Soil Formation

Which component makes up approximately 5% of soil?

• Air

• Water

• Minerals

• Organic Matter

What are the three soil separates?

• Sand

• Silt

• Clay

• Gravel

Which component of soil makes up about 45% of its composition?

• Air

• Water

• Minerals

• Organic Matter

Which two components of soil makes up 50% of soil composition and can also be referred to as pore space?

• Air

• Water

• Minerals

• Organic Matter

What is the size of sand in diameter?

• > 2mm

• 2mm-0.05mm

• 0.05mm-0.002mm

• <0.002mm

What is the size of silt in diameter?

• > 2mm

• 2mm-0.05mm

• 0.05mm-0.002mm

• <0.002mm

What is the size of clay in diameter?

• > 2mm

• 2mm-0.05mm

• 0.05mm-0.002mm

• <0.002mm

Select all of the following that are considered soil classification systems.

• Soil Taxonomy

• USCS

• USDA

• AAHSTO

What does the texture of soil depend 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.

What type of weathering changes the composition of compounds to break down rocks?

• Physical

• Chemical

• Industrial

• Metaphysical