1. Test Review
Topics of the test: - Geological Time - Fossils - Relative Dating - Absolute Dating

2. Question 1

4. Question 2

6. Question 3

8. Question 4
You find a strange fossil and are trying to determine its age. You know that it started with 80 grams of carbon. It loses half of that every 6,000 years. The fossil currently has 20 grams of carbon. Determine how old the fossil must be.

9. You find a strange fossil and are trying to determine its age
You find a strange fossil and are trying to determine its age. You know that it started with 80 grams of carbon. It loses half of that every 6,000 years. The fossil currently has 20 grams of carbon. Determine how old the fossil must be.
12,000 years

10. Question 5
The _________ was an era dominated by the dinosaurs

11. The _________ was an era dominated by the dinosaurs Mesozoic

12. Question 6
Which of the following represents the longest time period Precambrian Paleozoic Mesozoic Cenozoic

13. Which of the following represents the longest time period Precambrian

14. Question 7 What is the current accepted age of Earth?
200 million years
4.6 Billion years
10 billion years
20.5 million years

15. What is the current accepted age of Earth?
4.6 Billion years

16. Question 8
Which of the following gases was NOT part of the Earths original atmosphere?
Water vapor
Oxygen
Nitrogen
Carbon Dioxide

17. Which of the following gases was NOT part of the Earths original atmosphere?
Oxygen

18. Question 9 Which title best describes the current geological age?
Age of _____________

19. Which title best describes the current geological age?
Age of mammals

20. Question 10
If a sample has 1000g of a radioactive isotope, how much will be left after 3 half lives?
500g
150g
125g
250g

21. If a sample has 1000g of a radioactive isotope, how much will be left after 3 half lives?

22. Question 11
An undeformed sedimentary layer is __________ than the layer above and _______ than the layer below.
younger ---younger younger --- older older --- younger older --- older

23. An undeformed sedimentary layer is __________ than the layer above and _______ than the layer below. older --- younger

24. Question 12
Fossils are most common in which rock types?

25. Fossils are most common in which rock types? sedimentary

26. Question 13
What is the name for an erosion surface that separates two sets of sedimentary layers with non-parallel bedding planes?
cross-bedding formation angular unconformity fault

27. What is the name for an erosion surface that separates two sets of sedimentary layers with non-parallel bedding planes? angular unconformity

28. Question 14
A rock formed with 1,000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the half-life is 1,000,000 years, how old is the rock?
250,000 years 500,000 years 1,000,000 years 2,000,000 years

29. A rock formed with 1,000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the half-life is 1,000,000 years, how old is the rock?
2,000,000 years

30. Question 15 Which of the following will not make a fossil?
decomposed organic material plant impressions (casts) animal footprints loose animal bones

31. Which of the following will not make a fossil
Which of the following will not make a fossil? decomposed organic material

32. Question 16 A nonconformity is _________ .
A. a rock unit that is different than units above or below it B. a gap in the geologic record bounded below by metamorphic or igneous rocks and bounded above by sedimentary rocks C. a rock unit that does not contain fossils D. a sequence of rocks that does not contain any gaps in the geologic record

33. A nonconformity is _________. B
A nonconformity is _________ . B. a gap in the geologic record bounded below by metamorphic or igneous rocks and bounded above by sedimentary rocks

34. Question 17
Which of the following units is the youngest?

35. Which of the following units is the youngest?A

36. Question 18
Which of the following units is the oldest?

37. Which of the following units is the oldest?

38. Question 19 Which of the following happened most recently?
deposition of unit C deposition of unit B deposition of unit F tilting of C,D,E, and F

39. Which of the following happened most recently?
deposition of unit B

40. Question 20
Which of the following radioactive isotopes has the longest half-life?
rubidium-87 potassium-40 carbon-14 uranium-238

41. Which of the following radioactive isotopes has the longest half-life?
uranium-238

42. Question 21
Which of the following radioactive isotopes has the shortest half-life?
rubidium-87 potassium-40 carbon-14 uranium-238

43. Which of the following radioactive isotopes has the shortest half-life
Which of the following radioactive isotopes has the shortest half-life? carbon-14

44. Question 22
Human beings evolved during which geologic era?

45. Human beings evolved during which geologic era? Cenozoic

46. Question 23
Large reptiles became abundant during the ________Era?

47. Large reptiles became abundant during the ________Era? Mesozoic

48. Question 24
Land plants appeared during the ________Era?

49. Land plants appeared during the ________Era? Paleozoic

50. Question 25

51. B C A F D E

52. 1st period winners
1: Emma, Adam, Alexis, Jackie - 5 2:Chloe, Lance, Mateo, David - 3 3: Adolfo, Charlie, Junior, Nathan - 2

53. 2nd period winners 1st place: Justin, Safiya, Brandon, Chastity
2nd: Orion
3rd: Allison, Victoria, Marcos, Peyton