M2 Science: Chapter 8 Review

Which type of soil is most suitable to growing crops?

• Silt

• Clay soil

• Loamy soil

• Sandy soil

The darker colored soil usually contains more _____.

• Water

• Humus

• Decomposers

• Sediments

Why is organic matter an important part of soil?

• Decreases water infiltration into the soil

• Breaks down chemical pollutants

• Converts nitrogen in the air

• Serves as a reservoir for nutrients in the soil

Which of the following soil properties is important in determining the amount of water retained?

• soil color

• soil structure

• soil texture

• soil consistency

Soil consistency depends on _____.

• proportion of the sand, silt, and clay

• size ranges in the soil

• soil moisture content

• amount of minerals

Which horizon of a soil profile contains more humus?

• Horizon A

• Horizon B

• Horizon C

• Horizon O

Which of the following soil horizons is described as dark in color and a place where plant roots and small animals are found?

• Horizon A

• Horizon B

• Horizon C

• Horizon O

Which of the following factors affect the formation of soil?

• Climate

• Topography

• Biotic

• All of the above

Which of the following are uses for soil?

• Serves as a main foundation in construction

• Serves as habitat for many insects and organisms

• Used in making ceramics and pottery

• All of the above

Which of the following is NOT a method to improve soil?

• Incorporates cover crops to add organic matter to the soil

• Adjusts soil pH by adding ground limestone or sulfur compunds

• Add extra pesticides to reduce the number of pests in the soil

• Practices contour tillage and terracing to reduce soil erosion