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Author Question: Oxygen, carbon, and ____ are gases exchanged in soil. a. helium b. lithium c. nitrogen d. ... (Read 94 times)

Wadzanai

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on: Jul 21, 2018
Oxygen, carbon, and ____ are gases exchanged in soil.
 
  a. helium
  b. lithium
  c. nitrogen
  d. calcium

Question 2

The continental crust, the rocky solid surface of the earth, is generally about ____ miles thick.
 
  a. 50
  b. 75
  c. 100
  d. 125


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tmlewis4706

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Reply #1 on: Jul 21, 2018
Answer to Question 1

C

Answer to Question 2

A


Wadzanai

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Reply 2 on: Jul 21, 2018
Excellent

peter

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Reply 3 on: Yesterday
Gracias!

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