17-1 the Fossil Record<br />
Paleontologist<br />Scientists who studies fossils<br />
Fossil record<br />Information about past life, including the structure of organisms, what they ate, what ate them, in wha...
Extinct<br />Term used to refer to a species that has died out<br />
Relative dating<br />Method of determining the age of a fossil by comparing its placement with that of fossils in other la...
Index fossil<br />Distinctive fossil used to compare the relative ages of fossils<br />
Half-life<br />Length of time required for half the radioactive atoms in a sample to decay<br />
Radioactive Dating<br />Technique in which scientists calculate the age of a sample based on the amount of remaining radio...
Geologic time scale<br />Scale used by paleontologist to represent evolutionary time.<br />
era<br />One of several subdivisions of the time between the Precambrian and the present<br />
Period<br />Unit time into which eras are subdivided<br />
Key Concept<br />The fossil record provides evidence about the history of life on Earth. It also shows how different group...
Key concept<br />Relative dating allows paleontologists to estimate a fossil’s age compared with that of other fossils.<br />
Key concept<br />In radioactive dating, scientists calculate the age of a sample based on the amount of remaining radioact...
Key Concept<br />After Precambrian Time, the basic divisions of the geologic time scale are eras and periods.<br />
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Biology 17.1

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Biology 17.1

  1. 1. 17-1 the Fossil Record<br />
  2. 2. Paleontologist<br />Scientists who studies fossils<br />
  3. 3. Fossil record<br />Information about past life, including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived<br />
  4. 4. Extinct<br />Term used to refer to a species that has died out<br />
  5. 5. Relative dating<br />Method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock.<br />
  6. 6. Index fossil<br />Distinctive fossil used to compare the relative ages of fossils<br />
  7. 7. Half-life<br />Length of time required for half the radioactive atoms in a sample to decay<br />
  8. 8. Radioactive Dating<br />Technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains.<br />
  9. 9. Geologic time scale<br />Scale used by paleontologist to represent evolutionary time.<br />
  10. 10. era<br />One of several subdivisions of the time between the Precambrian and the present<br />
  11. 11. Period<br />Unit time into which eras are subdivided<br />
  12. 12. Key Concept<br />The fossil record provides evidence about the history of life on Earth. It also shows how different groups of organisms, including species, have changed over time.<br />
  13. 13. Key concept<br />Relative dating allows paleontologists to estimate a fossil’s age compared with that of other fossils.<br />
  14. 14. Key concept<br />In radioactive dating, scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains.<br />
  15. 15. Key Concept<br />After Precambrian Time, the basic divisions of the geologic time scale are eras and periods.<br />

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