History of Earth crossword

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Across
  1. 2. the supercontinent all the continents were apart of at the beginning of time
  2. 5. Earth first formed during the ______ era
  3. 6. The time period dinosaurs were around in
  4. 9. fossils that are widespread,abundant,and short-lived
  5. 10. uses the decay of radioactive elements to determine the age of a fossil of
  6. 11. preserved remains or traces of animals or plants
Down
  1. 1. a scientist who studies earth's crust and the processes and history that shaped it
  2. 3. history of life as documented by all fossils, preserved in the sedimentary rock strata
  3. 4. someone who studies fossil remains found on earth's surface in order to study primitive life forms such as: plants,animals,fungi,bacteria
  4. 7. rock layers
  5. 8. All of earth's geological history represented on a chronological time chart