PSSA Vocab
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| 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.
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| Engineering | The application of scientific, physical, mechanical and mathematical principles to design processes, products and structures that improve the quality of life.
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| Allele | Any of a set of possible forms of a gene.
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| Enzyme | A protein that increases the rate of a chemical reaction without being changed by the reaction; an organic catalyst.
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| Nonpoint Source Pollution | Contamination that originates from many locations that all discharge into a location (e.g., a lake, stream, land area).
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| Embryology | The branch of biology dealing with the development of living things from fertilized egg to its developed state.
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| Carbon Chemistry | The science of the composition, structure, properties and reactions of carbon based matter, especially of atomic and molecular systems; sometimes referred to as organic chemistry.
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| Biochemical Conversation | The changing of organic matter into other chemical forms.
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| Scale | Relates concepts and ideas to one another by some measurement (e.g., quantitative, numeral, abstract, ideological); provides a measure of size and/or incremental change.
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| Biomass Conversation | The changing of organic matter that has been produced by photosynthesis into useful liquid, gas or fuel.
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| Theory of Evolution | A theory that the various types of animals and plants have their origin in other preexisting types and that the distinguishable differences are due to modification in successive generations.
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| Incinerating | Burning to ashes; reducing to ashes.
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| Hazardous Waste | A solid that, because of its quantity or concentration or its physical, chemical or infectious characteristics, may cause or pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported
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| Biological Diversity | The variety and complexity of species present and interacting in an ecosystem and the relative abundance of each.
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| 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.
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| Point Source Pollution | Pollutants discharged from a single identifiable location (e.g., pipes, ditches, channels, sewers, tunnels, containers of various types).
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| Nova | A variable star that suddenly increases in brightness to several times its normal magnitude and returns to its original appearance in a few weeks to several months or years.
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| Science | Search for understanding the natural world using inquiry and experimentation.
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| Mitosis | The sequential differentiation and segregation of replicated chromosomes in a cell’s nucleus that precedes complete cell division.
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| Radioactive Isotope | An atom that gives off nuclear radiation and has the same number of protons (atomic number) as another atom but a different number of neutrons.
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| Risk Management | A strategy developed to reduce or control the chance of harm or loss to one’s health or life; the process of identifying, evaluating, selecting and implementing actions to reduce risk to human health and to ecosystems.
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| Waste Stream | The flow of (waste) materials from generation, collection and separation to disposal.
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