Soil Formation

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

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

Layers of soil are also known as:

• Soil Profiles
• Soil Horizons
• Soil sheets
• Soil cores

Which layer is the bottom of the soil profile?

• C - Parent Material
• D - Separated rock
• C - Melted Rock
• A - Topsoil

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

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

The texture of soil depends mainly on

• the types of plants that grow in the soil.
• the size of the particles in the soil.
• the color of the soil.
• the number of worms in the soil.

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

Which layer of soil has the BIGGEST pieces of rock in it?

• topsoil
• subsoil
• bedrock
• midsoil

What layer of soil is in the middle?

• topsoil
• bedrock
• minerals
• subsoil

Layers of soil are also known as:

• Soil Profiles
• Soil Horizons
• Soil sheets
• Soil cores

Which of the following is the most important soil formation factor

• Time
• Climate
• Slope
• Organisms