Soil Profile (BL 18,Ln 3)

Name the 3 layers of soil.

• Topsoil and Humus, Subsoil, Bedrock

• Clay, Sand, Silt

• Gravel, Peat, Chalk

• Sandstone, Limestone, Shale

The bedrock layer is important to soil because:

• it provides the parent material for soil formation.

• it is the topmost layer of soil.

• it contains the most organic matter.

• it is where most plant roots grow.

Which layer of soil is primarily responsible for supporting plant life due to its nutrient content?

• Topsoil

• Subsoil

• All layers equally support plant life

• Bedrock

What is the main characteristic of subsoil compared to topsoil?

• Subsoil is the topmost layer of soil.

• Subsoil contains more water than topsoil.

• Subsoil is more fertile than topsoil.

• Subsoil has less organic matter than topsoil.

_________ is the bottommost layer of soil.

• Topsoil

• Clay

• Sand

• Bedrock