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| an organism that uses oxygen in carrying out respiratory processes |
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| an organism that does not require oxgen for respiration but rather makes use of processes such as fermentation to obtain its energy |
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| pertaining to the division of precambrian time beginning 3/8 billion years ago and ending 2.5 billion years ago |
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| an organism that uses an external source of energy to produce organic nutrients from simple inorganic chemicals |
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| banded iron formation (BIF) |
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| the long-stable regiono f a continent, commonly with Precambrian rocks either at the surface or only thinly covered with younger sedementary rocks |
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| differentiation (planetary) |
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| the process by which a planet becomes interneally zoned, as when heavy materials sink toward its center and light materials accumulate near the surface |
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| a cell containing a true nucleus, enclosed within a nuclear membrane, and having well-defined chromosomes and cell organelles |
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| term used to describe light colored igneous rocks having the general composition of granite |
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| low-grade metamorphic rocks containing abundant chlorite, epidote, and biotite and developed by metamorphism of basaltic extrusive igneous rocks. Great linear outcrops of greenstones are termed greenstone belts and are thought to mark the locations of former volcanic island arcs. |
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| an organism that depends on an external source of organic substancews for its nutrition and energy |
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| an ultramafic volcanic rock prevalent in Archean terrances |
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| metallic or stony bodies from interplanetary space that have passed through the Earth's atmosphere and hit the Earth's surface |
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| The process by which a rock subjected to high temperature and pressure is partially melted, and the liquid fraction moved to another location. Partial melting results from the variations in melting points of different minerals in the original rock mass. |
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| photochemical dissociation |
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| the process of synthesizing carbohydrates from carbon dioxide and water, utilizing the radiant energy of light captured by the chlorophyll in plant cells |
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| the part of a craton covered thinly by layered sedimentary rocks and characterized by relatively stable tectonic conditions |
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| pertaining to all of geologic time and its corresponding rocks before the beginning of the Paleozoic Era |
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| organisms that lack membrane-bounded nuclei and other membrane-bounded organelles |
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| distinctly laminated accumulations of calcium carbonate having rounded, branching or frondose shape and believed to form as a result of the metabolic activity of marine algae. they are usually found in the high intertidal to low supratidal zones |
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