Soil

What are soil layers called?

• Rock

• Horizons

• Layers

• Profile

In which horizon do most animals such as bugs live?

• Humus

• Topsoil

• Subsoil

• Parent Material

• Bedrock

What is decayed organic material in soil?

• topsoil

• humus

• subsoil

• bedrock

What is the origin of clay, silt, and sand?

• humus

• bedrock

• subsoil

• topsoil

What are loam, clay loam, silt loam, and clay?

• Soil particle sizes

• Soil Textures

• Soil pH

• Soil composition

Which layer is the subsoil?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

Which layer is the parent material?

• Horizon O

• Horizon A

• Horizon B

• Horizon C

• Horizon R

What is humus?

• organic material rich in nutrients
• subsoil
• parent material
• trees

Which describes the soil layers in order from the surface?

• top soil, bedrock, horizon C, subsoil
• top soil, subsoil, horizon C, bedrock
• top soil, horizon C, subsoil, bedrock

What process breaks down bedrock to begin soil formation?

• leaching
• weathering
• decomposition
• humus