Soil Layers Quiz

It is a fairly thin layer composed of organic matter called humus and minerals.

• Topsoil (A Horizon)

• Bedrock (R Horizon)

• Subsoil (B Horizon)

• Organic (O-Horizon)

This layer of the soil is located below the topsoil and it is composed of loosely arranged rocks, sand and clay.

• Subsoil (B- Horizon)

• Topsoil (A- Horizon)

• Bedrock (R- Horizon)

• Parent Rock (C- Horizon)

It is made up of undisturbed large boulders and gravel. What layer of the soil is this about?

• Parent Rock (C- Horizon)

• Bedrock (R- Horizon)

• Topsoil (A- Horizon)

• Organic (O- Horizon)

It is a thick layer of plant remains such as leaves and twigs.

• Bedrock (R- Horizon)

• Parent Rock (C- Horizon)

• Organic (O-Horizon)

• Topsoil (A- Horizon)

It is composed of rocks that are slowly breaking apart and is exposed to very little weathering. What layer of the soil is this about?

• Bedrock (R- Horizon)

• Topsoil (A- Horizon)

• Organic (O-Horizon)

• Parent Rock (C- Horizon)