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Exploring Fossils: Unraveling Earth's History

Learn about fossils, geologic time, and dating rocks. Discover Earth's eras and the secrets hidden in the layers of rocks. From index fossils to radioactive dating, dive into the world of paleontology. Uncover the mysteries of the past!

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Exploring Fossils: Unraveling Earth's History

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  1. Fossils Determining The Age of Rocks Geologic Time Scale Earth’s Eras Wildcard 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

  2. Mold

  3. Preserved remains

  4. Carbon Film

  5. Trace fossil

  6. age compared with ages of other rock

  7. Relative age

  8. When the oldest layer of rock is at the bottom and each layer that is higher is younger than the layer below it.

  9. The Law of Superposition

  10. Gap in the geologic record where some rock layers have been lost because of erosion

  11. Unconformity

  12. DAILY DOUBLE!!!

  13. Must be widely distributed and represent a type of organism that existed only briefly in order to help geologist tell the relative ages of rock layers

  14. Index fossil

  15. Determine the absolute ages of rocks by determining the amount of a radioactive element in a rock

  16. Radioactive/absolute dating

  17. The last 3 eras of the most recent eon

  18. Cenozoic, Mesozoic, Paleozoic

  19. Longest period of time to shortest

  20. Eons, era, periods, epochs

  21. The end of the Paleozoic was marked by …

  22. Permian extinction

  23. The first vertebrates were…

  24. fish

  25. Present day is part of what era

  26. Cenezoic

  27. The reason the Mesozoic ended

  28. An asteroid hit earth throwing dust into the atmosphere and cooling the climate and killing vegetation

  29. The earliest life form was

  30. Single celled organisms – blue green algae

  31. DAILY DOUBLE!!!!

  32. Why are fossils mostly found in sedimentary rock?

  33. Because they cannot withstand, heat & pressure, and melting and cooling

  34. The evolution of photosynthesis in blue green algae about 2.5 billion years ago led to

  35. Oxygen in the atmosphere

  36. The Paleozoic, Mesozoic and Cenozoic are all broken up into

  37. Periods

  38. This era is referred to as the “Age of the Reptiles”

  39. Mesozoic

  40. Hollow area in the sediment which shows the shape of an organism

  41. mold

  42. Scientists who study, collect and study fossils

  43. Paleontologist

  44. Your third homework assignment of the unit

  45. Compare beginning earth to 600 MA old earth – this will be an essay question!

  46. Define an index fossil and what scientists can use them for

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