Soils

What is a material found on the surface of the earth consisting of rock, sand, clay, dead plants, and animal remains?

• silt

• soil

• bedrock

• loam

Which soil has the smallest particles?

• clay

• loam

• sand

• silt

What is the layer of rock that is below the soil?

• subsoil

• topsoil

• humus

• bedrock

Which soil has the largest particles?

• clay

• sand

• loam

• silt

What soil is a mixture of sand, silt, and clay?

• soil

• silt

• clay

• loam

What is the layer of soil just below the topsoil?

• soil
• subsoil
• topsoil
• terrace farming

Which layer of soil are these roots growing in?

• subsoil
• topsoil

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

What is the layer of soil that contains humus, leaf litter, and other organic matter?

• O - Organic
• A - Topsoil
• B - Subsoil
• R - Bedrock

Which layer is the bottom of the soil profile?

• C - Partially Weathered Parent Material
• D - Separated rock
• R - Bedrock
• A - Topsoil