The _____ ended with the greatest mass extinction ever to occur on Earth.
A) Tertiary Period
B) Jurassic Period
C) Paleozoic Era
D) Precambrian interval
E) Cenozoic Era
Correct Answer:
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Q24: The _ of a radioactive material is
Q25: The _ is based upon the observation
Q26: When the _ came to a close,
Q27: Isotopic dating has shown that the Precambrian
Q28: In geology, _ usually means determining time
Q30: The _ is the principle says that
Q31: When marine geologists collects a core of
Q32: The half-life of the carbon 14 isotope
Q33: _ denotes the vast amount of time
Q34: _ are subdivisions of eras.
A) Ages
B) Intervals
C)
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