The Time Traveler's Guide to Planet Earth

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Across
  1. 3. The first Supercontinent
  2. 6. The dominant animal of the early periods of geologic time.
  3. 7. Shorter than a period of geologic time.
  4. 8. Longer than a period of geologic time.
  5. 10. The very first period of geologic time.
  6. 11. The only period with humans.
  7. 12. To undergo development.
  8. 15. A rock *****
  9. 16. Even longer than a (Longer than a period of geologic time).
Down
  1. 1. The age of dinosaurs.
  2. 2. Remnant of a dead animal
  3. 4. Someone who came before you.
  4. 5. A large landmass.
  5. 6. ******** plates, Massive rock slates that make up the earth.
  6. 9. The last period of geologic time in the Paleozoic Era.
  7. 13. When a species dies out.
  8. 14. Massive ice piece.