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Byers Age of Eart
Fossils, Geologic Time
| Question | Answer |
|---|---|
| Paleontology | Study of fossils |
| Known Age | The age of an artifact as determined by a date printed on it or a reference to the artifact in a work of history. |
| dendrochronology | the process of counting tree rings to determine the age of a tree. |
| master tree ring pattern | groups of tree ring patterns that archaeologists catalog for specific global regions. |
| radiometric dating | using radioactive process to determine the age of an item |
| absolute age | the calculated age of an artifact from a specific dating method that is used to determine when the artifact was made. |
| principle of superposition | when artifacts are found in rock or earth that is layered, the deeper layers hold the older artifacts |
| relative age | age of something compared with the ages of other things |
| strata | distinct layers |
| permineralized/petrified | fossils in which teh spaces inside are filled with minerals from groundwater. |
| carbonization | thin film of carbon residue preserved as a fossil |
| carbonization | Common for most plant fossils. |
| cast | type of fossil that forms when crystals fill a mold or sediments wash into a mold and harden into rock |
| index fossils | remains of species that existed on Earth for a relatively short period of time, were abundant, and were widespread geographically |
| Eon | formed by two or more geological eras form , which is the largest division of geologic time, lasting many hundreds of millions of years. |
| era | comprised of two or more geological periods , which is hundreds of millions of years in duration. |
| period | The basic unit of geological time in which a single type of rock system is formed, lasting tens of millions of years. |
| Epoch | a division of a geologic period; it is the Smallest division of geologic time, lasting several million years. |
| Age | A unit of geological time which is distinguished by some feature ,like ice. Shorter than epoch, usually lasting from a few million years to about a hundred million years. |
| fossil | The preserved remains of a once-living organism. |
| In what era did Homo Sapiens evolve? | Cenozoic |
| In what era are Dinosaurs are dominant? | Mesozoic |
| In what era are Amphibians Dominant? | Paleozoic |
| In what period did Dinosaurs become extinct? | Cretaceous |
| In what era do the following periods belong: Quaternary, Neogene, Paleogene? | Cenozoic |
| In what era did the Appalachians beginto form? | Paleozoic |
| In what period did the Paleozoic Era begin? | Cambrian |
| What types of species appeared in the Cenozoic Era? | Humans, larger mammals |
| What types of species appeared in the Mesozoic Era? | Small mammals,birds, dinosaurs, |
| What types of species appeared in the Paleozoic Era? | Early reptiles,amphibians, fish, gymnosperms |
| What types of species appeared in the Precambrian Era? | Worms, jellyfish |
Created by:
byersd2000
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