
Abiotic factors The non- living parts of an ecosystem
Photosynthesis These organisms use water, along with sunlight and carbon dioxide, to make food in a process
Population All the members in a species in a particular area are referred
Community All the different populations that live together in a area
Ecology The study of how living things interact with each other and with it's environment
Population Density the number of individuals in a specific area
Estimate Is an approximation of a number, based on reasonable assumptions
Birth Rate Is the number of births in a population in a certain amount of time
Death Rate Is the number of deaths in a population in a certain amount of time
Immigration Moving into a population
Emigration Moving out of a population
Limiting Factors Is an environmental factor that prevents a population from increasing
Carrying Capacity The largest population that an environment can support
Natural Selection The changes that make organism better suited to their environments develop through a process
Adaptations The behaviors and physical characteristics of species that allow them to live successfully in their environment
Niche An organisim particular role,
Competition The struggle between organisms to survive in a habitat with limited resources
Predation An interaction in which one organism kills and eats another
Predator The organism that does the killing
Prey The organism that is killed
Mutualism A relationship in which both species benefit
Commensalism A relationship in which one species benefits and the other species is neither helped nor harmed
Symbiosis Is a close relationship between two species that benefits at least one of the species
Parasitism Involves one organism living on or inside another organism and harming it
Parasite The organism that benefits
Host The organism it lives on or in
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