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Life Sci - Chap 8
vocabulary words
| Question | Answer |
|---|---|
| fossil | remains or physical evidence of an organism preserved by geological processes |
| relative dating | any method of determining whether an event or object is older or younger than other events or objects |
| absolute dating | any method of measuring the age of an event or object in years |
| geologic time scale | the standard method used to divide the Earth's long natural history into manageable parts |
| extinct | describes a species that has died out completely |
| plate tectonics | theory that explains how large pieces of the Earth's outermost layer, called tectonic plates, move and change shape |
| Precambrian time | period in the geological time scale from the formation of the Earth to the beginning of the Paleozoic era, from about 4.6 billon to 543 million years ago |
| Paleozoic era | geological era that followed Precambrian time and that lasted from 543 million to 248 million years ago |
| Mesozoic era | geological era that lasted from 248 million to 65 million years ago; also called Age of Reptiles |
| Cenozoic era | most recent geological era, beginning 65 million years ago; also called Age of Mammals |
| primate | type of mammal characterized by opposable thumbs and binocular vision |
| hominid | type of primate characterized by bipedalism, relatively long lower limbs, and lack of a tail; (humans and their ancestors) |
| Homo sapiens | species of hominids that include modern humans and their closest ancestors and that first appeared about 100,000 to 150,000 years ago |
Created by:
msparks
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