Exam 4: Geology 101, Fall 2000

Select the best answer and fill in the appropriate answer on the scan sheet provided. Make sure you have all SEVEN pages of the test. Make sure your ID # is correctly entered on the scan sheet!

1. Which of the following is part of the definition of geology?

A. the study of the planet earth

B. the study of the materials of which the earth is made

C. the study of the processes that act on these materials

D. all of the above are part of the definition

E. none of the above

2. Minerals are used in many everyday products. Which of the following items do NOT contain minerals?

A. quartz watch

B. cosmetics

C. fertilizer

D. lead pencil

E. all of the above contain minerals

3. Minerals are named:

A. after places

B. based on appearance

C. based on chemistry

D. after people

E. all of the above

4. The most abundant anion in the earth's crust is (a)_____ and the most abundant cation is (b)_____. When the most abundant anion in the earth's crust combines with the most abundant cation, (c) _____is formed.

A. (a) silicon, (b) oxygen, (c) quartz

B. (a) oxygen, (b) silicon, (c) quartz

C. (a) oxygen, (b) carbon, (c) calcite

D. (a) carbon, (b) oxygen, (c) calcite

E. none of the above combinations

5. Minerals are classified based upon:

A. their main anion or anionic complex

B. their main cation or cationic complex

C. their physical properties

D. where they are found

E. none of the above

6. There are three main classes of rocks based upon how the rocks form. (a)_____ rocks form from magma, (b)_____ rocks form from sediment, and (c)_____ rocks form from existing rocks.

A. (a) Igneous, (b) metamorphic, (c) sedimentary

B. (a) Metamorphic, (b) sedimentary, (c) igneous

C. (a) Igneous, (b) sedimentary, (c) metamorphic

D. (a) Sedimentary, (b) igneous, (c) metamorphic

E. none of the above combinations

7. Geologists often study rocks by looking at thin slices of them with a microscope. In this way it can be easy to distinguish an igneous rock from a sedimentary rock because the mineral grains are (a)_____ for the igneous rock, the grains often appear (b) _____ in the sedimentary rock, and they often appear (c)_____ in metamorphic rock.

A. (a) big, (b) small, (c) rounded

B. (a) interlocking, (b) rounded, (c) flattened

C. (a) dark colored, (b) light colored, (c) gray colored

D. (a) rounded, (b) interlocking, (c) flattened

E. none of the above combinations

8. The grain size of igneous rocks provides clues as to where the rock formed. If magma cools rapidly on the surface, the grains are (a)_____, but if the magma cools slowly deep underground, the grains are (b)_____.

A. (a) invisible, (b) visible

B. (a) visible, (b) invisible

C. (a) angular, (b) rounded

D. (a) interlocking, (b) flattened

E. none of the above combinations

9. The grain shapes in sedimentary and metamorphic rocks also give us clues as to how the rock formed. For instance, (a)_____ grains result when sediment is transported a great distance by water, and (b)_____ grains arise from directed stresses that are common during metamorphism.

A. (a) angular, (b) rounded

B. (a) angular, (b) flattened

C. (a) rounded, (b) angular

D. (a) rounded, (b) flattened

E. none of the above combinations

10. Igneous rocks are classified based on (a)_____, sedimentary rocks are classified based on (b)____, and metamorphic rocks are classified based on (c)_____.

A. (a) composition and texture, (b) composition and texture, (c) composition and texture

B. (a) color and grain size, (b) grain size, (c) layering

C. (a) physical properties, (b) composition and texture, (c) mineral content

D. (a) mineral content, (b) grain shape, (c) mineral content

E. none of the above combinations

11. Magma composition affects volcanic eruption styles. For instance, magmas higher in (a)_____ are thicker and cause more violent eruptions, than magma high in (b)_____, which behave more like water. Also, the thickness of the magma relates to the (c)_____

A. (a) Si, (b) Fe and Mg, (c) increased polymerization of the silicate tetrahedron

B. (a) Fe and Mg, (b) Si, (c) increased polymerization of the silicate tetrahedron

C. (a) water, (b) gas, (c) temperature of the magma

D. (a) gas, (b) water, (c) temperature of the magma

E. none of the above combinations

12. If mud-sized grains derived from granite are deposited in a lake, they might later form the layered sedimentary rock (a)_____. This sedimentary rock, in turn, might later be converted to (b) _____, which is a foliated metamorphic rock with no visible minerals

A. (a) silt, (b) stone

B. (a) sandstone, (b) schist

C. (a) slate, (b) shale

D. (a) shale, (b) slate

E. none of the above combinations

13. Geologists use two types of time: (a)_____ time, which tells the order of events (i.e., which happened first) and (b)_____ time, which assigns dates to events (i.e., the number of years before the present).

A. (a) radioactive, (b) geologic

B. (a) geologic, (b) deep

C. (a) absolute, (b) relative

D. (a) relative, (b) absolute

E. none of the above combinations

14. Given the half-life of a radioactive element is 1 million years, how old would a rock be that contained a 50/50 ratio of parent to daughter element?

A. 500,000 years

B. 5,00,000 years

C. 100,000 years

D. 10,000,000 years

E. none of the above

15. Mass wasting is a process that involves (a)_____, and the driving force is (b)_____.

A. (a) weathering of rocks, (b) water

B. (a) melting of rocks, (b) heat

C. (a) downhill movement of material, (b) gravity

D. (a) metamorphism of rocks, (b) temperature and pressure

E. none of the above combinations

16. (a)_____ is mass wasting that occurs very slowly (approximately 1"/year). It occurs on most slopes because of (b)_____.

A. (a) Creep, (b) running water

B. (a) Creep, (b) expansion and contraction of the soil

C. (a) Earthflow, (b) running water

D. (a) A landslide, (b) earthquakes

E. none of the above combinations

17. The area next to a stream that floods:

A. is a floodplain

B. is a good place to build a house

C. should be protected from flooding by sandbags

D. all of the above

E. none of the above

18. People have made many attempts to control flooding. For instance, we have built (a)_____, which in turn form (b)_____ in which to store the water. We have also built (c)_____, which are linear ridges next to a stream. None of these solutions we have developed stops flooding. In fact, the best way to "control" flooding is to use the stream’s (d)_____ as a place to store water during a flood.

A. (a) dams, (b) lakes, (b) channelized streams, (d) pointbars

B. (a) lakes, (b) dams, (c) levees, (d) cutbanks

C. (a) dams, (b) lakes, (c) levees. (d) floodplain

D. (a) flat areas, (b) artificial floodplains, (c) channelized streams, (d) floodplain

E. none of the above combinations

19. Glaciers are defined as (a)_____ and form when (b)_____. Thus, cool summers contribute more to glacier formation than cold winters.

A. (a) large flowing bodies of ice, (b) snow does not melt during the summer

B. (a) large flowing bodies of ice, (b) all the snow melts during the summer

C. (a) large flowing bodies of ice, (b) there is high snowfall in the winter

D. (a) large snowfields, (b) there is high snowfall in the winter

E. none of the above combinations

20. (a)_____ percent void space in a rock and indicates how much water a rock can hold, while (b)_____ is the connectivity of these spaces and indicates whether water can flow through the rock.

A. (a) Permeability is the, (b) porosity

B. (a) Overdrafting is the, (b) recharge

C. (a) Porosity is the, (b) permeability

D. (a) Weathered calcite forms the, (b) recharge

E. none of the above combinations

21. In Moscow we obtain all of our water from wells drilled into:

A. large underground streams

B. a large underground reservoir

C. basalt

D. granite

E. none of the above

22. Which sequence of rock types occurs in the Moscow area, from oldest to youngest?

A. metamorphic belt rocks, granite, basalt

B. granite, basalt, metamorphic belt rocks

C. basalt, metamorphic belt rocks, granite

D. basalt, granite, the shales that contain plant fossils

E. none of the above sequences

23. Moscow Mountain is composed of (a)_____, and the rock in Moscow is (b)_____.

A. (a) granite, (b) basalt

B. (a) granite, (b) gabbro

C. (a) igneous rocks, (b) igneous rocks

D. both A and C

E. none of the above combinations

24. The plant fossils we saw on the field trip were preserved in (a)_____ -sized sediments. These sediments were deposited in a lake which formed behind a/an (b)_____ dam. These plant fossils indicate that the climate 15 million years ago in our area was (c)_____.

A. (a) sand, (b) granite, (c) hotter and drier

B. (a) mud, (b) basalt, (c) warmer and wetter

C. (a) silt, (b) granite, (c) hotter and drier

D. (a) sand, (b) basalt, (c) warmer and wetter

E. none of the above combinations

25. The current landscape around Moscow and to the west, termed the Palouse, forms as result of:

A. erosion of basalt

B. wind-blown sediments from the west

C. wind-blown sediments from the east

D. erosion of granite

E. none of the above

26. To summarize the geological development of our region (from past to present): Approximately 1 billion years ago, (a)_____. About 800 million years ago, the area (b)_____. About 100-200 million years ago, (c)_____. The last major rock type, (d)_____, formed about 15 million years ago.

A. (a) metamorphism occurred, (b) was dry, (c) divergence occurred, (d) granite

B. (a) metamorphism occurred, (b) was wet, (c) divergence occurred, (d) basalt

C. (a) sediments were deposited , (b) pulled apart, (c) convergence occurred, (d) basalt

D. (a) sediments were eroded , (b) pulled apart, (c) convergence occurred, (d) granite

E. none of the above combinations

27. A force applied to a rock is called (a)____. The rock's response to the force is called (b)_____.

A. (a) stress, (b) strain

B. (a) strain, (b) stress

C. (a) deformation, (b) fault

D. (a) deformation, (b) fold

E. none of the above combinations

28. When a rock has undergone plastic deformation, it can either break which creates (a)_____, or it can bend which creates (b)_____ in the rock.

A. (a) faults, (b) joints

B. (a) folds, (b) fractures

C. (a) fractures, (b) folds

D. (a) earthquakes, (b) joints

E. none of the above combinations

29. There are two types of dip-slip faults: normal faults form when the (a)_____ stress direction is perpendicular to the strike of the fault, while reverse faults from when the (b)_____ stress direction is perpendicular to the strike of the fault. Lastly, strike-slip faults have their greatest stress direction (c)_____ to their strike.

A. (a) greatest, (b) least, (c) parallel

B. (a) least, (b) greatest, (c) parallel

  1. (a) least, (b) greatest, (c) perpendicular

D. (a) greatest, (b) least, (c) perpendicular

  1. none of the above combinations

30. When an earthquake occurs, several types of waves are produced and travel away from the earthquake. The (a)_____-wave travels faster than the (b)_____-wave. Also, from these waves we can determine the nature of the earth's interior. For instance, we know the earth has an outer liquid core because (c)_____-waves will not travel through a liquid.

A. (a) P, (b) S, (c) S

B. (a) S, (b) P, (c) P

C. (a) compression, (b) shear, (c) compression

D. both A and C

E. none of the above combinations

31. The Kibbie Dome is an example of a/an _____.

A. dome

B. basin

C. syncline

D. anticline

E. none of the above

32. The epicenters of earthquakes can be used to (a)_____, and their foci can be used to (b)_____.

A. (a) determine the depth to an earthquake, (b) locate the epicenters

B. (a) locate plate boundaries, (b) distinguish between the three types of plate boundaries

C. (a) locate plate boundaries, (b) locate volcanoes

D. all of the above

E. none of the above combinations

33. Certain fault types occur at the three major types of plate boundaries. (a)_____ faults occur at converging boundaries, (b)_____ faults occur at diverging plate boundaries, and (c)_____ faults occur at transform plate boundaries.

A. (a) Normal, (b) reverse, (c) thrust

B. (a) Normal, (b) reverse, (c) strike-slip

C. (a) Reverse, (b) normal, (c) strike-slip

D. (a) Dip-slip, (b) oblique-slip, (c) strike-slip

E. none of the above combinations

34. The physiography of the sea floor supports the theory of plate tectonics. The shallow, elongate ridges mark the boundaries of (a)_____ plates, and the deep, elongate trenches mark the boundaries of (b)_____ plates.

A. (a) diverging, (b) transform

B. (a) diverging, (b) converging

C. (a) converging, (b) diverging

D. (a) converging, (b) transform

E. none of the above combinations

35. Another feature found in the (a)_____ that form the ocean floor is magnetic striping. This occurs from a combination of (b)_____ and (c)_____.

A. (a) basalts, (b) magma cooling at a spreading center, (c) changes in the earth’s magnetic fields

B. (a) shales, (b) magma cooling at a spreading center, (c) changes in the earth’s magnetic fields

C. (a) basalts, (b) magma cooling at a spreading center, (c) polar wandering

D. (a) rocks, (b) rock formation, (c) changes in the earth’s gravitational field

E. none of the above combinations

36. Evidence supporting plate tectonics comes from the theory of:

A. continental drift

B. sea-floor spreading

C. polar wandering

D. all of the above

E. none of the above

37. Plate tectonics is described as:

A. the theory that the earth’s surface is divided into several large moving plates

B. a unifying theory explaining many geological processes

C. the theory that the continents move

D. both A and B

E. none of the above

38. The continental crust is composed mainly of (a)_____. The ocean crust is composed mainly of (b)_____, and the rocks comprising the oceanic crust are much (c)_____ than those of the continent.

A. (a) basalt, (b) granite, (c) heavier

B. (a) granite, (b) basalt, (c) heavier

C. (a) granite, (b) basalt, (c) younger

D. both B and C

E. none of the above combinations

39. A/an (a)_____ is the total amount of material (both discovered and undiscovered), and a/an (b)_____ is the found profitably mineable material.

A. (a) resource, (b) reserve

B. (a) reserve, (b) resource

C. (a) ore, (b) deposit

D. (a) deposit, (b) ore

E. none of the above combinations

40. Before confronting environmental or resource use questions in the United States, it is helpful to know the approximate population of the US, which is:

A. 150,000,000

B. 1,500,000,000

C. 2,500,000

D. 25,000,000

E. 275,000,000

41. In the US we use approximately (a)_____ gallons of oil per day and must import approximately (b)_____ of the oil we use.

A. (a) 15,000,000, (b) 50%

B. (a) 15,000,000, (b) 80%

C. (a) 630,000,000, (b) 50%

D. (a) 630,000,000, (b) 20%

E. (a) 800,000,000, (b) 50%

42. In the US approximately _____ percent of our energy comes from hydrocarbons.

A. 10

B. 20

C. 40

D. 70

E. 90

43. Of the different forms of hydrocarbons, we get the most percent of our energy in the US from:

A. crude oil

B. natural gas

C. oil shale

D. coal

E. hydroelectric

44. If current projections are correct, we will run out of crude oil in approximately _____ years.

A. 10

B. 20

C. 35

D. 50

E. 100

45. Which of the following lists coals from lowest to highest rank (i.e., increasing carbon content)?

A. peat, lignite, anthracite, bituminous

B. peat, lignite, bituminous, anthracite

C. peat, bituminous, lignite, anthracite

D. lignite, peat, bituminous, anthracite

E. none of the above combinations

46. Historically, Idaho has been a mining state. Which of the following currently produces the most revenues in the state?

A. crushed rock

B. silver

C. gold

D. copper

E. phosphate

47. Asbestos is best defined as a/an (a)_____. There are different kinds of asbestos; (b)_____ asbestos is more of a health risk than (c)_____ asbestos.

A. (a) mineral fiber, (b) white, (c) blue

B. (a) human-made fiber, (b) blue, (c) white

C. (a) fiber, (b) blue, (c) white

D. (a) mineral fiber, (b) clay, (c) amphibole

E. none of the above combinations

48. Global warming is a theory stating that the earth’s atmosphere will warm as fossil fuels are burned because of increasing carbon dioxide in the atmosphere. One of the main sources of carbon dioxide is auto exhaust. However, I showed a calculation that:

A. the earth is indeed heating based upon increased carbon dioxide in the atmosphere

B. the earth is cooling based upon increased carbon dioxide in the atmosphere

C. world-wide humans exhale more carbon dioxide than autos produce

D. world-wide cows exhale more carbon dioxide than autos produce

E. none of the above.

49. In the future I would like to do all student evaluations on the web (any answer will be correct).

A. yes

B. no

C. no (we should have a choice on using the paper forms in class or the web)

D. no (evaluations should be done in class using class time)

E. I do not want to express an opinion on this subject.

50. I have made sure that my ID is correctly entered on the scan sheet, I will take the test with me when I leave, and I have answered all the questions on the test and entered them on the scan sheet.

A. yes

B. no