EAS2600 Test2 Spring2008

EAS2600 Test2 Spring2008 - Exam 2 EAS 2600 Name_ MULTIPLE...

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Exam 2 EAS 2600 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The beginning of the Cambrian period marks an important event in animal evolution - the appearance of organisms with ________. A) wings B) cells C) vertebrae D) hard parts E) none of the above 2) The era of "ancient life" is the ________ era. A) Paleozoic B) Mesozoic C) Cenozoic D) Precambrian 3) Which of the following statements is true about banded iron formations A) their formation requires the transient prescence of oxygen B) they occur mostly in Precambrian rock formations C) the involve the removal of dissolved iron from ocean waters D) all of the above 4) A worm would stand a poor chance of being fossilized because ________. A) worms contain no carbon - 14 B) worms have been rare during the geologic past C) worms have no hard parts D) all of the above 5) Biogenic deposits in recent deep sea sediments are composed mostly of A) SiO2 and CaCO3 B) Fe2O3 and SiO2 C) MnO2 and Fe2O3 D) Fe2O3 and CaCO3 E) Fe2O3 and MnO2 6) Which of the following best characterizes an angular unconformity? A) The discordant boundary between older strata and an intrusive body of granite. B) Tilted strata lie below the unconformity; bedding in younger strata above is parallel to the unconformity. C) Horizontal lava ±ows lie below the unconformity and horizontal, sedimentary strata lie above. D) Tilted strata lie below the unconformity with loose, unconsolidated soil above. 7) The era known as the "age of mammals" is the ________. A) Cenozoic B) Mesozoic C) Precambrian D) Paleozoic 8) What is the age of the Earth accepted by most scientists today? A) 6.4 billion years B) 6.4 million years C) 4.5 billion years D) 4.5 million years 1
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9) Which one of the following could not have signiFcantly affected climatic variations and advances and retreats of ice sheets during the Pleistocene epoch? A) wobbling of Earth's rotational axis B) precession of Earth's orbit C) movements of Earth's tectonic plates D) all of the above 10) Which one of the following is NOT part of the continental margin? A) continental shelf B) continental trench C) continental rise D) continental slope 11) Which type of bacteria thrive in environments that lack free oxygen? A) foraminifera B) placental C) photosynthetic D) aerobic E) anaerobic 12) The suspended load of a stream ________. A) is highly soluble substances B) is deposited before the bed load C) usually consists of Fne particles D) moves along the bottom 13) The occurrence of a river with large meanders in an otherwise steep terrain is evidence for A) uplift of land B) thermal expansion of water C) a decreased gradient D) rising of sea level 14) The water table is ________. A) an
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EAS2600 Test2 Spring2008 - Exam 2 EAS 2600 Name_ MULTIPLE...

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