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PSSA Vocabulary
| Term | Definition |
|---|---|
| Ecosystem | A community of living organisms and their interrelated physical and chemical environment. |
| Environment | The total of the surroundings (air,water,soil,vegetation,people,wildlife)influencing each living being’s existence, including physical, biological factors; the surroundings of a plant or animal, including other plants or animals, climate and location. |
| Homeostasis | The tendency for a system by resisting change to remain in a state of equilibrium. |
| Abiotic | A nonliving factor or element (e.g., light, water, heat, rock, energy, mineral). |
| Biotic | An environmental factor related to or produced by living organisms. |
| Biomes | Different places that pertain to a certain heat or weather that suits the organisms that inhabit the specific biome.(Diferent Regions, Plants, Animals) |
| Niche | The role played by an organism in an ecosystem; its food preferences, requirements for shelter, special behaviors and the timing of its activities (e.g., nocturnal, diurnal), interaction with other organisms and its habitat. |
| Consumer | 1) Those organisms that obtain energy by feeding on other organisms and their remains. 2) a person buying goods or services for personal needs or to use in the production of other goods for resale. |
| Decomposer | An organism, often microscopic in size, that obtains nutrients by consuming dead organic matter, thereby making nutrients accessible to other organisms; examples of decomposers include fungi, scavengers, rodents and other animals. |
| Shredder | Through chewing and/or grinding, microorganisms feed on non-woody coarse particulate matter, primarily leaves. |
| Dichotomous | The two branches dividing into two choices considered. |
| Pest | A label applied to an organism when it is in competition with humans for some resource. |
| Integrated Pest Management | A variety of pest control methods that include repairs, traps, bait, poison, etc. to eliminate pests. |
| Acid Deposition | Precipitation with a pH less than 5.6 that forms in the atmosphere when certain pollutants mix with water vapor. |
| Stream Order | Energy and nutrient flow that increases as water moves toward the oceans (e.g., the smallest stream (primary) that ends when rivers flow into oceans). |
| Topographic Map | A map that represents the physical features of Earth(3-D, Mountains, Depressions) |
| Watershed | The land area from which surface runoff drains into a stream, channel, lake, reservoir or other body of water; also called a drainage basin. |
| Wetlands | Lands where water saturation is the dominant factor determining the nature of the soil development and the plant and animal communities (e.g., sloughs, estuaries, marshes). |
| Hydrology | The study of water on the Earth(Movements, Quality, Distribution) |
| Groundwater | Water that infiltrates the soil and is located in underground reservoirs called aquifers. |
| Mitigation | The policy of constructing or creating man-made habitats, such as wetlands, to replace those lost to development. |
| Lentic | Relating to or living in still water |
| Lotic | Relating to or living in actively moving water. |
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