The average length of a period during which a given magnetic ...

[sarasara]

The average length of a period during which a given magnetic field polarity exists is about
 
  A) 10,000 years.
  B) 100,000 years.
  C) 500,000 years.
  D) 1,000,000 years.

Question 2

Which of the following soil horizon designations is i the correct sequence from the surface to the bedrock?
 
  A) O, E, C, B, A
  B) A, B, C, O, R
  C) S, O, I, L
  D) O, A, E, B, C

[Meganchabluk]

Answer to Question 1

C

Answer to Question 2

D

[sarasara]

Thanks for the timely response, appreciate it

[coreycathey]

Excellent