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chapter 10
chapter ten environment
| Question | Answer |
|---|---|
| organism | a living thing |
| habitat | an environment that provides the things the organism needs to live, grow,and reproduce. |
| biotic factors | the living parts of a habitat |
| abiotic factors | the nonliving parts of an organisms habitat. |
| photosynthesis | when plants and algae need water along with sunlight and carbon dioxide to make their own food in a process |
| species | a group of organisms that are physically similar and can mate with eachother and produce offspring that also mate and reproduce |
| population | all the members of one spiecies in a particular area. |
| community | all the different populations that live together in an area |
| ecosystem | the community of organisms that live in a particular area,along with their nonliving surroundings |
| ecology | the study of how living things interact with eachother and with their environment |
| birth rate | the number of births in a population in a certain amount of time. |
| death rate | the number of deaths in a population in a certain amount of time. |
| immigration | moving into a population |
| emigration | leaving a population |
| limiting factor | an environmental factor that causes a population to stop growing. |
| limiting factors | some limiting factors for populations are food and water,space,light soil compositions,and weather conditions. |
| carrying capacity | the largest population that an area can support. |
| energy roles | each of the organisms in an ecosystem fills the energy role of producer,consumer,or decomposer. |
| producer | an organism that can make it own food |
| consumer | an organism that obtains energy by feeding on other organisms.for example herbivores, carnivores,omnivores,and a scavenger |
| herbivore | consumer that eats only plants |
| carnivore | eat only other animals |
| omnivores | eats both plants and animals |
| scavenger | a carnivore that feeds on the bodies of dead organisms |
| decomposers | breaks down wastes and dead organisms and return the raw materials to the ecosystem. |
| food chain | a series of events in which one organism eats another and obtains energy |
| food web | consists of the many overlapping food chains in an ecosystem |
| energy pyramid | shows the amount of energy that moves from one feeding level to another in a food web. |
| natural selection | a charactoristic that makes an indevidual better suited to its environment may eventualy become common in that speices |
| adaptations | the behaviors and physical charactoristics that allow organisms to live sucessfully in their environment |
| niche | the role of an organism in its habitat, or how it makes its living |
| competition | the struggle between organisms to survive as they attempt to use the same limited resource |
| predation | an interaction in which one organism kills another for food |
| preditor | the organism that does the killing |
| prey | the organism that gets killed |
| symbiosis | a close relationship between two speices that benefits at least one of the speices |
| mutualism | a relationship in which both speices benefit |
| commensalism | a relationship in which one speices benefits and the other species is neither helped nor harmed |
| parasitism | involves one organism living on or inside another organism and harming it |
| parasite | the organism that benifits |
| host | the organism it lives on or in |
Created by:
alikat
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