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Author Question: Why does a potassium-argon dating time scale reset during heating? A) Expansion of the crystal ... (Read 227 times)

sarasara

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on: Jul 16, 2018
Why does a potassium-argon dating time scale reset during heating?
 
  A) Expansion of the crystal structure may permit the loosely caged argon atoms to escape.
  B) Reduction of the crystal structure may permit the loosely caged argon atoms to escape.
  C) It gets so hot that it throws off the time scale.
  D) This does not happen.

Question 2

What does a radioactive-isotope aging test on a rock determine?
 
  A) the age of the rock since metamorphism
  B) the date of formation of the rock-forming minerals
  C) the length of time the rock has existed in its location
  D) the age of the rock since sedimentation


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mochi09

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: B


sarasara

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

xiazhe

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Reply 3 on: Yesterday
Excellent

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