Test Review - Soil 1

What is soil?

• A type of rock found deep within the earth

• The organic and inorganic material on the surface of the earth that provides the medium for plant growth

• A form of sand used in construction

• The liquid component of the earth's surface

What is regolith?

• A type of organic fertilizer

• A layer of bedrock

• A layer of material supporting formed through weathering and contains proportion of biological compounds

• A classification of soil based on its texture

What percentage of soil composition is made up of minerals?

• 45%

• 25%

• 5%

• 55%

Which component makes up the smallest percentage of soil composition?

• Minerals

• Air

• Water

• Organic Matter

In a wet soil, what fills most of the pore space?

• Soil air

• Soil particles

• Soil water (with dissolved minerals)

• Organic Matter

What does the 'O' represent in the acronym CLORPT?

• Oxygen

• Organisms

• Oceans

• Oxidation

What is a soil profile?

• A type of soil used for agriculture

• A vertical section of soil that ranges from the surface to the underlying rock

• A method of classifying soil types

• A horizontal layer of soil

Which soil horizon is often rich in humus and minerals?

• Subsoil (B horizon)

• Bedrock (D horizon)

• Topsoil (A horizon)

• Weathered rock fragments (C horizon)

Which horizon is described as being poor in humus, but rich in minerals?

• Topsoil (A horizon)

• Subsoil (B horizon)

• Weathered rock fragments (C horizon)

• Bedrock (D horizon)

What characterizes the weathered rock fragments (C horizon)?

• High amounts of organic matter

• Rich in humus and minerals

• Little or no plant or animal life

• The same composition as the bedrock