Exploring Soil Layers Quiz

What is the topmost layer of soil that is rich in organic material called?

• Bedrock

• Subsoil

• Topsoil

• Humus

Which layer of soil is primarily composed of weathered rock and is located beneath the subsoil?

• Humus

• Bedrock

• Topsoil

• Subsoil

What is the term for the decayed organic matter found in soil?

• Subsoil

• Bedrock

• Humus

• Topsoil

Which layer of soil is known for having a higher concentration of minerals and less organic material compared to the topsoil?

• Humus

• Subsoil

• Bedrock

• Topsoil

Which of the following is NOT a layer of soil?

• Humus

• Topsoil

• Subsoil

• Water table

Which layer of soil is most important for plant growth due to its high nutrient content?

• Bedrock

• Subsoil

• Topsoil

• Humus

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

What is the primary component of the bedrock layer?

• Organic matter

• Minerals

• Weathered rock

• Clay

Tags

NGSS.MS-ESS2-1

Which layer of soil is directly above the bedrock?

• Topsoil

• Humus

• Subsoil

• Clay

What is the main role of humus in the soil?

• To provide a base for construction

• To supply nutrients and improve soil structure

• To act as a water reservoir

• To form the foundation of the Earth's crust

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which layer of soil is typically the darkest in color due to its high organic content?

• Bedrock

• Subsoil

• Topsoil

• Humus

Tags

NGSS.MS-LS2-3