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Author Question: To date relatively young rocks and materials, we use the decay of A) uranium-238 to lead-206. B) ... (Read 45 times)

fbq8i

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on: Jul 29, 2018
To date relatively young rocks and materials, we use the decay of
 
  A) uranium-238 to lead-206.
  B) potassium-40 to argon-40.
  C) carbon-14 to nitrogen-14.
  D) uranium-235 to lead-207.

Question 2

To date the age of Earth, we look for rocks with a high percentage of
 
  A) uranium-235 to lead-207.
  B) uranium-238 to lead-206.
  C) potassium-40 to argon-40.


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steff9894

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: B


fbq8i

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Reply #2 on: Jul 29, 2018
Thank you!


steff9894

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Reply #3 on: Jul 29, 2018
Always glad to help...


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