Results
#1. What makes up soil? (Select all that apply)
Select all that apply:
#2. What is Humus?
#3. Which of the following is not a type of soil particle.

#4. What is the layer labed as 'O'?

#5. What is the layer labed as 'A'?

#6. What is the layer labed as 'E'?

#7. What is the layer labed as 'B'?

#8. What is the layer labed as 'C'?
