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. 3) Which of the following statements is true about banded iron formations 4) A worm would stand a poor chance of being fossilized because ________. 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? 7) The era known as the "age of mammals" is the ________. 8) What is the age of the Earth accepted by most scientists today? 1
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9) Which one of the following could not have significantly 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? 11) Which type of bacteria thrive in environments that lack free oxygen? 12) The suspended load of a stream ________.
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