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Science PSSA Vocab
Unit 4,5 and 6
| Term | Definition |
|---|---|
| fact | a thing that is indisputably the case. |
| theory | a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained |
| hypothesis | a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. |
| law | a generalization based on a fact or event perceived to be recurrent. |
| model | a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original. |
| inquiry | an act of asking for information. |
| patterns | an arrangement or sequence regularly found in comparable objects or events. |
| regulations | a rule or directive made and maintained by an authority. |
| closing the loop | A link in the circular chain of recycling events that promotes the use of products made with recycled materials. |
| non-renewable resources | Substances (e.g., oil, gas, coal, copper, gold) that, once used, cannot be replaced in this geological age. |
| renewable | A naturally occurring raw material or form of energy that will be replenished through natural ecological cycles or sound management practices (e.g., the sun, wind, water, trees). |
| composting | The process of mixing decaying leaves, manure and other nutritive matter to improve and fertilize soil. |
| evolution | A process of change that explains why what we see today is different from what existed in the past; it includes changes in the galaxies, stars, solar system, earth and life on earth. Biological evolution is a change in hereditary characteristics of grou |
| extinction | The complete elimination of a species from the earth. |
| endangered species | A species that is in danger of extinction throughout all or a significant portion of its range. |
| equillibrium | The ability of an ecosystem to maintain stability among its biological resources (e.g., forest, fisheries, crops) so that there is a steady optimum yield. |
| sustaininability | The ability to keep in existence or maintain. A sustainable ecosystem is one that can be maintained. |
| succession | The series of changes that occur in an ecosystem with the passing of time. |
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22dalton.fay
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