Radiocarbon Age Dating

5. Because of interaction and exchange with atmosphere and oceans, all living tissue maintains a fixed proportion of C-14. After death, the amount of C-14 begins to decrease.
  True
  False
6. A C-14 date estimates the time since the death of once-living things, up to about 50,000 years. Which of the following materials CANNOT be dated by this method?
  bones
  wood
  soil
  pottery with imbedded charcoal
  volcanic ash from Pompei

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