1. Types
Cycle
Aging
Dating
Rocks
100
200
300
400
500

2. What are the three types of rocks?
1.1

3. Igneous, Sedimentary, and Metamorphic

4. How would a glassy igneous rock form?
1.2

5. Quick cooling / extrusive

6. What determines the grain size of an igneous rock?
1.3

7. The slower the rock took to cool, the coarser (larger) the grain.

8. What kind of rock is made from solutions of dissolved minerals in water?
1.4

9. Chemical Sedimentary

10. What are the two classifications for metamorphic rock?
1.5

11. non-foliated (no folds)
foliated and
non-foliated (no folds)

12. What is the process by which sediment is dropped and comes to rest?
2.1

13. deposition
deposition

14. What is needed to form metamorphic rock?
2.2

15. heat and pressure

16. How are igneous rocks formed?
2.3

17. by magma cooling and crystallizing

18. What is the first step to becoming a sedimentary rock?
2.4

19. weathering

20. List, in order, four steps to forming sedimentary rock
2.5

21. uplift and exposure, weathering, erosion (transportation), deposition,
compaction,
cementation,
(lithification)

22. What is the term for when the order of geologic events has been established, but no exact date has been determined?
3.1

23. Relative Date

24. Sequence B, G, E, and F from oldest to youngest.
3.2 G, B, E, F
Sequence B, G, E, and F from oldest to youngest.

25. G, B, E, F

26. What are cross-cutting relationships?
3.3

27. an intrusion or fault is younger than the rock it cuts through

28. Describe uniformitarianism.
3.4

29. the processes we observe today are the same processes that happened millions or billions of years ago

30. List 3 of the 5 geological “rules” or principles used to place geologic events in order.
3.5

31. original horizonality, inclusions, cross-cutting relationships,
superposition,
original horizonality,
inclusions,
cross-cutting relationships,
uniformitarianism

32. What is the term used when the exact age of a rock has been determined?
4.1

33. Absolute Age

34. Measuring the age of an object based upon the ratio of parent isotope to daughter decay product is?
4.2

35. Radiometric Dating

36. What is half-life?
4.3

37. The amount of time it takes for half of the radioactive material in an object to decay into the next stage

38. If a sample started out with 60 radioactive isotopes, how many radioactive and how many stable daughter atoms would be present after 2 half-lives?
4.4

39. 15 radioactive
45 stable daughter atoms

40. In what type of rock would you most likely find fossils?
4.5

41. Sedimentary

42. What type of rock is sandstone?
5.1

43. sedimentary

44. What is the classification of limestone (both the type and its subtype)?
5.2

45. organic sedimentary

46. What rock does granite metamorph into?
5.3

47. Gneiss

48. What rock does marble come from?
5.4

49. limestone

50. What are the three processes that form metamorphic rocks?
contact, ? and ?
5.5

51. contact, hydrothermal, and regional