The temperature of the ground stays nearly constant at any depth ...

[jenna1]

The temperature of the ground stays nearly constant at any depth below:
 
  A) 4 feet. B) 28 feet.
   C) 6 feet. D) The frost line.

Question 2

How does excess air affect the vent gas CO2 percentage?
 
  A) Excess air has no effect on vent gas CO2 percentage.
  B) Excess air completely eliminates CO2 in the vent gas.
  C) Excess air increases the vent gas CO2 percentage.
  D) Excess air reduces the vent gas CO2 percentage.

[Dnite]

Answer to Question 1

B

Answer to Question 2

D

[jenna1]

Excellent

[peter]

Thanks for the timely response, appreciate it