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Author Question: If we use a 24-hour day to represent Earth's history, humans would have existed for the last: a. 1 ... (Read 181 times)

bobbysung

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If we use a 24-hour day to represent Earth's history, humans would have existed for the last:
 a. 1 minute.
  b. 1 hour.
  c. 2 hours.
  d. 5 hours.
  e. 12 hours.

Question 2

The boundaries between the distinct layers found in many sedimentary rocks are called:
 a. foliation.
  b. regolith.
  c. outcrops.
  d. rock cycles.
  e. bedding planes.



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anoriega3

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Answer to Question 1

A

Answer to Question 2

E





 

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