FREE AND STUDY GAMES ABOUT QUIZ 7 GEOLOGY EXAM

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FREE AND STUDY GAMES ABOUT QUIZ 7 GEOLOGY EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -54 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Numerical age dates based on radioactivity are very important for studying Precambrian geologic history because fossils are rare or absent

Answer:

T Question 2: The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half-lives have elapsed since the material was 100% parent atoms

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between l and 2 Question 3: When a beta particle is emitted, the mass number of the isotope remains unchanged.

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T Question 4: The half-life of carbon-14 is about 6000 years. Assume that a sample of charcoal formed by burning of living wood 15,000 years ago. How much of the original carbon-14 would remain today?

Answer:

between one-fourth and one-eighth

Question 5: Who is credited with formulating the doctrine of uniformitarianism

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Hutton Question 6: Assume that man's recorded history can be stretched back to 4600 years before the present. This is approximately what fraction of geologic time?

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one millionth Question 7: Which of the following refers to the investigative process by which geologists identify and match sedimentary strata and other rocks of the same ages in different areas

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correlation Question 8: When a radioactive isotope decays by electron capture, the electron _______

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combines with a proton in the nucleus; the atomic number of the daughter is one less than the parent

Question 9: The term Paleozoic describes the era of ancient life forms

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T Question 10: Consider the names of the eras in the geologic time scale. What is meant by "zoic"

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life; living things Question 11: A worm would stand a poor chance of being fossilized because ______

Answer:

worms have no hard parts

Question 12: Catastrophism _____

Answer:

was a philosophy that was first expounded by the early Greeks

Question 13: Which of the following is not a very long-lived, radioactive isotope?

Answer:

C-14

Question 14: What is the age of the Earth accepted by most scientists today

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4.5 billion years Question 15: The percentage of radioactive atoms that decay during one half-life is always the same.

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T Question 16: Assume that you have just examined several flat-lying sedimentary layers. After much study you determine that there is a considerable span of time for which no sedimentary rock layer exists at this site. You have just discovered a(n) ________

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disconformity Question 17: Correlation of rock units between continents or widely separated areas is accomplished by using physical features such as color, texture, and thickness of units.

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F Question 18: The term Mesozoic refers to life forms intermediate in complexity between early and much later, more modern-looking life forms

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T Question 19: ________ is an erosional contact between tilted, older strata below and horizontal, younger strata above.

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An angular unconformity

Question 20: An unconformity is a buried ________

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surface of erosion separating younger strata above from older strata below Question 21: The ________ is the idea or concept that ancient life forms succeeded each other in a definite, evolutionary pattern and that the contained assemblage of fossils can determine geologic ages of strata

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principle of fossil (faunal) succession Question 22: The geologic time scale was devised before numerical dating using radioactivity was invented

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T Question 23: After two half-lives there is no longer any of the original radioactive material remaining.

Answer:

F

Question 24: The Paleozoic is the era of "ancient life."

Answer:

T

Question 25: Paleozoic - Mesozoic - Phanerozoic - Cenozoic

Answer:

Phanerozoic

Question 26: The era of "ancient life" is the ________ era

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Paleozoic Question 27: In the late 1700s James Hutton published his important work titled ________

Answer:

Theory of the Earth