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5. 100 200 300 400 500 Modified T/F Modified T/F Multiple Choice Multiple Choice Completion

6. Fossils most often form when a dead organism is buried in sediments. A 100

7. True A 100

8. Absolute age examines the position of rocks in a sequence. A 200

9. False; Relative A 200

10. According to the principle of superposition, the youngest rock layers are closest to the surface. A 300

11. True A 300

12. Carbon films are formed when a thin film of carbon is left, forming an outline of the original organism. A 400

13. True A 400

14. To be a useful index fossil, a species must have been rare. A 500

15. False; common (abundant) A 500

16. Dinosaur footprints are original remains. B 100

17. False; trace fossils B 100

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19. Nonconformities occur when sedimentary rocks are deposited on top of uplifted and eroded metamorphic or igneous rocks. B 200

20. True B 200

21. Index fossils are the remains of species that existed on Earth for relatively short periods of time. B 300

22. True B 300

23. A geologist who needed to correlate two rock formations in different areas could match exposed rock layers. B 400

24. True B 400

25. An unconformity between two sedimentary layers is classified as a disconformity. B 500

26. True B 500

27. With ____ dating, a rock's exact age can be determined, whereas with ____ dating, a rock's age is compared to the ages of other rocks. a. absolute, relative b. relative, absolute c. true, absolute d. relative, approximate C 100

28. With ____ dating, a rock's exact age can be determined, whereas with ____ dating, a rock's age is compared to the ages of other rocks. a. absolute, relative

29. The oldest rock layer in an undisturbed rock sequence occurs ____. a. at the bottom of the sequence b. below the sedimentary rock layer c. below the unconformity d. at the top of the sequence C 200

30. The oldest rock layer in an undisturbed rock sequence occurs ____. a. at the bottom of the sequence

31. DAILY DOUBLE C 300 DAILY DOUBLE Place A Wager

32. What would change in the following picture to represent an isotope of the element chlorine? a. Element - chlorine becomes argon after turning into an isotope b. Atomic Number - the number of protons increases which makes 17 become 18 c. State of Matter - chlorine would become a liquid after turning into an isotope d. Atomic Mass - adding neutrons to protons increases the atomic mass C 300

33. What would change in the following picture to represent an isotope of the element chlorine? a. Element - chlorine becomes argon after turning into an isotope b. Atomic Number - the number of protons increases which makes 17 become 18 c. State of Matter - chlorine would become a liquid after turning into an isotope d. Atomic Mass - adding neutrons to protons increases the atomic mass

34. What classification of unconformity occurs when sedimentary rock overlies igneous rock? a. disconformity b. nonconformity c. angular unconformity d. conformity C 400

35. What classification of unconformity occurs when sedimentary rock overlies igneous rock? a. disconformity b. nonconformity

36. Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____. a. absolute dating b. radiometric dating c. relative dating d. radiocarbon dating C 500

37. Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____. a. absolute dating b. radiometric dating c. relative dating

38. DAILY DOUBLE D 100 DAILY DOUBLE Place A Wager

39. An example of a fossil with altered hard parts includes ____. a. a mummified human body b. a gastrolith c. a saber-toothed cat in tar d. petrified wood D 100

40. An example of a fossil with altered hard parts includes ____. a. a mummified human body b. a gastrolith c. a saber-toothed cat in tar d. petrified wood

41. What is the hardened tree sap that fossil insects are preserved in? a. trace fossils b. gastroliths c. coprolites d. amber D 200

42. What is the hardened tree sap that fossil insects are preserved in? a. trace fossils b. gastroliths c. coprolites d. amber

43. ____ dating uses the properties of atoms in rocks and other objects to find their ages. a. Comparative b. Absolute c. Approximate d. Relative D 300

44. ____ dating uses the properties of atoms in rocks and other objects to find their ages. a. Comparative b. Absolute

45. Radiocarbon dating can be used to determine the age of what type of materials? a. igneous rock b. living organisms c. organic materials d. lava flows D 400

46. Radiocarbon dating can be used to determine the age of what type of materials? a. igneous rock b. living organisms c. organic materials

47. What characteristic of radioactive decay makes it useful for determining the absolute age of samples? a. occurs at a constant rate b. changes based on temperature c. speeds up under high pressure d. slows down in very dense samples D 500

48. What characteristic of radioactive decay makes it useful for determining the absolute age of samples? a. occurs at a constant rate

49. Fossil insects can be found imbedded in _______________, the hardened sap of prehistoric trees. E 100

50. amber

51. The principle of ______________ states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those below them. E 200

52. Superposition

53. A(n) ____________________ forms when the hollowed-out impression of a fossil organism becomes filled with minerals or sediment. E 300

54. cast E 300

55. When the original parts of an organism in a sedimentary rock are weathered and eroded, a hollowed- out impression called a(n) ____________________ forms. E 400

56. mold E 400

57. The gap in the rock record that occurs between folded or uplifted rock layers and a sedimentary rock layer on top of them is called a(n) _________________________. E 500

58. angular unconformity E 500

59. _____________ is the time it takes for half of the atoms in an isotope to decay F 100

60. Half-life F 100

61. DAILY DOUBLE F 200 DAILY DOUBLE Place A Wager

62. _____________states that Earth processes today are similar to those that took place in the past F 200

63. Uniformitarianism F 200

64. A fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits is a ___________. F 300

65. cast F 300

66. F 400 ____________________ is the process of calculating the absolute age of a rock by measuring the amounts of parent and daughter materials in a rock and by knowing the half-life of the parent.

67. F 400 Radiometric dating

68. F 500 A process that uses the properties of atoms in rocks and other objects to find their ages is __________________.

69. F 500 radioactive decay

70. The Final Jeopardy Category is: Radioactive Decay Please record your wager. Click on screen to begin

71. After 28 billion years, what percentage of an original sample of Thorium-232 will remain undecayed? Click on screen to continue

72. 25%

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