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The flashcards below were created by user
ChantelleVu
on FreezingBlue Flashcards.
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The term for finding the age of a rock is
e. chronostratigraphy
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The absolute age of an object refers to
e. exactly how many years before today an object was formed
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All of the following statements about nuclear decay are true except
b. heat is an important reactant in nuclear decay
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The nuclear decay of 14C involves
d. a neutron splitting
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After nuclear decay, 14C becomes
d. Nitrogen
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According to the authors of "Geological Time," how many pieces of information are needed about a radioactive isotope to use the isotope in absolute dating?
e. three
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Radioactive dating methods
d. include measurements based off of radioactive isotopes
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The rate of decay for radioactive samples
e. is constant for any given isotope
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How is the decay of radioactive samples typically expressed?
d. half-life
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Which of the following isotopic systems has a half-life of 48.8 billion years?
c. 87Rb/87Sr
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Who wrote "Geological Time"?
c. David E. Fastovsky, Thomas Jordan, Frank Press, and John Sibbick
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The authors compare using the rubdium/strontium isotopic system to date remains from the past several thousand years to
c. time a hundred meter dash with a sundial
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Radiometric dating can only take place using samples obtained from
a. igneous rock
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The Mesozoic Era lasted from
d. 251 to 65 million years ago
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The Paleoxoic Era did not include
d. Cretaceous Period
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