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Home Q & A Board Biology-Related Homework Help General Biology
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tifoanug tifoanug
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6 years ago
The time it takes for half of a radioisotope's atoms to decay ____.
  a. cannot be calculated
  b. is used to construct the geologic time scale
  c. is its half-life
  d. is the same for uranium 238 and carbon 14
  e. is highly variable

Question 2

Radiometric dating ____.
  a. is based on the premise that each isotope decays at a constant rate
  b. is unpredictable because of changes in temperature and pressure
  c. can be used to date sedimentary rock, but not fossils
  d. has a substantial error factor
  e. can only be used for dating animal fossils
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tcshepherd13tcshepherd13
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6 years ago
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tifoanug Author
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#2
6 years ago
Amazing, correctly answered
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