Chapter 9

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Author:
cskinner
ID:
267370
Filename:
Chapter 9
Updated:
2014-03-21 15:58:11
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Chapter
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Chapter 9
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Chapter 9
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  1. Geologic column
    a ordered arrangement of rocks
  2. era
    small units of geologic time.
  3. periods
    shorter times of eras
  4. epochs
    a smaller time frame, smaller than a period
  5. evolution
    living species that have changed over time.
  6. Precambrian time
    the time period around the formation of the earth
  7. Paleozoic Era
    a time period that started 542 million years ago and ended 251 million years ago
  8. Mass Extinction
    a enormous amount of species die
  9. Mesozoic Era
    a time period that started about 251 million years ago and ended 65 million years ago
  10. Cenozoic Era
    a time period that started about 65 million years ago and includes this time period.

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