Ohio 5th Grade Harcourt Science Ecosystems and Change
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Created by:
msrhoffman on April 16, 2012
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Ohio 5th Grade Harcourt Science Ecosystems and Change
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27 terms
Terms | Definitions |
|---|---|
 population | a group of organisms of one kind that live in one location |
| community | a group of populations that live together |
| competition | a kind of contest among populations or individuals with the same niche |
| adaptation | a trait or characteristic that helps an organism survive |
| symbiosis | a relationship between different kinds of organisms |
| predator | an animal that kills and eats other animals; an example is hawk or wolf |
| prey | an animal that is eaten by a predator; example is mouse or rabbit |
| succession | a gradual change in the kinds of organisms living in an ecosystem |
| extinction | the death of all the organisms of a species |
| pollution | any change to the natural environment that can harm living organisms and damage an ecosystem |
| acid rain | a mixture that falls to Earth of rain and acids from air pollution |
| habitat | an area where an organism can find everything it needs to survive |
| conservation | the preserving, protecting, or saving of natural resources |
| reclamation | the process of cleaning and restoring a damaged ecosystem |
| sun, air, water | another part of the physical environment of an ecosystem |
| mutualism | symbiotic relationship that benefits both organisms; an example is ants taking care of insects called aphids |
| commonsalism | symbiotic relationship in which one species benefits and the other species is neither harmed nor benefits; (one benefits and one just hangs out); an example is sharks and small fish called remoras |
| parasitism | symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it; examples are virus, bacteria, roundworms, tapeworms |
| causes of succession | climate change; organisms living in the ecosystem; adding new plants/animals to an ecosystem |
| primary succession | begins with bare rocks and takes a long time |
| secondary succession | helps rebuild damaged ecosystems; occurs in places where soil already exists |
| things that create pollution | chemicals (fertilizer) and fuels (gas, oil, coal) |
| ways people affect ecosystems | fencing; cutting down forests; introducing organisms from other places |
| ways people can help with conservation | reduce; reuse; recycle |
| reduce | to use less of something |
| reuse | Use something again instead of throwing it away |
| recycle | to reprocess resources to be used again |
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