Relative vs Absolute Dating in Geologic Strata
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Questions and Answers

What is the process used to determine the age of the fossil found underneath the layer of volcanic rock?

  • Half-life dating
  • Radiometric dating (correct)
  • Relative dating
  • Absolute dating
  • What is the half-life of Uranium 238 to Lead 206 used in radiometric dating?

  • 1.52 million years
  • 4.5 years
  • 5,730 years
  • 4.5 million years (correct)
  • Which isotope pair has a half-life of 5,730 years and is commonly used in radiometric dating?

  • Beryllium 10 to Boron 10
  • Carbon-14 to Nitrogen-14 (correct)
  • Potassium-40 to Argon-40
  • Uranium 238 to Lead 206
  • What is the ratio of Beryllium 10 to Boron 10 found in the volcanic rock layer above the fossil?

    <p>1:32</p> Signup and view all the answers

    Why is radiometric dating much more powerful for igneous rocks than sedimentary rocks?

    <p>Igneous rocks contain radioactive isotopes that can be used for dating.</p> Signup and view all the answers

    What is the main reason for mentioning the Cambrian explosion, Permian extinction, and Cretaceous-Tertiary extinction?

    <p>To explain the key boundary dates for the major eras.</p> Signup and view all the answers

    What is the significance of plate tectonics in relation to earthquakes?

    <p>Continental drift caused by plate tectonics can lead to seismic activity.</p> Signup and view all the answers

    What is the main implication of sediments being dated when lava flows are found in the same layer?

    <p>It allows for accurate dating of both the sediments and the lava flows.</p> Signup and view all the answers

    What is the primary reason for the variation in sea levels over time?

    <p>Fluctuations in global climate due to continental drift and volcanic activity.</p> Signup and view all the answers

    What is the significance of banded iron formations in relation to oxygen levels and geologic time?

    <p>They indicate a rapid increase in oxygen levels precipitating iron oxide from the ocean.</p> Signup and view all the answers

    What is the main consequence of carbon dioxide removal hypothesized to have caused near-total ice ages?

    <p>The loss of greenhouse gases led to freezing of most of the Earth's oceans.</p> Signup and view all the answers

    What is indicated by high C13:C12 ratios in rocks?

    <p>An increase in C13:C12 ratios due to photosynthesis accumulating C12 isotopes.</p> Signup and view all the answers

    What is the main implication of sediments being dated when lava flows are found in the same layer?

    <p>It allows for accurate dating of both the sediments and the lava flows.</p> Signup and view all the answers

    What evidence supports the hypothesis of near-total ice ages during the Neoproterozoic period?

    <p>Glacial origin rock formations at low latitude and high C13:C12 ratios.</p> Signup and view all the answers

    Who is the instructor for the Thursday morning class?

    <p>Shari Zimmerman</p> Signup and view all the answers

    At which time does the Wednesday night class begin?

    <p>6:30 pm</p> Signup and view all the answers

    Where are the labs held?

    <p>Science Building B-241</p> Signup and view all the answers

    What is the email address of the instructor for the Wednesday morning class?

    <p><a href="mailto:[email protected]">[email protected]</a></p> Signup and view all the answers

    Who is the contact person for the textbook?

    <p>Marta J. Laskowski</p> Signup and view all the answers

    What are the office hours of Dr. Mitchell Baker?

    <p>Monday 10-12</p> Signup and view all the answers

    What percentage of the final grade does the lecture material contribute to?

    <p>60%</p> Signup and view all the answers

    What is the total percentage of the laboratory work evaluation component in the final grade?

    <p>5%</p> Signup and view all the answers

    What could result in a failing course grade and possibly dismissal from the institution?

    <p>Plagiarism and cheating</p> Signup and view all the answers

    What should students do to avoid being accused of plagiarism?

    <p>Paraphrase using their own words and provide proper citations in the bibliography</p> Signup and view all the answers

    What did John Walsh's appointment to the United States Senate offer the Democratic Party?

    <p>A seasoned military veteran</p> Signup and view all the answers

    What was John Walsh's previous role in Montana?

    <p>Adjutant General of the National Guard</p> Signup and view all the answers

    How did John Walsh contribute to his state's National Guard?

    <p>He led military operations</p> Signup and view all the answers

    What is one of the consequences of carbon dioxide removal hypothesized to have caused near-total ice ages?

    <p>Release of methane gas from permafrost</p> Signup and view all the answers

    What is the importance of plate tectonics in relation to earthquakes?

    <p>It affects the distribution of earthquakes</p> Signup and view all the answers

    What is emphasized as a word of caution regarding academic violations?

    <p>Plagiarism and cheating</p> Signup and view all the answers

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