Biology-Evolution
10 vocab terms for the quiz on 5/8/07 for Kern's class
Terms
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- Index Fossils
- distict fossils used to compare the relative age of fossils
- Relative Dating
- the age of fossils is determined by comparing its placement with that of other fossils in other layer
- Fossil Records
- provides evidence about the history of lfe on Earth, also shows the adaption of animals over time
- Paleontologist
- scientist who study fosils
- geologic time scale
- represent evolutionary time, used by paleontologist
- Eras
- one of several subdivisions of the time between the Precambrian and the present
- Half-Life
- length of time required for half of the radioactive atoms in a sample to decay
- Radioactive Dating
- technique in which scientist calculate the age of a sample based on the amount of remaining radioactive isotopes it contains
- Extinct
- a species that has dies out
- Periods
- Eras are subdivided into periods