2. From RegentsEarth.com

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5. Back How old is the Earth? Ques. #1 4.6 billion years Ans.

6. What is the duration of the Silurian period? Back Ques. #2 Ans. 28 million years

7. During which period did the eurypterids become extinct? Back Ques. #3 Ans. Permian

8. How old are the oldest known rocks? Back Ques. #4 Ans. About 4.2 billion years

9. Why didn’t dinosaurs eat flowering plants? Back Ques. #5 Ans. Flowering plants didn’t evolve until after the dinosaurs were extinct.

10. During which period of Earth history did North America collide with Avalon? Back Ques. #6 Devonian Ans.

11. Name 2 characteristics of a good index fossil. Back Ques. #7 Ans. Relatively brief existence and wide distribution

12. Lichenaria, Cystiphyllum, and Pleurodictyum are all........... Back Ques. #8 Ans. Corals

13. When did the Palisade sill intrude? Back Ques. #9 Ans. About 200 million years ago

14. When did extensive coal-forming forests exist on Earth? Ques. #10 Back Ans. During the Pennsylvanian division of the Carboniferous period or between 299 and 318 million years ago

15. Near which NYS city (pick only one) might there be fossils of the first coral reefs? Back Ques. #11 Ans. Oswego, Watertown, Utica, Massena, Plattsburgh,or Albany

16. What was the duration of the Phanerozoic eon? Back Ques. #12 Ans. 542 million years

17. Why are there no fossils of the earliest grasses in NYS? Back Ques. #13 Ans. Earliest grasses appeared during the Paleogene period and there are no Paleogene rocks in NYS

18. During which epoch did the advance and retreat of the last continental ice sheet occur? Back Ques. #14 Ans. The Pleistocene

19. For about how many years were the trilobites on Earth? Back Ques. #15 Ans. About 290 million years

20. When did the earliest stromatolites evolve? Back Ques. #16 Ans. About 3.3 billion years ago

21. Back Ques. #17 Ans. 11,400 years How many years is represented by time B?

22. Which is the oldest layer? Back Ques. #18 Ans. Grey limestone

23. What is the half-life of this element? Back Ques. #19 Ans. 200 years

24. Back Ques. #20 Ans. Element ‘B’ Which element is uranium 238?

25. Back Ques. #21 Ans. D, C, B, E, fault, erosion of B & E, A Put all the events in order from oldest to youngest.

26. The “stable decay product” shown in the graph is probably Back Ques. #22 Ans. Nitrogen 14

27. Which element has the longest half life? Back Ques. #23 Ans. Element ‘D’

28. During which geologic era did Pangaea begin to break up? Back Ques. #24 Ans. Mesozoic

29. Which column contains the youngest rock? Back Ques. #25 Ans. Column III

30. Back Ques. #26 Ans. 359 million years ago? When did this become extinct?

31. In which New York State landscape region might Garnet be found? Back Ques. #27 Ans. Adirondack Mountains

32. Near which NYS city might it be possible to find mammoth bones in the sediments? Back Ques. #28 Ans. Riverhead or New York City

33. What was happening in NYS at the time when the earliest flowering plants were appearing? Back Ques. #29 Ans. The dome-like uplift of the Adirondack region was beginning

34. A fossil contains a C 14 to N 14 in a ratio of 1:3. In which geologic period did this fossil originate? Back Ques. #30 Ans. Quaternary

35. YOU’RE A WINNER! The Neogene and the Ordovician are periods of Earth history