Geologic Time Scale

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Across
  1. 3. a group of living organisms consisting of similar individuals capable of exchanging genes
  2. 7. age the approximate age of a specific rock layer
  3. 9. the third planet from the solar system
  4. 10. a period of one hundred years
  5. 11. a length or portion of time.
  6. 12. individuals that study and investigate the natural world
Down
  1. 1. the weather conditions prevailing in an area
  2. 2. a line that marks the limit of something
  3. 4. natural world around us
  4. 5. an expert in or student of geology
  5. 6. the available body of infomation that tends to prove or disprove something
  6. 8. time the extensive interval of time occupied by the geologic history of Earth