APES Soils Review

Front

What is the texture of a soil sample that is 60% clay, 30% silt, and 10% sand?

Back

Clay

Front

What are the deep, underlying non-soil materials called?

Back

Bedrock

Front

Which layer(s) of soil contain most of the humus and soil organisms?

Back

1 and 2 only (leaf litter, horizon O and topsoil, horizon A)

Front

What is the rate at which water flows through the soil called?

Back

Permeability

Front

What is soil made of?

Back

Weathered rocks and minerals, dead plants and animals, air and water (all of the above)

Front

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

Back

Topsoil (Horizon A)

Front

What is the layer of soil below the topsoil that contains minerals and nutrients?

Back

Subsoil (Horizon B)

Front

What is the term for the ability of soil to hold water?

Back

Soil moisture retention

Front

What is the process by which soil is formed from weathered rock?

Back

Soil formation or pedogenesis

Front

What is the term for the spaces between soil particles that hold air and water?

Back

Soil pores