Across
- 2. / The world started to become more... during the Paleogene.
- 4. / The megalodon lived during what time period?
- 10. / how many years ago was the Precambrian
- 13. / humans started to develop when?
- 15. / How long was the Paleogene time period?
- 19. / the paleozoic era began...
- 23. / was a single content
- 27. / What time period did most of the earth's coal come from?
- 28. / The Epoch was during the...
- 30. / what fish started to appear during the Paleozoic
- 31. / why did grazing animals appear
- 34. / 5-8% of the earth during the Cambrian period was...
- 37. / what do call a fish without a jaw
- 39. / What year did we discover the Triassic period?
- 40. / What was the most common fish
- 43. / What time period had the last ice age
- 45. / What percentage of the air was better
- 46. / why do we have coal today?
Down
- 1. / were is the oldest rock
- 3. ago / Permian period
- 5. / What was the nickname for the Devonian period
- 6. / what lived in the oceans during the Precambrian
- 7. / The Paleocene Epoch was the rise in...
- 8. / oceans raised during the Sulurian period because of...
- 9. / The average temp during the Silurian was...
- 11. / The paleozoic introduced the...
- 12. / the Quaternary period lasted?
- 14. Age / Quaternary is also known as?
- 16. / what percent of animals went extinct during the Pliocene Epoch
- 17. / mountains appeared in...
- 18. / What did the sea level do during the Pennsylvanian period?
- 20. / which time period had 22-hour days
- 21. / deep sea organisms went...
- 22. / what appeared 50 million years ago
- 24. / What time period was covered in shallow seas?
- 25. / What were the earliest animals in the Cambrian period
- 26. / the quaternary period end all?
- 29. / The Cambrian had large-scale global...
- 32. / How many years ago was Holocene
- 33. / Sea levels were much lower during the Pleistocene.
- 35. / what did global warming cause
- 36. / animals started to lay hard shells...
- 38. / The water was 11-15%...
- 41. / the Holocene was known as?
- 42. period / less than 5 percent of animals lived in the sea
- 44. / What percent of the earth's surface was ice-covered.