Age of the Earth

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Across
  1. 3. / What was the first epoch of the Quarternary Period
  2. 5. / What was the largest animal in the Triassic Period?
  3. 11. / Cretaceous came from what Latin word for chalk
  4. 13. / What was starting to bloom in the Cretaceous Period
  5. 15. / 5-8% of the Earth was ______ ______ in the Cambrian period
  6. 16. / The first _____ fish was in the Silurian Period
  7. 17. / Where did humans emerge first?
  8. 22. / 13.36% of all animals in this epoch went extinct
  9. 24. / who defined the Ordovician in 1879
  10. 29. / What were the only continents in the Pennsylvanian
  11. 32. / The ______ supercontinent was formed in the Permian Period
  12. 33. / _____ was drifting closer to Asia in the Paleogene
  13. 34. / What period had 7 groups of dinosaurs?
  14. 35. / Less than 5% of the animal species in the seas survived
  15. 37. / The Precambrian was the...
  16. 40. / _____ _______ was an Island in the Paleocene
  17. 42. / There were no dinosaurs in the Paleocene
  18. 43. / What did the Earth face in the Triassic Period
  19. 45. / started 2.6 million years (currently in)
  20. 46. / The cold climates and moving plates formed ___________
  21. 49. / On land less than a _____ of the large species made it
  22. 51. / Each day was only 22 hours long in this period
  23. 52. Epoch / what epoch lasted 33.7 to 23.8 m.y.a
  24. 53. / There was an ___ ____ in the middle of this period
  25. 54. / By far the longest warm stable period
  26. 57. / What period had the oldest known fossils of coral reefs
  27. 59. / First big predatory monster
  28. 60. / What were cold-blooded animals in the Quaternary
  29. 61. / There was big ________ ________ in the Pennsylvanian Period
Down
  1. 1. / The last ___ ___ occurred in the Pleistocene
  2. 2. / 1-5% of species were _______
  3. 4. / ______ and _____ ________ were connected in the Paleocene
  4. 6. / started 11,700 years ago to the present day
  5. 7. / Precambrian Era ended due to ____ __________
  6. 8. / earliest known tetrapod
  7. 9. / What mountains were formed in the Paleogene period
  8. 10. / The longest geological Period in the entire Phanerozoic
  9. 12. / What bird was nearly 10 feet tall in the Miocene Epoch
  10. 14. / Abondance of ____________ during this period
  11. 18. / What was the oldest known land plant
  12. 19. / The first geological period in the Paleozoic Era
  13. 20. / Started 23.03 and ended 5.33 m.y.a
  14. 21. / What was deposited during the first half of the Ordovician Period
  15. 23. / What period is named because rocks of this age are exposed in its valley.
  16. 25. / Was the T-Rex in the Jurrasic Period
  17. 26. / Best known for its diverse marine invertebrates
  18. 27. / _____ ________ become larger as they move into open spaces
  19. 28. / ________ with _____ appeared in the Oligocene
  20. 30. / What is the Quaternary Period known as?
  21. 31. / Modern atmosphere was developed in this Era
  22. 36. / This period began too cool and dry
  23. 38. / The Holocene epoch is known as
  24. 39. / This period lasted 320-286 million years
  25. 41. / What were the most common fish in the Mississippian Period
  26. 44. / There was a large ______ _______ trend in the Cambrian
  27. 47. / What was the name of the meteor that killed the dinosaurs in the Jurrasic
  28. 48. / The climate was very ___ and _____ in the Mississippian
  29. 50. / During the Miocene ____ and ____ collided
  30. 55. / What species appeared 50 million years ago
  31. 56. / The first ______ of Australian Marsupials date to this period
  32. 58. / What period did the first dinosaurs walk the land