Soil Unit Test

What material fills up the pore spaces in the soil?

_____________and ____________

Check the 3 things on the back of an FFA jacket.

• Emblem

• State

• Chapter

• First and Last Name

Which soil particle is the loargest?

• Sand

• Silt

• Clay

• Rock

Plant roots are not typically in which layers?

• O & A

• B & C

• C & R

• O & R

Clayey textured soils are characterized by:

• being loose and single grain.

• having high moisture-holding capacity.

• having large soil particles.

• having low moisture-holding capacity.

Which soil horizon is most likely to erode first?

• O horizon

• A horizon

• B horizon

• C horizon

What kind of organisms are most important to the formation of soil?

• Plants

• Mammals

• Decomposers

• Humans

What Layer of the soil profile supports most of the plant and animal life on earth?

• O horizon

• A horizon

• B horizon

• C horizon

What is one way for soil formation?

• Time

• Water

• Algae

Which one is not a form of soil formation?

• Topography

• Organisms

• Climate

• Parent Material

• Ethanol