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| A geologic eon of the Earth pre-dating the Archean. It began with the formation of the Earth about 4.6 billion years ago and was named after the greek God Hades |
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the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
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a bacterium or other microorganism that grows best at higher than normal temperatures.
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the original evolution of life or living organisms from inorganic or inanimate substances.
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the theory that life on the earth originated from microorganisms or chemical precursors of life present in outer space and able to initiate life on reaching a suitable environment.
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| noting or pertaining to rocks of the Archeozoic portion of the Precambrian Era. |
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| a tenet in evolutionary theory maintaining that species evolve slowly and continuously over long periods of geological time. |
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| microorganisms that thrive in acidic environments where the pH level is less than 3 |
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all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds
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Uniformitarianism
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| theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes. |
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the circulation of carbon atoms in the biosphere as a result of photosynthetic conversion of carbon dioxide into complex organic compounds by plants, which are consumed by other organisms: the carbon returns to the atmosphere in the form of carbon dioxide as a result of respiration, decay by fungi, bacteria, etc., and combustion of fossil fuels. |
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| clearing of trees, transforming a wooded area into cleared land. |
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| accumulation of sand and dirt that settles in the bottom of lakes |
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| any of the almost spherical concentric regions of matter that make up the earth and its atmosphere, as the lithosphere and hydrosphere. |
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any of a diverse group of widely distributed archaebacteria that occur in anaerobic environments, as the intestinal tracts of animals, freshwater and marine sediments, and sewage, and are capable of producing methane from a limited number of substrates, including carbon dioxide and hydrogen, acetate, and methylamines: an important source of natural gas. |
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| any organism, as certain halobacteria and marine bacteria, that requires a salt-rich environment for its growth and survival. |
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| Organisms that thrive in physically or geochemically extreme conditions. |
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| Study of prehistoric life |
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| the branch of paleogeography dealing with the study of paleoclimates. |
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| any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively. |
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| A domain of organisms that contains a nucleus; Consists of the Protista, Fungi, Plantae, and Animalia. |
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| A government agency that is intended to protect human and environmental health. |
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| is the study of evolutionary relationships among biological entities - often species, individuals or genes |
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| The theory of evolution by which organisms change over time as a result of changes in heritable physical or behavioral traits. |
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is figuring out the order of DNA nucleotides, or bases, in a genome—the order of As, Cs, Gs, and Ts that make up an organism's DNA. |
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| Rises in the Earth's surface temperature and atmospheric CO2 concentrations. |
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| The idea that Earth has been affected in the past by sudden, short-lived, violent events. |
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| Describes the continuous movement of water on, above and below the surface of the Earth; Also known as the water cycle. |
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| A geologic period when many new dinosaurs emerged. |
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| A geological era where continents and complex organisms first began to form. |
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| The conversion of a vapor or a gas to a liquid |
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| The process of turning from liquid into vapor. |
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| Buried erosional or non-depositional surface separating two rock masses of different ages, indicating that sediment deposition was not continuous. |
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| The changing of a structure of a gene |
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| The act of not eating or using animal products |
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| The path of the Earth or other planets around the Sun |
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| wearing away of a rock by grinding action |
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| a law stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom. |
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Molecular Biology
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| the branch of biology that deals with the structure and function of the macromolecules essential to life. |
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| the state or process of a species, family, or larger group being or becoming extinct. |
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