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Grade 6 Environment
Vocabulary Review Ch 1 Environment book
| Question | Answer |
|---|---|
| ecosystem | all the living and nonliving things that interact and 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 nonliving parts of an ecosystem |
| population | all the members of one species in a particular area |
| community | all the different populations that live together in an area |
| unit of organization in an ecosystem | organism, populaton, community, ecosystem |
| ecology | the study of how living things interact with each other and with their environment |
| population density | the number of individuals divided by the unit area |
| direct observation | counting the population one by one |
| indirect observation | counting the tracks, nests, or other signs of the population, then estimating the number of organisms |
| mark and recapture | capture an animal, mark it, release it, recapture and count |
| birth rate | the number of births in a population over a period of time |
| death rate | the number of deaths in a population over a period of time. |
| immigration | moving into a population |
| emmigration | leaving a population |
| limiting factors | an environmental factor the prevents a population from increasing |
| carrying capacity | the largest population that an evironment can support |
| adaptations | the behaviors and physical characteristics of species that allow them to live successfully in their environment |
| niche | an organism's particular role, or how it makes it living |
| 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 kills another for food |
| prey | an organism that is killed and eaten by a predator |
| symbiosis | a close relationship between two species that benefits at least one of the species |
| mutualism | a relationship is which both species benefit |
| commensalism | a relationship in which one species benefits and the other species is neither helped nor harmed |
| parasitism | a relationship in which one organism lives on or inside another organism and harming it |
| parasite | the organism that benefits in a parasitic relationship |
| host | the organism a parasite lives in or on |
| estimate | the approximation of a number |
| photosynthesis | the process of using water, sunlight, and carbon dioxide to make food |
Created by:
Dcoleman
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