1. Jeopardy
Fossils
Relative Aging
Absolute Dating
Geologic Time
Earth’s History
100
100
100
100
100
100
200
200
200
200
200
200
300
300
300
300
300
300
400
400
400
400
400
400
500
500
500
500
500

2. This is a hollow area in sediment in the shape of an organism

3. Mold
A 100

4. This provides evidence of the activities of ancient organisms

5. Trace Fossils
A 200

6. This type of fossil is created when minerals replace all or part of an organism

7. Petrified
A 300

8. This is the change or advancement of life over long periods of time

9. Evolution
A 400

10. Scientist that studies fossils

11. Paleontologist
A 500

12. This is the age of a rock compared to other rocks around it
B 100

13. Relative Age
B 100

14. This is created when magma cools and hardens within the Earth’s surface
B 200

15. Intrusion
B 200

16. This is created when lava cools and hardens on the surface of the Earth
B 300

17. Extrusion
B 300

18. This law states that the oldest rock layer is found at the bottom and each higher layer is younger than the layer below it
B 400

19. Law of Superposition
B 400

20. These fossils help geologists match the ages of rock layers.
The fossils were created by organisms that were only one Earth for a relatively short period of time
Trilobites existed for 6% of Earth’s history
B 500

21. Index Fossil
B 500

22. When the amount of radioactive element decreases during radioactive decay, what happens to the amount of the stable element?
C 100

23. Increases
C 100

24. This is the time it takes for half of the radioactive atoms to decay in a radioactive element

25. Half-Life
C 200

26. This occurs when the elements of a radioactive element break down into a stable element.

27. Radioactive Decay
C 300

28. DAILY DOUBLE
DAILY DOUBLE
C 400

29. What is the age of a rock that has 1/8 of the Potassium-40 that it started with. The half-life of Potassium-40 is 1.3 billion years.
C 400

30. 3.9 billion years
C 400

31. What radioactive element is used to find the age of once-living organisms?

32. Carbon-14
C 500

33. How many billions of years old is the Earth according to scientists?

34. 4.6 billion years
D 100

35. What era name means “ancient” or “old”

36. Paleozoic
D 200

37. What era name means “recent” or “new”
D 300

38. Cenozoic
D 300

39. What are eras subdivided into?

40. Periods
D 400

41. This is a record of geologic events and the evolution of life forms of Earth’s History

42. Geologic Time Scale
D 500

43. What kind of life was present during the Precambrian time?

44. Unicellular Life
E 100

45. What is the significance of the boundary between Precambrian Time and the Paleozoic Era?

46. Explosion of Life
E 200

47. Which era is considered the Age of Reptiles

48. Mesozoic
E 300

49. Time span that lasted for 88% of Earth’s history

50. Precambrian Time
E 400

51. Why were mammals and birds able to evolve in size (become larger) at the start of the Cenozoic Era?

52. Dinosaurs went extinct reducing the competition for resources

53. This is a break in the Earth’s crust
F 100

54. Fault
F 100

55. What do you call organisms that do not have a backbone
F 200

56. Invertebrate
F 200

57. The age of a rock represented in number of years that have passed since a rock formed

58. Absolute Age
F 300

59. These are gaps in the geologic record caused by erosion
F 400

60. Unconformity
F 400

61. F 500

62. F 500