1st 9-week Science EOG Terms Part 1
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Created by:
KathyShelley on May 4, 2011
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20 terms
Terms | Definitions |
|---|---|
 absolute dating | any method of measuring the age of an event or object in years, the actual age for a rock or mineral |
| adaptation | a trait that increases the chances than an organism will survive and reproduce |
| artificial selection | the breeding of plants and animals with desired traits to attempt to produce off spring with these same traits |
| biological evolution | the change over time of living organisms |
| Cenozoic Era | era that began about 66 million years ago, known as the "Age of Mammals" |
| Continental drift theory | theory that states that the gradual shifting of Earth's plates causes continents to change their global positions over time |
| correlation | the matching up of rock layers from different locations |
| convergent plate boundary | the boundary formed by the collision of two lithospheric plates |
| Darwin | naturalist who proposed and provided scientific evidence that all species of life have evolved over time from common ancestors through the process he called natural selection |
| daughter isotope | the stable isotope that results from radioactive decay |
| divergent plate boundary | the boundary between two tectonic plates that are moving away from each other |
| Eon | the largest division of geologic time |
| Epoch | a subdivision of a geologic period |
| Era | a unit of geologic time that includes two or more periods |
| evolution | the change in population of a species over time |
| extinction | the evolutionary termination of a species cuased by the failure to reproduce and the death of all remaining members of the species; the natural failue to adapt to environmental change |
| extinction rate | the rate at which species die off |
| fossil | evidence of past life preserved in rock |
| fossil record | the complete body of fossils that shows how species and ecosystems change over time |
| fossilized | the process of becoming a fossil |
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