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lacieb23 lacieb23
wrote...
Posts: 506
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6 years ago
Which of the following is NOT one of the four major
  intervals in the geologic time scale?
  a. Mesozoic
  b. Proterozoic
  c. Carboniferous
  d. Cenozoic
  e. Paleozoic

Question 2

The geologic time scale is subdivided on the basis of
  a. the appearance of different radioactive isotopes
  in different strata.
  b. levels of background extinction.
  c. periods of mass extinction.
  d. the appearance of different radioactive isotopes
  in different strata and levels of background
  extinction.
  e. the appearance of different radioactive isotopes
  in different strata, levels of background
  extinction, and periods of mass extinction.
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2 Replies

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Replies
wrote...
6 years ago
Answer to q. 1

Answer: c

Answer to q. 2

Answer: c
lacieb23 Author
wrote...
6 years ago
Just confirmed the same answer from my friend, thanks
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