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Geo. Evi Vocab
Geological Evidence Vocabulary
| Definition | Term |
|---|---|
| mineral replacements, preserved remains, or traces of organisms that lived in the past and form when an organism dies and is buried by sediment | fossil |
| this type of fossil leaves a cavity that contains an exact imprint of the organism's shape and size | mold fossil |
| dating technique compares the age of one object to the age of another and it does not provide the exact age of the object | relative age |
| helps geologists correlate the ages of rock layers because it is deposited over a large area in a short amount of time | volcanic ash |
| dating technique assigns actual dates to geological events determined by the property of atoms | absolute age |
| a method of relating the timing and relationship between events that have occurred during the history of the Earth | geologic time scale |
| around 200 million years ago, Earth's continents were once joined as a single, large land mass and bears this name | pangea |
| pangea was pulled apart by these which are found in the Earth's mantle and which are still responsible for slowly moving continental crust to this day | convention current |
| types of seed plants (gymnosperms)were common by the end of this era | paleozoic era |
| states that each rock layer is older than the one above it; the oldest rock rocks or fossils are in the bottom | law of superposition |
| the notion that a process occurring in the present is the same as in the past and would be the same as in the future | uniformitarianism |
| determines a region's climate and environment and can help determine the relative age of a rock layer | index fossil |
| provide evidence of an organism's activities or the behavior of the organism | trace fossil |
| two types of index fossils that have been found on every continent | trilobites and ammonites |
| named by the principles of cross-cutting, magma beneath the surface of the Earth that may push into bodies of rock, cool, and harden into a mass of igneous rock | intrusion |
| process by which all the different kinds of living things have changed over long periods of time. Evidence for this is found in the fossil record | evolution |
| type of blue-green algae oxygen to the atmosphere through photosynthesis | cyanobacteria |
| another term for flowering plants which appeared during the Cretaceous Period | angiosperms |
| referred to as the "Age of the Mammals" | cenozoic era |
| fossil formed from mold fossils. Mineral rich sediments enter the cavity of it which produces an image of the original organism | cast fossil |
| fossils that show little or no change to the organism by encasement, freezing, or drying which keeps out air and tiny organisms | preserved fossil |
| lava that hardens on the surface of the Earth | extrusion |
| organisms that no longer exist on Earth; a species, family, or other larger group having no living members | extinct |
| referred to as "Ancient Life" and began with early invertebrates like trilobites and brachiopods | paleozoic era |
| referred to as "Middle Life" and is known as the Age of the Dinosaurs | mesozoic era |
Created by:
Ms_Anderson
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