The last pole reversal occurred ________ years ago and, based on ...

[Mollykgkg]

The last pole reversal occurred ________ years ago and, based on magnetic field decay, we are approximately ________ years from entering the next phase.
 
  A) 1 million; 200,000
  B) 20,0000; 50,000
  C) 1,000; 50
  D) 790,000; 1,000

Question 2

The horizon that is commonly called topsoil is the ________ horizon.
 
  A) A
  B) O
  C) E
  D) B
  E) C

[carlsona147]

Answer to Question 1

D

Answer to Question 2

A

[Mollykgkg]

Thanks for the timely response, appreciate it

[rachel]

Gracias!