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Author Question: Dates on zircons from Western Australia suggest that the oldest crustal rocks are more than 4 ... (Read 25 times)

Awilson837

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on: Jul 15, 2018

Dates on zircons from Western Australia suggest that the oldest crustal rocks are more than 4 billion
  years old. Indicate whether the statement is true or false.



Question 2

In five half-lives, one-sixteenth of a radioactive substance will remain. Indicate whether the statement is true or false.


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Tabitha_2016

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Reply #1 on: Jul 15, 2018
Answer to Question 1

T

Answer to Question 2

F


Awilson837

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Reply 2 on: Jul 15, 2018
Gracias!

helenmarkerine

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Reply 3 on: Yesterday
Excellent

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