Soil Science

Topsoil makes up the ____ Horizon?

• A

• B

• C

• R

The B Horizon is also called ______________.

• Topsoil

• Subsoil

• Permafrost

• Bedrock

The deepest layer of the soil profile is?

• Subsoil

• Parent Material

• Bedrock

• Organic matter

The O Horizon is made up of what?

• Organic Matter

• Fossil Fuels

• Unweathered Rock

• Parent Material

What does the C Horizon consist of?

• Parent Material

• Whetered Rock

• Bedrock

• Organic Matter

What does the R Horizon consist of?

• Parent Material

• Soil

• Organic Matter

• Bedrock

The four main components of soil are Air, Water, _________ & __________.

• Rock

• Soil

• Mineral

• Organic Matter

What are the 3 soil particles from largest to smallest?

• Sand, Silt, Clay

• Clay, Silt, Sand

• Silt, Clay, Sand

• Silt, Sand, Clay

The amount of Sand, Silt and Clay in the soil is referred to as what?

• Soil Horizons

• Soil Profile

• Soil Layers

• Soil Texture

Soil and nutrients that move with runoff during rain events is best described as what?

• Weathering

• Erosion

• Combustion

• Decomposition